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  Daily Lesson Log Teacher Learning Area Science
  Teaching Date
  Quarter First (Physics)
  and Time
  DAY: MONDAY
  
  I. OBJECTIVES
  
  ##  The learner demonstrates understanding of Newton’s three
  
  A. Content Standards laws of motion and uniform circular motion.
  
  ##  The learner shall be able to develop a writer plan and
  
  B. Performance Standards implement a “Newton’s Olympics”.
  
  C. (S8FE-Ia-15)
  
  ##  Investigate the relationship between the amount of force
  
  applied and the mass of the object to the amount of change in
  Learning Competencies / Objectives the object’s motion.
  Write the LC code for each
  Objectives:
  1. Identify the forces acting on an object at rest.
  2. Explain why objects stay at rest.
  
  ## Module I: FORCES AND MOTION
  
  II. CONTENT
  Lesson 1: BALANCED AND UNBALANCED FORCES
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 5 - 8
  2. Learner's Materials Pages pp. 3 - 6
  3. Textbook Pages
  Resource (LR) portal
  Lesson Guide Science 8 (First Quarter- pp. 1-5)
  
  ## B. Other Learning Resource https://www.google.com.ph/search?
  
  pictures&oq=balanced+and+unbalanced+forces
  
  IV. PROCEDURES
  
  Present the following statement in class and ask the students if they
  agree or disagree with them. Select two to three students per group to
  
  ## A. Reviewing previous lesson or 1. Force is needed to stop an object.
  
  presenting the new lesson 2. Force always results to motion.
  3. Force can act even at a distance.
  4. Objects have the tendency to remain at rest.
  5. Objects have the tendency to resist change.
  
  be printed)
  
  ## B. Establishing a purpose for the Lesson
  
  C. Presenting examples / instances of the What have you observed on the picture presented?
  new lesson
  
  The teacher will place a ball or any object on top of a table and ask:
  
  D.
  Discussing new concepts and
  practicing
  new skills #1
  a) Will this object move by itself?
  b) How can we make this object move?
  c) While it is moving, how can we make the object speed up or slow
  down?
  d) How can make it stop?
  e) How can we make it change its direction?
  
  ## E. Discussing new concepts and
  
  Do the activity 1 Forces on object at rest in Lesson Guide Science 8
  practicing
  (First Quarter) pp. 5 or LM pp. 5- 6
  new skills #2
  Presentation of the output per group/ Processing:
  
  Analysis:
  
  Situation 1
  1. Is the pen at rest or in motion?
  2. Are there forces acting on the pen? If yes, draw the forces. You may
  F. use arrows to represent these forces.
  Developing mastery
  3. What happens to the pen? What could have caused the pen’s
  motion?
  
  Situation 2
  1. Is the book at rest or in motion?
  2. Are there forces acting on the book? If yes, draw the forces
  acting on the book.
  3. Did the book move? How will you make the book move?
  
  ## Since friction is a resistance force that slows down or prevent motion,
  
  Finding practical applications of
  How is friction important in:
  concepts
  a. walking
  and skills in daily living
  b. writing
  c. running vehicles
  1. What is force?
  H. 2. What are some other forces that can cause something to move?
  Making generalizations and
  3. How does gravity affect object on earth?
  abstractions
  4. What is a force that can cause an object to slow down or have little
  movement?
  5. In your own words define friction.
  Multiple Choice: Read each statement carefully and write only the letter
  
  ## 1. A book is at rest on top of a table. Which of the following is correct?
  
  A. There is no force acting on the book.
  B. The book has no inertia.
  C. There is no force acting on the table.
  *D. The book is in equilibrium.
  
  ## 2. Which of the following situations involves friction?
  
  A. A bicycle rolling down a hill
  I. Evaluating Learning
  B. A baseball player sliding into 2nd base
  C. A diver falling through the air to a pool
  *D. All of the above experience some friction.
  
  3. What is gravity?
  A. Newton’s first law
  B. The force that objects exert on each other because of their
  masses
  *C The downward pull on the Earth
  D. The friction that an object has put on it
  4. Which is the best example of gravity?
  A. A car hits a tree, and its motion stops
  B. A breeze blows, and a sailboat moves
  C. A book is pushed, and it moves across the table
  *D. A person drops a ball, and it falls to the ground
  
  ## 5. How does Earth ‘s gravity affect objects near Earth?
  
  A. It pushes them away.
  *B. It pulls them in
  C. It makes them larger.
  D. It makes them move faster.
  Ask the students to write situation/ examples where the presence of
  J. Additional activities for application or
  other forces are beneficial.
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored
  below 80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked
  well? Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did
  I
  Use or discover which I wish to share with
  other teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date
  Quarter First (Physics)
  and Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of Newton’ three laws of
  
  A. Content Standards motion and uniform circular motion.
  
  ## The learner shall be able to develop a writer plan and implement a
  
  B. Performance Standards “Newton’s Olympics”.
  
  C. (S8FE-Ia-16)
  
  ##  Infer that when a body exerts a force on another, an equal
  
  amount of force is exerted back on it.
  Learning Competencies / Objectives
  Objectives:
  Write the LC code for each
  1. Describe the conditions when two forces balance
  2. Explain the effect of balanced forces on the state of motion of
  an object.
  
  ## II. CONTENT Module I: FORCE AND MOTION
  
  Lesson 2: BALANCED AND UNBALANCED FORCES
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 5 - 8
  2. Learner's Materials Pages pp. 3 - 6
  3. Textbook Pages
  EASE Physics, Module 10. Lesson 3
  Resource (LR) portal
  
  B. Other Learning Resource Lesson Guide Science 8 (First Quarter- pp. 8-10)
  
  IV. PROCEDURES
  
  A.
  Reviewing previous lesson or What are the forces acting on an object at rest?
  presenting the new lesson What are examples of balanced forces?
  
  Students were given time to watch a short video clip about balanced
  and unbalanced forces
  B. Establishing a purpose for the Lesson
  
  ## C. Presenting examples / instances of the
  
  Give reaction to the video presented
  new lesson
  D. Discussing new concepts and
  Do the activity 2 in Lesson Guide Science 8 (First Quarter) pp. 8 – 9 or
  practicing
  Learners’ Module pp. 7
  new skills #1
  
  ## 1. When the cardboard is at rest, how do the magnitudes and directions
  
  Discussing new concepts and
  E. of the pair of forces acting on it compare?
  practicing
  2. If you draw the lines of action of all the forces acting on the board
  new skills #2
  and extend the lines, what will you get?
  
  ## F. Developing mastery Discuss the answers in the activity
  
  Study the given pictures below and describe the forces involved.
  
  ## Finding practical applications of
  
  G.
  concepts
  and skills in daily living
  The following ideas must be realized by the students:
  
  ## If two forces acting on an object are equal in magnitude but opposite in
  
  direction, they are considered as balanced forces. These forces must
  lie along the same line.
  Making generalizations and
  H.
  abstractions
   If the forces acting on an object are balanced, the object either
  stays at rest or continues to move at constant velocity.
  
  ##  If the forces acting on an object are unbalanced, the motion of
  
  the object will change.
  
  Direction: Read each statement carefully and write the letter of the
  
  ## 1. ______________ refers to when a force is equal and opposite.
  
  *A. balanced force
  B. unbalanced force
  C. magnitude
  D. friction
  
  2.When one force in a pair is greater than the other, we call this:
  A. balanced force
  *B. unbalanced force
  C. magnitude
  D. friction
  
  ## 3. If two forces are acting on an object they are equal in magnitude
  
  A. and equal in direction
  I. Evaluating Learning *B. and in opposite direction
  C. cancel each other
  D. none of the above
  For question no 4 and 5 refer to the diagram below
  Two tugboats are moving a barge. Tugboat A exerts a force of 3000
  N to the left. Tugboat B exerts a force of 5000N in the same
  direction.
  
  ## a. Draw arrows showing the individual forces of the tugboats in #1.
  
  b. Are the forces balanced or unbalanced? ______________
  c. In what direction will the barge move? ________________
  
  ## J. Additional activities for application or 1. define what inertia is.
  
  remediation 2. What is stated in the first law of motion?
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored
  below 80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked
  well? Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did
  I
  Use or discover which I wish to share with
  other teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date
  Quarter First (Physics)
  and Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of Newton’s three laws
  
  A. Content Standards
  of motion and uniform circular motion.
  The learners shall be able to develop a written plan and implement a
  B. Performance Standards
  “Newton’s Olympic”
  C. S8FE –Ib-17
   Demonstrate how a body responds to changes in motion.
  
  ## Learning Competencies / Objectives Objectives:
  
  Write the LC code for each 1. State the Law of Inertia
  2. Relate inertia to mass
  3. Cite situations where the law of inertia applies.
  
  ## Module I: FORCE AND MOTION
  
  II. CONTENT Lesson 3: NEWTON’S THREE LAWS OF MOTION
  The Law of Inertia
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp 10-11
  2. Learner's Materials Pages pp. 10 -12
  3. Textbook Pages
  EASE Physics, Module 10. Lesson 3
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide G8 First Quarter pp. 11 - 12
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or
  
  Differentiating balanced and unbalanced forces
  presenting the new lesson
  Let the students guess the word being defined by solving the jumbled
  letters.
  
  A S S M
  
  ## 2. It is a push or pull upon an object resulting from the object’s
  
  interaction with another object.
  
  R E C F O
  B. Establishing a purpose for the Lesson
  3. An action or process of moving or of changing place or position.
  
  T I N O O M
  
  of
  motion.
  
  I A E R I T N
  
  ## Are those set of words familiar to you?
  
  Presenting examples / instances of the
  new lesson
  C. What ideas came in your mind when you met those words we had
  unscrambled?
  
  ## The learners will analyze the picture of the two wrestlers by
  
  Discussing new concepts and
  comparing their masses and relating the concept of mass to inertia.
  D. practicing
  (see figure on pp. 11 LG grade 8 First Quarter)
  new skills #1
  
  ## E. Discussing new concepts and
  
  practicing Do the activity on Inertia (A and B) Learners’ Module pp. 11 – 12
  new skills #2
  Questions:
  
  PART A.
  
  ## 1. What happens when you slowly pulled the cardboard? Explain.
  
  F. Developing mastery 2. What happens when you flipped the cardboard? Explain.
  PART B.
  
  1. What happen to the remaining books after one book was pulled?
  Why is this so?
  
  ## 2. Relate your observation to the concept of inertia.
  
  Use the following examples to explain how Newton's first law occurs
  in everyday events:
  
  a) car suddenly stops and you strain against the seat belt.
  
  G. b) when riding a horse, the horse suddenly stops and you fly over its
  Finding practical applications of
  concepts
  and skills in daily living
  c) the magician pulls the tablecloth out from under a table full of
  dishes.
  
  ## e) car turns left and you appear to slide to the right.
  
  Newton's first law states that an object at rest will stay at rest or an
  object in motion will stay in motion and travel in straight line, as long
  H. Making generalizations and as no external net force acts on it. The object will change its state of
  abstractions motion only if there is unbalanced or net force acting upon it. Inertia
  about the lesson is measured in terms of mass. An object having greater mass has
  greater inertia
  
  ## 1. According to Newton's First Law of Motion,
  
  A. an object in motion eventually comes to a stop.
  B. an object at rest eventually begins to move.
  C. an object at rest always remains at rest.
  *D. an object at rest remains at rest unless acted upon by a net
  force.
  
  ## 2. The greater the mass of an object,
  
  A. the easier the object starts moving.
  B. the more space it takes up.
  *C. the greater its inertia.
  I. Evaluating Learning D. the more balanced it is.
  
  known
  as
  A. balance.
  B. force
  *C. inertia.
  D. mass.
  
  is newton's
  *A. first law
  B. second law
  C. third law
  D. fourth law
  
  ## 5. Which of these best describes the concept of inertia?
  
  A. A force that attracts objects with mass
  B. The tendency of an object to float in water
  C. A force created when surfaces are in contact
  *D. The tendency of an object to resist a change in motion
  
  J. Additional activities for application or
  remediation 1. Define acceleration.
  2. What is stated in the second law of motion?
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored
  below 80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked
  well? Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did
  I Use or discover which I wish to share
  with other teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date
  Quarter First (Physics)
  and Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of Newton’s three laws
  
  A. Content Standards
  of motion and uniform circular motion.
  The learner shall be able to develop a writer plan and
  B. Performance Standards implement a “Newton’s Olympics”.
  
  S8FE –Ib-17
   Demonstrate how a body responds to changes in motion.
  
  Objectives:
  Learning Competencies / Objectives
  C. 1. State the Law of Acceleration.
  Write the LC code for each
  2. Discuss the relationship between net force on an object and its
  acceleration, and between the mass of an object and its
  acceleration.
  3. Cite some applications of this law in our daily life.
  Module I: FORCE AND MOTION
  II. CONTENT Lesson 4: THREE LAWS OF MOTION
  Law of Acceleration
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 11- 12
  2. Learner's Materials Pages pp. 15 - 16
  3. Textbook Pages
  EASE Physics, Module 10. Lesson 3
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide G8 First Quarter pp. 14 - 19
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or What is inertia?
  
  presenting the new lesson How is the law of inertia related to mass?
  Study the picture.
  Can a man pushes the car?
  How much force is needed by the man to push the car?
  
  ## B. Establishing a purpose for the Lesson
  
  The teacher will present two balls of different masses. Then ask the
  students which of the two balls will accelerates faster?
  Why?
  
  new lesson
  
  ## tennis ball bowling ball
  
  1. Differentiate the two balls in terms of mass. Which has the greater
  D. Discussing new concepts and mass?
  practicing
  new skills #1 2. If equal amount of force will be applied in the two balls, then
  which will accelerates faster?
  E. Discussing new concepts and Do the activity on The Law of Acceleration, Lesson Guide G8 First
  practicing Quarter pp.17 - 19
  new skills #2
  
  ## A. 1. What variable/s is/are said to be constant in the activity?
  
  2. What is the effect of varying the amount of force on the
  acceleration of the cart?
  F. 3. What relationship exists between the force and acceleration
  Developing mastery when the mass of the cart is kept constant?
  (Leads to Formative Assessment 3) B. 1. What variable/s is/are said to be constant in the activity?
  2. What is the effect of varying the mass on the acceleration of
  the cart?
  3. What relationship exists between the mass and acceleration
  when the force is kept constant?
  
  ## G. Present the statement in the class “ You may be bigger but I am
  
  Finding practical applications of faster”
  concepts a. How does this line illustrate Newton’s Second Law of Motion?
  and skills in daily living b. How is the statement related to mass and acceleration?
  
  ## 1. State the second law of motion
  
  2. How is acceleration related to the object’s mass and the amount
  H. of force exerted?
  Making generalizations and
  3. What relationship exists between acceleration and force; force
  abstractions
  and mass?
  4. How is the second law of motion applied to everyday
  occurrences?
  
  Direction: Read each statement carefully and write the letter of the
  1. Which among the Newton’s Laws of Motion states that force
  equals mass times acceleration?
  A. 3rd Law B. 1st Law
  *C. 2nd Law D. all of the above
  
  ## 2. According to Newton's 2nd Law of Motion, force equals –
  
  A. mass divided by acceleration
  B. mass plus acceleration
  C. mass subtract acceleration
  *D. mass times acceleration
  
  ## 3. How does the acceleration of an object change in relation to its
  
  mass? It is _________.
  A. directly proportional
  I. Evaluating Learning *B. inversely proportional
  C. acceleration doesn’t depend on mass at all
  D. neither A or B
  
  ## 4. Suppose a cart is being moved by a force. If suddenly a load is
  
  dumped into the cart so that the cart’s mass doubles, what
  happens to the cart’s acceleration?
  B. It doubles.
  *C. It halves.
  D. It quarters.
  
  ## 5. Which will accelerate faster?
  
  A. a 1000 tons truck
  *D. a race car
  J. Additional activities for application or
  Explain how mass differs from weight.
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored
  below 80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D.
  No. of learners who continue to require
  remediation
  
  ## E. Which of my teaching strategies worked
  
  well? Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did
  I
  Use or discover which I wish to share with
  other teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date
  Quarter First (Physics)
  and Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of Newton’s three laws
  
  A. Content Standards
  of motion and uniform circular motion.
  The learner shall be able to develop a writer plan and
  B. Performance Standards implement a “Newton’s Olympics”.
  
  C. S8FE –Ib-17
   Demonstrate how a body responds to changes in motion.
  Learning Competencies / Objectives
  Objective:
  Write the LC code for each
  Solve problems involving the interrelationships of net force, mass
  and acceleration
  
  ## Module I: FORCE AND MOTION
  
  II. CONTENT Lesson 5: THREE LAWS OF MOTION
  The Law of Acceleration: Computation
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 13- 16
  2. Learner's Materials Pages pp. 15 - 17
  
  3. Textbook Pages
  Physics ( Science and Technology Textbook- NPSBE Edition)
  EASE Physics, Module 10. Lesson 3
  Resource (LR) portal
  
  ## B. Other Learning Resource
  
  Lesson Guide G8 First Quarter pp. 20 - 22
  
  IV. PROCEDURES
  
  A. Reviewing previous lesson or Ask the students to restate the second law into a simple statement.
  presenting the new lesson
  Derivation of Formula:
  
  ## From the statement that acceleration is directly proportional
  
  to force at constant mass.
  
  ## Acceleration also varies with mass. As the mass of the object
  
  increases with the same amount of force applied, its acceleration
  decreases thus:
  a= k(1/m) where K=net force (eq.2)
  B. Establishing a purpose for the Lesson
  Combining the two equations, we have
  
  a α F and a α 1/m
  
  Therefore a α F/m
  
  Mathematically, a = F/m
  where a= acceleration
  m= mass
  F= force
  
  ## Give and discuss at least two examples of situation/problems on the
  
  Presenting examples / instances of the
  C. Law of Acceleration
  new lesson
  1. A huge stone is pushed with 30 N of force. If there is only 5N of
  friction and the stone’s mass is 88 kg. What is the acceleration of
  the table?
  
  ## 2. A car is being towed. If its mass is 1750 kg and it accelerated at
  
  5m/s2, how much netforce is involved?
  
  ## D. Discussing new concepts and
  
  Do the exercise in Lesson Guide G8 First Quarter pp 21 (choose
  practicing
  items which will be solved individually/ in group)
  new skills #1
  E. Discussing new concepts and
  practicing Presentation of the outcomes.
  new skills #2
  F. Developing mastery
  Discuss the answers in the exercise given.
  Engineers at the Johnson Space Center must determine the net
  G. Finding practical applications of force needed for a rocket to achieve an acceleration of 70 m/s2 . If
  concepts the mass of the rocket is 45,000 kg, how much net force must the
  and skills in daily living rocket develop.
  
  A = F/m
  F = ma
  M = F/a
  
  ## If the unit of Fnet ( Fn) is in Newton, mass(m) is in kilogram (kg) and
  
  Making generalizations and
  H. acceleration is in meter per second/second (m/s2)
  abstractions
  Since force is a vector quantity and mass is a scalar quantity
  ,acceleration is also a vector quantity where acceleration follows the
  direction of the net force
  
  ## The unit of of acceleration can be derived also from N/kg, since
  
  1N = 1 kg.m/s2 therefore, N/kg = kg.m/s2 /kg = m/s2
  
  ## Direction: Solve problems involving the Law of acceleration then
  
  write the letter of the correct answer.
  
  ## 1. What is the mass of a truck if it produces a force of 14,000N
  
  while accelerating at a rate of 5 m/s2 ?
  
  ## A. 280 kg *B. 2800kg
  
  C. 70,000kg D. 7000kg
  
  ## 2. Which is the correct unit of acceleration?
  
  A. m/s *B. m/s2 C. kg.m/s D. kg.m/N
  
  ## 3. Suppose that a sled is accelerating at a rate of 2m/s2 . If the net
  
  I. Evaluating Learning
  force is tripled and the mass is halved, what then is the new
  acceleration of the sled?
  A. decrease by half B. doubled
  
  ## 4. Suppose a ball of mass 0.60 kg is hit with a force of 12 N. Its
  
  acceleration will be:
  *A. 20 m/s2 B. 40 m/s2 C. 10 m/s2 D. 20 m/s
  
  ## 5. If the ball in question no. 4 is increased by 24 N, what is the
  
  increased in acceleration?
  A. 20 m/s2 B. 30 m/s2
  *C. 4 0 m/s2 D. 50 m/s2
  
  J. Additional activities for application or Give additional information regarding: balance and un balance
  remediation forces>
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored
  below 80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked
  well? Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did
  I
  Use or discover which I wish to share with
  other teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date
  Quarter First (Physics)
  and Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of Newton’s three laws
  
  A. Content Standards
  of motion and uniform circular motion.
  The learner shall be able to develop a writer plan and
  B. Performance Standards implement a “Newton’s Olympics”.
  
  C. S8FE –Ib-17
   Demonstrate how a body responds to changes in motion.
   Infer that when a body exerts a force on another, an equal
  amount of force is exerted back on it.
  Learning Competencies / Objectives
  Objectives:
  Write the LC code for each
  1. State Newton’s Third Law of Motion
  2. Compare the two interacting forces in terms of magnitudes and
  directions.
  3. Identify the action and reaction forces in the given situations.
  
  ## Module I: FORCE AND MOTION
  
  II. CONTENT Lesson 6: THREE LAWS OF MOTION
  The Law of Interaction
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 13 - 16
  2. Learner's Materials Pages pp. 18 - 19
  3. Textbook Pages
  EASE Physics, Module 10. Lesson 3
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide G8 First Quarter pp. 23 - 25
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or
  
  Differentiate first law of motion to the second law of motion
  presenting the new lesson
  B. Establishing a purpose for the Lesson
  Imagine yourself leaning against a tree same with the picture below.
  Did you topple over while you are still in contact with the tree?
  Why or why not!
  
  new lesson
  
  ## D. Discussing new concepts and
  
  Do the activity in Lesson Guide G8 First Quarter pp 23 - 24 or
  practicing
  Learners’ Module pp 19 - 20
  new skills #1
  Analysis:
  Discussing new concepts and
  practicing
  What do these values represent?
  new skills #2
  2. How do you compare the direction of your partner’s and your
  force?
  4. How do you explain your observation?
  5. What is the reading in each balance?
  6. Compare the direction of the forces exerted on the two ends of
  the connected spring balance.
  
  ## Analyze the situations below by identifying the pairs of forces acting
  
  on the objects.
  
  F. Developing mastery
  
  Situation 1 Situation 2
  
  The class will be divided into small group. Each group is assigned to
  1 of the situations listed below. They will be given 1 minute to
  draw/paint the scene and another 30 seconds to position
  themselves. Challenge the students to guess the picture of the other
  G. Finding practical applications of group then ask them to identify the action-reaction forces present.
  concepts
  and skills in daily living a. walking
  
  ## 1. Based from the above activity state operationally the law of
  
  interaction.
  Making generalizations and
  H. 2. Why do forces come in pairs?
  abstractions
  3. Explain the condition on how to forces are equal in magnitude
  and acting in opposite direction.
  
  Direction: Read each sentence carefully and write the letter of the
  1. As a 500 N lady sits on the floor, the floor exerts a force on her
  equal to______________.
  A. 1000 N *B. 500 N
  C. 250 N D. 50 N
  
  ## 2. According to Newton's Third Law of Motion, when a hammer
  
  strikes and exerts a force on a nail, the nail
  A. creates a balanced force.
  B. disappears into the wood.
  C. moves at a constant speed.
  * D. exerts and equal and opposite force back on the hammer.
  
  ## 3. Pick the best example of Newton's Third Law in action.
  
  A. A rocket taking off from earth which pushes gases in one
  I. Evaluating Learning direction and the rocket in the other.
  *B. A rocket sitting on the ground preparing for take-off but it
  needs an outside force to overcome its inertia of a non-
  moving object.
  C. A rocket that is accelerating through space and exerts a
  great amount of force because its mass and acceleration is
  so large.
  D. Both b and c.
  
  ## 4. When a teacher stands at the front of the class, the force of
  
  gravity pulls her toward the ground. The ground pushes back
  with an equal and opposite force. This is an example of
  which of Newton's Laws of Motion?
  A. Law of Inertia
  B. Law of Acceleration
  *C. Law of Interaction
  D. Law of Universal Gravitation
  5. For every action there is an equal and opposite reaction. This is
  a statement of
  A. Newton's First Law of Motion.
  B. Newton's Second Law of Motion.
  *C. Newton's Third Law of Motion.
  D. Newton's Law of Action.
  J. Additional activities for application or Design and implement an experiment that will verify Newton’s Law
  remediation of Motion.
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored
  below 80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked
  well? Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did
  I
  Use or discover which I wish to share with
  other teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First
  Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of Newton’s three laws of
  
  A. Content Standards
  motion and uniform circular motion.
  The learner shall be able to develop a writer plan and implement a
  B. Performance Standards
  “Newton’s Olympics”.
  C. S8FE –Ib-18 /19
   Relate the laws of motion to bodies in uniform circular
  motion.
   Infer that circular motion requires the application of constant
  Learning Competencies / Objectives force directed toward the center of the circle.
  Write the LC code for each
  Objectives:
  1. Define circular motion
  2. Identify the factors affecting circular motion.
  3. Relate circular motion and Newton’s Law of Motion.
  
  ## II. CONTENT Module I: FORCES AND MOTION
  
  Lesson 7: Circular Motion And Newton’s Second Law Of Motion
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 13 - 16
  2. Learner's Materials Pages pp. 18 - 19
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide in Grade 8 – First Quarter pp. 26- 28
  
  IV. PROCEDURES
  
  A. Reviewing previous lesson or presenting Recall the second law of motion. How is the acceleration of the body
  the new lesson being affected by its mass.
  Try to whirl a stone tied to a string horizontally above your head.
  Then observe what happen if you release the object. How does it
  travel after release?
  
  which it pulled?
  
  ## C. How does gravity make satellites revolve at a constant speed? What
  
  Presenting examples / instances of the
  will happen if all of a sudden, the earth loses its gravitational pull on
  new lesson
  the satellites?
  D. Let the students watch the video on circular motion and its
  Discussing new concepts and practicing relationship to the second law of motion.
  
  E. Discussing new concepts and practicing From the video clip presented, how does circular motion related to
  new skills #2 the laws of motion. Discuss it in terms of change in velocity
  
  F. Developing mastery
  G. Finding practical applications of concepts
  Why are accidents more frequent along a curve path?
  and skills in daily living
  According to Newton’s second law of motion acceleration is
  produced by a net force. The net force and the acceleration must be
  in the same direction. From the second law, F = m a.
  If applied to uniform motion, the acceleration becomes the
  centripetal acceleration and the net force. Since it is also directed
  towards the axis of rotation, it becomes the centripetal force.
  Centripetal force can be defined as the net force on an
  object that maintains the object’s circular path and is directed
  towards the center of the circular path. The formula in calculating for
  the centripetal force is Fc = mac ,
  where: Fc = centripetal force (N)
  m = mass (kg)
  a = centripetal acceleration (m/s2)
  H. Making generalizations and abstractions
  about the lesson If using the tangential speed and angular speed the
  equation can be rewritten as:
  Fc = mv2 / r or mrώ
  
  Where:
  
  r = radius ( m )
  
  ## The centripetal force is the force that maintains the circular
  
  path of the objects. If the centripetal force is zero, the object will
  move in a straight line.
  
  Direction: read the questions below and select the letter of the best
  
  ## 1. What made the stone in the previous activity move in circular
  
  path?
  *A. The central force enables the stone to stay in its path.
  B. The gravity enables the stone to move in circular path.
  C. The force of attraction make its stay in place.
  D. The string made the stone to whirl in circular path.
  
  ## 2. This is a force that keeps an object move in circular path.
  
  A. frictional force
  *B. centripetal force
  C. gravitational force
  D. attractive force
  
  3. All are examples of events/ activities in our daily life which shows
  or illustrates the need of a central force. Which is not included in
  I. Evaluating Learning the group?
  A. merry-go-round
  B. banking on curved
  C. satellite moon
  *D. cyclist on the straight road
  
  ## 4. In what direction does an object fly if the force giving its
  
  centripetal acceleration suddenly disappear?
  A. The object continuously moves in circular motion,
  *B. The object moves in straight line at constant speed.
  C. The object changes its velocity in a straight path.
  D. Hard to determine where the object goes.
  
  5. When a car turns around a curve and its speed doubled, what
  happens to the force between the road and its wheels?
  A. It doubles
  *B. It increases four times
  C. It is reduced to one-half
  D. It is reduced to one-fourth
  Journal entry:
  Think and look for words and ideas that relate to the word on the
  box. Write the words and ideas on the lines around the box.
  J. Additional activities for application or
  remediation CENTRIPETAL FORCE
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored below
  80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with
  other teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First ( Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of work using constant
  
  force, power, gravitational potential energy, kinetic energy, and
  A. Content Standards
  elastic potential energy
  
  B. Performance Standards
  C. (S8FE-Ic-20)
  
  ##  Identify situations in which work is done and in which no
  
  work is done
  Learning Competencies / Objectives
  Write the LC code for each Objectives:
  
  ## 1.Define work scientifically
  
  2.Identify situations in which work is done and in which no work is
  done.
  
  ## II. CONTENT MODULE II: WORK, POWER AND ENERGY
  
  Lesson 8: WHAT IS WORK?
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages 18-19
  2. Learner's Materials Pages 21-23
  3. Textbook Pages
  Resource (LR) portal
  Lesson Guide Grade 8 First Quarter, pp. 29-30
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  State the Second Law of Motion
  new lesson
  
  ## Ask the students if they know the meaning of work. Emphasize
  
  B. Establishing a purpose for the Lesson
  to them that the meaning /definition of work and the one that
  we use in Science are quite different from each other.
  
  Simple Demonstration:
  
  ## Ask three students to demonstrate in the class the
  
  Presenting examples / instances of the
  C. new lesson a. Student 1 pushes the blackboard.
  b. Student 2 pulls a chair from one end of the room to the other
  end.
  c. Student 3 pulls a chair then return it to its original place.
  
  D.
  Discussing new concepts and practicing From the three demonstrations, which activity showed that
  new skills #1 work is done or no work done? Explain.
  
  ## Discussing new concepts and practicing
  
  E. new skills #2 Do the Activity on Is there work done?
  Lesson Guide Grade 8 First Quarter pp. 29-30
  
  Analysis:
  
  ## 1. Which of the four situations demonstrated or showed that work
  
  is
  done? Why?
  
  F. Developing mastery 2. Why do you think situation number 3 did not show that no work
  (Leads to Formative Assessment 3) is
  done? Why?
  
  ## 3. What is the effect of the force the object?
  
  4. How will you relate the force and the direction of the motion?
  
  ## Agree or Disagree !!!
  
  Ask the students to take a stand by showing thumbs up or thumbs
  down sign with the following statements.
  
  ## 1. Work does not necessarily mean physical labor.
  
  G. Finding practical applications of concepts 2. If there is displacement in the same direction of the force then
  and skills in daily living there is work automatically.
  3. Work done at a very limited time frame means there is high
  power output.
  4. If there is no force exerted, there won’t be any work output.
  5. If force and distance move at an angle there is work one.
  
  ## Work is present when the force exerted causes an object to have
  
  H. Making generalizations and abstractions
  a displacement in the same direction of the force.
  (You may use the picture on the lesson guide)
  Identify situations in which work is done and in which no work
  is done. Write W if the situation shows work and NW if no work.
  
  ## 1. Lifting a box from the floor.
  
  I. Evaluating Learning
  2. Pushing against the wall.
  3. Pushing a box along the floor.
  4. Carrying a bag of grocery
  5. Raising a flag during the flag ceremony
  How do you measure the amount of work done?
  Illustrate how to calculate work and determine the corresponding
  J. units work.
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## B. No. of learners who require additional activities
  
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First ( Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of work using constant
  
  force, power, gravitational potential energy, kinetic energy, and
  A. Content Standards
  elastic potential energy
  
  B. Performance Standards
  C. (S8FE-Ic-20)
  
  ##  Identify situations in which work is done and in which no
  
  Learning Competencies / Objectives work is done
  Write the LC code for each
  Objective;
  Calculate the amount of work done using appropriate units.
  
  ## Module Ii: WORK, POWER AND ENERGY
  
  II. CONTENT Lesson 9: CALCULATING WORK
  
  ## III. LEARNING RESOURCES
  
  A. References
  19 – 20
  1. Teacher's Guide Pages
  24 – 25
  2. Learner's Materials Pages
  
  3. Textbook Pages
  Resource (LR) portal
  Lesson Guide Grade 8 First Quarter, pp. 33-34
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  When do we say that work is done?
  new lesson
  Students will watch a short video clip on how to
  calculate the amount of work done on the object.
  B. Establishing a purpose for the Lesson
  
  ## Example of situational problems on work
  
  C. 1. A box is dragged horizontally across a floor by a 100 N
  Presenting examples / instances of the
  force acting parallel to the floor. What is the work done
  new lesson
  by the force in moving it through a distance of 8 m?
  
  ## D. Do the Activity on Calculating Work, Lesson Guide Grade 8
  
  Discussing new concepts and practicing
  First Quarter pp. 33-34
  new skills #1
  
  ## Work problems to be solved by pair
  
  1. A body moves through a distance of 4 m while a force F of 12
  Newton acts on it. What is the work done by the force on the
  Discussing new concepts and practicing
  body?
  new skills #2
  E.
  2.Two men exerted a force of 1080 N to push the car 218 m to
  the nearest fuel station. Determine the work done on the car.
  F. Developing mastery
  Discuss the answer on the given exercises
  Analyze the picture, Do you think that the man climbing upstairs
  demonstrate or performs work? Why?
  
  ## G. Finding practical applications of concepts
  
  and skills in daily living
  
  ## Work is said to be done when a body undergoes
  
  displacement. It is denoted by W. Work Formula is given
  by W = F . d
  where :
  H. Making generalizations and abstractions
  about the lesson F = force applied and
  d = displacement.
  Work formula is used to calculate work done, force or
  displacement in any problems. It is given in N-m.
  
  ## 1. How much work is required to lift a 2 kg mass to a height of 10
  
  meters?
  A. 5 J B. 20 J *C. !00 J D. 200
  J
  
  ## 2. A garden tractor drags a plow with the force of 500 N in a
  
  distance of 10 meters in 20 seconds. How much work is done?
  A. 0.25 J B. 1000 J C. 2599 J *D.
  5000J
  
  ## 3. One joule is equivalent to:
  
  A. 1 N.m3 B. 1 kg.m3 C.1 watt2 .N *D. 1 kg.m2 /s2
  
  ## 4. Which of the following 10 N forces acting over 10 m would
  
  produce the most work?
  
  30 degrees 45 degrees
  I. Evaluating Learning
  A B
  
  45 degrees Horizontal
  C *D
  
  ##  Both students run up the stairs at constant velocities.
  
   Student A takes twice as long as student B to climb the
  stairs.
   Student A weighs twice as much as student B
  
  ## I. Student A develops more power than student B.
  
  II. Student B does more work than student A.
  III. The change in potential energy of student A is twice that of
  student B.
  A. I only *B. III only
  C. I and II only D. I and III only
  
  J. Additional activities for application or Why is work considered a method of transferring energy?
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## B. No. of learners who require additional activities
  
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First ( Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of work using
  
  constant force, power, gravitational potential energy, kinetic
  A. Content Standards
  energy, and elastic potential energy
  
  B. Performance Standards
  C. (S8FE-Ic-20)
  
  ##  Identify situations in which work is done and in which
  
  no work is done
  Learning Competencies / Objectives
  Objectives:
  Write the LC code for each
  1.Describe the energy changes when energy is transferred
  from one body to another.
  
  ## Module II: WORK, POWER AND ENERGY
  
  II. CONTENT Lesson 10: Work Is A Method Of Transferring Energy
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages 20-21
  2. Learner's Materials Pages 25-26
  3. Textbook Pages
  Resource (LR) portal
  Lesson Guide Grade 8 First Quarter pp 37-38
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  How will you compute the amount of work done by an object?
  new lesson
  Energy enable us to do work. It is likened to
  money. Having a lot of energy is like having plenty of money.
  But having money is not enough to do useful things. Money
  B. Establishing a purpose for the Lesson should be handed over to another person so it can do
  something. Energy is also like this. It needs to be transferred
  to another body so it can do something useful.
  
  ## Examples of situation that shows transfer of energy:
  
  1.When you push a book across the table, the energy from
  C. Presenting examples / instances of the causing the book to move.
  new lesson 2. Fingers hitting piano keys transfer energy from the player’s
  hand to the keys.
  
  D. Discussing new concepts and practicing Do the Activity - Lesson Guide Grade 8 First Quarter pp 37-38
  new skills #1
  Analysis:
  1. Is there work done on the ball?
  E. Discussing new concepts and practicing
  new skills #2 2. What can a moving ball do when it interacts with other
  object?
  3. What happens to the energy of the ball (doing the work) and
  the
  F. Developing mastery
  Discuss the answers in the given activity
  Cite other examples of energy transfer in your daily life
  G. Finding practical applications of concepts situations.
  and skills in daily living
  
  ## When energy is transferred, one body loses energy, where as
  
  another gains it.Work is a method of energy transfer.
  When a body does work, it loses energy. The body on which
  H. Making generalizations and abstractions work is done gains energy.
  about the lesson Examples of energy transfer are:
  a. A spring vibrates after being stretched
  b. A bicycle going uphill, which stops.
  
  ## a. A monkey climbing a tree
  
  b. A person in an ascending elevator
  c. A weight lifter lifting a barbell in the air
  d. A stone whirled around the horizontal circle
  
  2. Describe the energy changes that take place when the ball
  is
  thrown upward.
  a. Potential to Kinetic
  b. Kinetic to Potential
  c. Both a and b
  d. Cannot be determined
  
  ## 3. What happens to energy when it is transferred from one
  
  I. Evaluating Learning
  body to
  another?
  a. Energy is gained.
  b. Energy is destroyed.
  c. It loses energy.
  d. Both a and c
  
  ## 4. A ball with mass of 2 kg is dropped from a height of 60 m.
  
  What is
  the potential energy of the ball? Assume that the reference
  position is the ground.
  
  ## 5. A book weighs 5.0 newtons when it is raised 1.5 meters.
  
  Calculate its increase in potential energy.
  
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## B. No. of learners who require additional activities
  
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  
  DAY: Tuesday
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of work using constant
  
  force, power, gravitational potential energy, kinetic energy, and
  A. Content Standards
  elastic potential energy
  
  B. Performance Standards
  (S8FE-Ic-21)
  
  ##  Describe how work is related to power and energy
  
  Learning Competencies / Objectives
  C. Objectives:
  Write the LC code for each
  1. Describe how work is related to power and energy.
  2. Compute for your power output in walking or running up a
  flight of stairs
  
  ## Module II: WORK, ENERGY AND POWER
  
  II. CONTENT Lesson 11: HOW POWER-FUL AM I?
  
  ## III. LEARNING RESOURCES
  
  A. References
  23-24
  1. Teacher's Guide Pages
  34-35
  2. Learner's Materials Pages
  
  3. Textbook Pages
  Resource (LR) portal
  Lesson Guide Grade 8 First Quarter, pp. 40-41
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  Differentiate potential form kinetic energy
  new lesson
  Video Presentation
  
  ## Showing a short video clip about sport Triathlon
  
  B. Establishing a purpose for the Lesson
  
  ## Ask the students to explain if there is work done by the athletes
  
  Presenting examples / instances of the participating in the said event.
  C.
  new lesson
  Ask them also if they use energy.
  
  D. Discussing new concepts and practicing Do the Activity on How POWER-ful am I, Lesson Guide Grade 8
  new skills #1 First Quarter, pp. 40-41
  
  ## E. Name Weight Height Time taken Energy
  
  (N) of stairs to climb the Expended Power
  Discussing new concepts and practicing (m) stairs ( s ) (J) ( J/s )
  new skills #2
  Q1. Who among the group members had the highest power
  output?
  Q2. What is the highest power output?
  Q3. Who among the group members had the lowest power
  output?
  Q4. What is the lowest power output?
  Q5. What can you say about the work done by each member of
  the group?
  Q6. Did each member perform the same amount of work in
  climbing the stairs?
  Q7. What factor/s determined the highest/lowest power output?
  
  F. Developing mastery
  Discuss the answers in the given activity
  
  ## G. Finding practical applications of concepts
  
  If you were be given a chance to be the leader of the our
  and skills in daily living
  country, how would you exercise your power of authority?
  
  ## Power provides a measure of both the amount of work done
  
  or the amount of energy expended and the time it takes to do it.
  If you do a physical task quickly you have more power than when
  you do the same task slowly.
  
  ## In science, power is defined as the rate at which work is
  
  done or the rate at which energy is expended, or is transferred,
  or transformed. In equation,
  Making generalizations and abstractions
  H. Power = work/time
  or
  Power = energy/time
  What is the SI unit of power? Since the SI unit of work is
  joule and the SI unit of time is second, the SI unit of power is
  Joule/second. This is given a special name,
  watt, in honor of James Watt. So, 1 watt (W) = 1 joule
  (J)/second (s)
  
  ## 1. Which of the following statements indicates the best way to
  
  increase power?
  *A. increase the amount of work done in a given amount of
  time, or do a given amount of work in less time
  B. increase the amount of work done in a given amount of
  time, or do a given amount of work in more time.
  C. decrease the amount of work done in a given amount of
  time, or do a given amount of work in less time .
  D. decrease the amount of work done in a given amount of
  time, or do a given amount of work in more time.
  
  ## 2. What does the power of a machine measures?
  
  A. the work it does
  *B. its rate of doing work
  C. the force it produces
  D. its strength
  I. Evaluating Learning
  3. A girl carries a heavy suitcase quickly up a flight of stairs. A
  boy of the same weight carries the same suitcase slowly up
  the flight of stairs. Which statement is true?
  A. The girl did less work and had less power than the boy.
  B. The girl had less power than the boy.
  C. The girl did more work and had more power than the boy.
  *D. The girl had more power than the boy
  
  ## 4. What is the power develop by a jumbo jet that cruises at 200
  
  m/s when the thrust of its engine is 100,000 N?
  A. 20,000 W B. 200,000W
  C. 20,000,000W D. 2000 W
  
  ## 5. The following the units to express power. Which is not
  
  included?
  A. N.m/s B. J/s C. watt D. N.m/s2
  1. What are the different forms energy?
  J. Additional activities for application or
  remediation 2. What are the types of mechanical energy?
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## A. No. of learners who earned 80% in the evaluation
  
  B. No. of learners who require additional activities
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First ( Physics)
  Time
  
  DAY: Tuesday
  1. Define kinetic energy.
  2.Relate the speed and position of object to the amount of energy
  I. OBJECTIVES
  possessed by a body.
  3. Calculate the kinetic energy of a moving body.
  The learner demonstrates understanding of work using constant
  force, power, gravitational potential energy, kinetic energy, and
  A. Content Standards
  elastic potential energy
  
  B. Performance Standards
  C. (S8FE-Id--22) (S8FE-Id-23)
  
  ##  Differentiate potential and kinetic energy.
  
   Relate speed and position of object to the amount of
  energy possessed by a body.
  Learning Competencies / Objectives
  Write the LC code for each Objectives:
  1. Define kinetic energy.
  2.Relate the speed and position of object to the amount of energy
  possessed by a body.
  3. Calculate the kinetic energy of a moving body
  
  ## Module II: WORK, POWER AND ENERGY
  
  II. CONTENT Lesson 12: KINETIC ENERGY
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages 21
  2. Learner's Materials Pages 26-28
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide Grade 8 First Quarter, pp 43-44
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  How will you define power?
  new lesson
  Picture Analysis:
  
  ## B. Establishing a purpose for the Lesson
  
  C. Presenting examples / instances of the What kind of energy does the boy possess? Explain your answer.
  new lesson
  D. Discussing new concepts and practicing Do the Activity on Exploring kinetic energy with ramps,
  new skills #1 Lesson Guide Grade 8 First Quarter, pp 43-44
  E. Analysis:
  Discussing new concepts and practicing
  1. Which car will run fastest? Why do you think so?
  new skills #2
  2. How does the amount of energy possessed by each car
  affect its speed?
  
  F. Developing mastery
  Discuss the answers in the activity given.
  How do kinetic energy applies to everyday life?
  
  ## 1.a running roller coaster
  
  2.your jaw when you are chewing
  3.when playing billiard, the energy is transferred from the stick to
  G. Finding practical applications of concepts a
  and skills in daily living ball
  4.A Slinky moving down a set of steps
  5.Snow skis gliding down the mountain
  6.Gas molecules moving around in a room
  
  ## The kinetic energy of an object is the energy that it
  
  possesses due to its motion. It is defined as the work needed to
  accelerate a body of a given mass from rest to its stated velocity.
  Having gained this energy during its acceleration, the body
  maintains this kinetic energy unless its speed changes.
  If the masses {weights} are equal, the body with the
  greatest velocity {speed} would have the highest kinetic energy. If
  the velocities are equal, the body with the greatest mass would
  have the highest kinetic energy.
  The kinetic energy of an object is given by the equation:
  
  ## H. KE = 1/2mv2, where m is the mass of the object and v is
  
  Making generalizations and abstractions
  its velocity.
  The kinetic energy is proportional to the mass of the
  object.
  According to Newton’s second law, F = ma, an object is
  accelerated with a constant acceleration of a constant net force is
  exerted on it. The work done on object is given by:
  
  ## W = F. d. Thus the work done is W = (ma)d. Assume the
  
  object was originally at rest, Vi = 0. As it accelerates, v2 =
  2
  2ad, or d = v / 2a, since a is constant.
  = ma (v2 / 2a)
  = 1/2mv2
  Assessment:
  
  ## 1. When work that is done on a body increases its
  
  velocity, then, there is an increase in the kinetic energy
  of the body.
  I. Evaluating Learning 2. The kinetic energy of a more massive object at rest is
  greater than that of a less massive moving object.
  3. If the velocity of a moving object is doubled, its kinetic
  energy is also doubled.
  4. The unit of kinetic energy is the same as the unit of
  work.
  5. The unit kg m2/s2 is also a unit of energy.
  
  J.
  Additional activities for application or What is potential energy?
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## A. No. of learners who earned 80% in the evaluation
  
  B. No. of learners who require additional activities
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of work using constant
  
  force power, gravitational potential energy, kinetic energy, and
  A. Content Standards
  elastic potential energy
  
  B. Performance Standards
  C. (S8FE-Id--22) (S8FE-Id-23)
  
  ##  Differentiate potential and kinetic energy.
  
   Relate speed and position of object to the amount of
  energy possessed by a body.
  Learning Competencies / Objectives
  Write the LC code for each Objectives:
  
  ## 1. State the meaning of potential energy.
  
  2. Relate potential energy to work
  3. Calculate the change in potential energy of a body
  
  ## Module II : WORK, POWER AND ENERGY
  
  II. CONTENT
  Lesson 13: POTENTIAL ENERGY
  
  ## III. LEARNING RESOURCES
  
  A. References
  21-22
  1. Teacher's Guide Pages
  28-33
  2. Learner's Materials Pages
  
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide Grade 8 First Quarter, pp 47-49
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  What is kinetic energy? Give the formula of kinetic energy
  new lesson
  
  Present the video to the class and have them watch the video
  Establishing a purpose for the Lesson
  
  ## C. After watching the video let the students brainstorm on what
  
  they have viewed. Ask them: “What science concepts are
  Presenting examples / instances of the
  involved in the roller coaster? “Today, we will deal more on the
  new lesson
  energy possessed by the roller coaster.”
  
  ## D. Do Activity on Rolling Toy - Lesson Guide Grade 8 First Quarter
  
  Discussing new concepts and practicing pp 47-49
  new skills #1
  
  E. Analysis:
  
  ## Q1. What happens to the toy?
  
  Discussing new concepts and practicing Q2. What kind of energy is ‘stored’ in the rubber band?
  new skills #2 Q3. What kind of energy does a rolling toy have?
  Q4. What transformation of energy happens in a rolling toy?
  
  F. Developing mastery
  Discuss the answers in the activity given
  G.
  Finding practical applications of concepts Actor and actress of the day
  and skills in daily living
  Ask 5 learners to give example of potential energy then
  each them will act the given situations. The audience will
  determine if the action taken by the actor/actress is example of
  potential energy.
  
  ## H. Potential energy, or stored energy, is the ability of a
  
  system to do work due to its position or internal structure. For
  example, gravitational potential energy is a stored energy
  determined by an object's position in a gravitational
  field while elastic potential energy is the energy stored in a
  spring.
  
  ## As a form of energy, the SI units for potential energy are
  
  the joule (J) or Newton-meter (N*m).
  Making generalizations and abstractions
  The change in the object’s gravitational potential energy
  is the work done in raising it to that height. Since the work done
  on the object to raise it at that height is given by the equation,
  W = mgh then, the change in the object’s gravitational potential
  energy is ΔPE = mgh where h = the height above the reference
  level. If the object is raised from the ground, the reference level
  is the ground. If the object, however, is raised from the table, the
  table is the reference level.
  (Note: The teacher may the previous activity on power to
  gravitational potential energy)
  
  Direction: Read the questions below and choose the letter of the
  
  ## 1. A roller coaster climbing the first hill is an example of
  
  A. building kinetic energy.
  *B. building potential energy.
  C. gravitational forces.
  D. nuclear energy.
  
  energy is?
  A. Newton
  *B. Joule
  C. Meter
  D. Liter
  
  ## 3. A stationary object may have
  
  I. Evaluating Learning *A. potential energy
  B. velocity
  C. kinetic energy
  D. acceleration
  
  ## 4 . A 50 kilogram object is located 5 meters above the
  
  ground level. Find its potential energy.
  *A. The object's potential energy is 2450 J.
  B. The object's potential energy is 24.50 J.
  C. The object's potential energy is 2.450 J.
  D. The object's potential energy is 245.0 J.
  
  ## 5. A 12 kg cat who is resting on a tree has a potential
  
  energy of 50 Calculate its position (height) relative to the
  ground.
  A. The cat is located 0.43 m above the ground.
  *B. The cat is located 0.43 m above the ground.
  C. The cat is located 0.43 m above the ground.
  D. The cat is located 0.43 m above the ground.
  J. Journal entry:
  Additional activities for application or Write a short paragraph on how potential and kinetic energy is
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## A. No. of learners who earned 80% in the evaluation
  
  B. No. of learners who require additional activities
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date
  Quarter First (Physics)
  and Time
  DAY:
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of the propagation of
  
  A. Content Standards
  sound through solid, liquid and gas.
  B. Performance Standards
  C. S8FE –Ie-24
   Infer how the movement of particles of an object affect the
  Learning Competencies / Objectives speed of sound through it.
  Write the LC code for each
  Objective:
  Infer that sound consists of vibrations that travel through the air.
  
  ## Module III: SOUND
  
  II. CONTENT
  Lesson 14: PROPAGATION OF SOUND
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 49 - 51
  2. Learner's Materials Pages pp. 71 – 73
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide G8 First Quarter pp. 52 - 54
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or
  
  Differentiate kinetic from potential energy.
  presenting the new lesson
  Guessing game:
  
  ## Let the students guess the answer to the question, “ What is a
  
  vibration produced by a vibrating body”. They may decode the term
  by dialing the numbers 76863, in the keypad below.
  C ABC DEF
  B. Establishing a purpose for the Lesson 2 3
  GHI JKL MNO
  4 5 6
  PQRS TUV WXYZ
  7 8 9
  
  0
  C. Presenting examples / instances of the Why do sound vibrates?
  new lesson How does it travel through space?
  D. Discussing new concepts and
  practicing Do the activity on Sound, Lesson Guide G-8 First Quarter pp. 52-53
  new skills #1
  
  ## Q1. What is the purpose of tapping the tuning fork to a wood or
  
  rubber sole?
  Q2. What causes sound?
  Q3. What happens to the loudness as you move the tuning fork from
  Discussing new concepts and
  E. up and down?
  practicing
  Q4. Can sound be transmitted if there is no matter to form a
  new skills #2
  medium?
  Q5. How is sound created and transmitted?
  Q6. What property of a sound wave determines the pitch of a
  sound?
  
  F. Developing mastery
  Discuss the answers in the activity given.
  How do you know that there is an approaching train? If you
  G. Finding practical applications of are living near a railway, how does it affect your emotion?
  concepts
  and skills in daily living
  H. Sound waves are produced by vibrating objects. They are
  Making generalizations and
  propagated through a medium from the source. Sound waves are
  abstractions
  longitudinal waves. Particles of the medium vibrate in the direction
  of wave motion.
  Write TRUE if the statement is correct and FALSE if the statement is
  wrong.
  1. Sound is a mechanical waves propagating in space.
  2. Sound does not need a medium to propagate.
  I. Evaluating Learning
  3. Sound wave is a longitudinal wave.
  4. Particles of the medium vibrate in the direction of wave
  motion.
  5. Sound carries energy.
  Bring the following materials by group for the next activity:
  1 dowel or 1 wooden rod
  3 inches of tape
  J. Additional activities for application or 2 large books
  remediation scissors
  5 pieces of string
  paper
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored
  below 80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked
  well? Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did
  I
  Use or discover which I wish to share with
  other teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date
  Quarter First (Physics)
  and Time
  DAY:
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of the propagation of
  
  A. Content Standards
  sound through solid, liquid and gas.
  B. Performance Standards
  C. S8FE –Ie-24
   Infer how the movement of particles of an object affect the
  speed of sound through it.
  Learning Competencies / Objectives
  Write the LC code for each
  Objective:
  At the end of the activity, learners will be able to infer that sound is
  transmitted in air through vibrations of air particles
  Module III: SOUND
  II. CONTENT Lesson 15: PROPAGATION OF SOUND
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 49 - 51
  2. Learner's Materials Pages pp. 71 – 73
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide G8 First Quarter pp. 55 - 58
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or What is sound wave?
  
  presenting the new lesson How is sound produced?
  
  B. Establishing a purpose for the Lesson How do you communicate to your love ones miles away from you?
  
  ## C. Presenting examples / instances of the
  
  new lesson
  
  If you flock the string of the guitar one by one how do the sound
  differs?
  
  ## D. Discussing new concepts and
  
  Do the activity on Transmitting Sound, Lesson Guide G-8 First
  practicing
  Quarter pp. 55-56
  new skills #1
  1. What happens to the other colored beads when the blue bead is
  E. Discussing new concepts and tapped?
  practicing 2. Are there occasion when the beads converge then expand?
  new skills #2 3. Are there converging and expanding parts of the slinky?
  4. How then is sound classified as a wave?
  F. Developing mastery
  Discuss the answers in the activity given.
  G. Why are sound important in:
  Finding practical applications of
   Communication
  concepts
   Signaling system
  and skills in daily living
   Music
  H. Making generalizations and The material through which sound travels is known as the medium.
  abstractions The medium can be a solid, liquid, or a gas. Sound needs a medium
  about the lesson to travel. It cannot travel through vacuum.
  Direction : Choose the letter of the correct answer.
  
  1. Sound is an example of
  I. Evaluating Learning *A. a longitudinal wave.
  B.. a wave that can travel through a vacuum.
  C. a transverse wave.
  D. a wave that does not transmit energy.
  2. When sound travel through air, the air particles_______.
  *A. vibrate along the direction of wave propagation
  B. vibrate but not in any fixed direction
  C. vibrate perpendicular to the direction of wave propagation
  D. do not vibrate
  3. Sound is produced due to _____
  A. Friction B. circulation
  *C. vibration D. refraction
  
  ## 4 Sound passes from one place to another in the form of
  
  A. Rays *B. waves
  C. energy D. light
  
  ## 5. Sound waves have
  
  A. Amplitude only
  B. Frequency and wavelength only
  *C. Amplitude, frequency and wavelength
  D. Amplitude and wavelength only
  
  • Frequency
  • Amplitude
  J. • Pitch
  • Loudness
  remediation
  • Intensity
  • speed
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored
  below 80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked
  well? Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did
  I
  Use or discover which I wish to share with
  other teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date
  Quarter First
  and Time
  DAY:
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of the propagation of
  
  A. Content Standards
  sound through solid, liquid and gas.
  B. Performance Standards
  C. S8FE –Ie-24
   Infer how the movement of particles of an object affect the
  speed of sound through it.
  Learning Competencies / Objectives
  Objectives:
  Write the LC code for each
  1.Distinguish the different characteristics of waves;
  2. Determine their frequency and wavelength; and
  3. Compute the wave speed based on the frequency and
  wavelength
  Module III: SOUND
  II. CONTENT
  Lesson 16: CHARACTERISTICS OF SOUND
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 51 - 52
  2. Learner's Materials Pages pp. 75 – 77
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide G8 First Quarter pp. 58 - 61
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or
  
  Differentiate the propagation of sound in solid, liquid and in gas
  presenting the new lesson
  
  ## Students will be asked to produce sound by:
  
   whispering,
  B. Establishing a purpose for the Lesson
   singing, and
   shouting.
  C. Presenting examples / instances of the
  Ask them how sound differ in the three situation.
  new lesson
  D. Discussing new concepts and
  Do the activity on , Lesson Guide G-8 First Quarter pp. 58-59 or
  practicing
  LM pp75 -77
  new skills #1
  
  1. When there are more waves passing through the reference point
  Discussing new concepts and in a period of time, which wave characteristic also increases?
  E. practicing
  new skills #2 2. When there are more waves passing through the reference point
  in a period of time, what happens to the wavelength of the
  waves?
  F. Developing mastery
  Discuss the answers in the activity given.
  G. Finding practical applications of Discuss the importance of Doppler effect in daily occurrences.
  concepts and skills in daily living
   Sound differ from one another in loudness, intensity, pitch and
  quality. Sound waves have frequency, wavelength and speed.
  H.  Loudness depends on the amplitude of vibration.
   Intensity depends on the amplitude of vibration and the area of
  Making generalizations and vibrating body perpendicular to the direction of wave motion.
  abstractions  Pitch depends on the frequency of vibration. Pitch is the
  about the lesson frequency of a sound as perceived by human ear. A high
  frequency gives rise to a high pitch note and a low frequency
  produces a low pitch note. Figure 2 shows the frequencies of
  same common sounds. The pitch of sound goes up and down.
   Sound quality distinguishes one sound from another.
  
  I. Evaluating Learning Word search: Find word or words that are related to sound
  A A P I T C H L L M I
  X X D G H J I L S X X
  S S S D F G H D D D D
  Q I N T E N S I T Y Q
  W E W E R O O H K K Q
  L O U D N E S S I I Q
  T Y R D G F D H H J Q
  O O K K Q U A L I T Y
  C F R E Q U E N C Y R
  1. Differentiate the speed of sound in three medium
  
  ## J. Additional activities for application or a. solid
  
  remediation b. liquid
  c. gas
  see also the list of materials for the next activity (LM pp. 78)
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored
  below 80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked
  well? Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did
  I
  Use or discover which I wish to share with
  other teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date
  Quarter First (PHYSICS)
  and Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of the propagation of
  
  A. Content Standards
  sound through solid, liquid and gas.
  B. Performance Standards
  C. S8FE –Ie-24
   Infer how the movement of particles of an object affect the
  speed of sound through it.
  Learning Competencies / Objectives
  Write the LC code for each
  Objective:
  At the end of the activity, you will be able to distinguish which
  material transmits sound the best.
  Module III: SOUND
  II. CONTENT
  Lesson 17: SPEED OF SOUND
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 52 - 53
  2. Learner's Materials Pages pp. 78 – 80
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide G8 First Quarter pp. 62 - 65
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or
  
  Differentiate the different characteristics of sound.
  presenting the new lesson
  Place your ear against one end of a tabletop. Ask a friend
  to gently tap the other end of the table with a pencil or a ruler. What
  B. Establishing a purpose for the Lesson happens? Then ask your friend to gently tap the other end of the
  table but this time make sure that your ear is above the other end of
  the table. What happens?
  C. On which situation did you encounter louder and more
  Presenting examples / instances of the
  pronounced sound? On which situation did you encounter the sound
  new lesson
  earlier?
  D. Discussing new concepts and Do the activity on Sound Race.. Where does Sound Travel Fastest?,
  practicing Lesson Guide G-8 First Quarter pp. 62 - 63 or
  new skills #1 LM pp. 78 -79
  1. Did you hear the watch tick when you held it at arm's length?
  When you held it against the wooden dowel?
  When you held it against the metal rod?
  
  2. Did you hear the mobile phone vibrate when you held it at arm's
  length? When you held it against the wooden dowel? When you
  held it against the metal rod?
  
  ## 3. Based on your observations, which is a better carrier of sound?
  
  Air or wood? Air or water? Air or metal? Water or metal?
  E.
  4. How did the sound of the spoon change when the string was held
  Discussing new concepts and
  practicing
  5. When the ringing of the spoon was too quiet to be heard through
  new skills #2
  the air, could it be heard through the string?
  
  ## 9. Why does sound travel fastest in solids and slowest in air?
  
  10. Do you have any idea what makes sound move fast in solids?
  ( Note: If there is still time teacher may present a video clip on the
  F. Developing mastery
  
  ## G. If you will make an improvised toy telephone to be given to your
  
  Finding practical applications of
  baby brother or sister, what are the best materials for the toy
  concepts
  and skills in daily living telephone to have a very clear voice transmission
  
  Why does sound travel faster in solids than in liquids, and faster in
  liquids than in gases (air)?
  
  ## Sound is nothing more than a local disturbance whose propagation
  
  is facilitated by the collisions between particles; this disturbance
  propagates in a longitudinal wave; imagine one molecule hitting the
  next molecule, and then that molecule hitting the next, and so forth.
  Making generalizations and
  H. The distances between molecules in solids are very small, i.e.,
  abstractions
  solids are denser - as compared to liquids and gases. Because they
  are so close, than can collide very quickly, i.e. it takes less time for a
  molecule of the solid to 'bump' into its neighbor. Solids are packed
  together tighter than liquids and gases, hence sound travels fastest
  in solids. The distances in liquids are shorter than in gases, but
  longer than in solids. Liquids are more dense than gases, but less
  dense than solids, so sound travels 2nd fast in liquids. Gases are
  the slowest because they are the least dense: the molecules in
  gases are very far apart, compared with solids and liquids.
  
  Direction: Read the following and write the best letter of your choice.
  
  1. Sound waves travel faster in water than in air because water has
  a greater ___________.
  A. density.
  * B. elasticity.
  C. number of molecules.
  D. volume.
  2. When a wave travels through a medium_____.
  A. particles are transferred from one place to another
  B. energy is transferred in a periodic manner
  *C. energy is transferred at a constant speed
  D. none of the above statements is applicable
  
  ## 3. When sound travels through air, the air particles ______.
  
  *A. vibrate along the direction of wave propagation
  B. vibrate perpendicular to the direction of wave
  I. Evaluating Learning
  propagation
  C. vibrate perpendicular to the direction of wave
  propagation
  D. do not vibrate
  
  A. solid
  B. liquid
  C. gases
  D. vacuum
  
  ## 5. The method of detecting the presence, position and direction of
  
  motion of distant objects by reflecting a beam of sound waves is
  known as _____.
  
  C. MIR D. CRO
  
  ## J. Prepare a table indicating the different temperature of the medium
  
  (solid, liquid and gas) and the speed of sound.
  remediation
  
  V. REMARKS
  
  ## A. No. of learners who earned 80% in the
  
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored
  below 80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked
  well? Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did
  I
  Use or discover which I wish to share with
  other teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of the propagation of
  
  A. Content Standards
  sound through solid, liquid and gas.
  B. Performance Standards
  C. S8FE-Ie-25
   Investigate the effect of temperature to speed of sound
  Learning Competencies / Objectives through fair testing
  Write the LC code for each
  Objective:
  Determine how temperature affects the speed of sound.
  Module III: SOUND
  II. CONTENT Lesson 17: EFFECT OF TEMPERATURE TO THE
  SPEED OF SOUND
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 53
  2. Learner's Materials Pages pp. 82 - 85
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide G8 First Quarter pp. 66 - 69
  
  IV. PROCEDURES
  
  A. Reviewing previous lesson or presenting Why does sound travel faster in solids than in liquids, and faster in
  the new lesson liquids than in gases (air)?
  Picture Analysis:
  
  ## Figure 1 shows how sound waves varies during the day
  
  and during the night
  Look closely the picture, any similarities and differences that
  you can give about the picture? Let the students point out their
  C. Presenting examples / instances of the How about the arrow on the picture, what does it tell about
  new lesson sound?
  Now, let us find what happens to the speed of sound when
  the temperature changes? Be ready for our activity.
  
  Discussing new concepts and practicing Do the activity on Faster sound… In hotter or cooler?
  D. new skills #1 Lesson Guide G-8 First Quarter pp. 67 or LM pp. 83- 84
  
  E.
  1. Which cylinder gave the loudest sound?
  2. Which cylinder gave the highest pitched sound?
  3. If pitch is directly dependent on frequency, then, which
  Discussing new concepts and practicing
  cylinder gives the highest frequency sound?
  new skills #2
  4. Since wave speed is directly dependent on frequency, then,
  which cylinder gives the fastest sound?
  5. How would you relate the temperature of the medium with the
  speed of sound?
  F. Developing mastery Discuss the answers in the activity given.
  G. Finding practical applications of concepts Why do we hear loud sound of music on a hot day than on rainy
  and skills in daily living day?
  Temperature is a condition that affects the speed of sound.
  Heat, like sound, is a form of kinetic energy. Molecules at higher
  temperatures have more energy, thus they can vibrate faster. Since
  the molecules vibrate faster, sound waves can travel more quickly.
  The speed of sound in room temperature air is 346 meters per
  second. This is faster than 331 meters per second, which is the
  speed of sound in air at freezing temperatures. For every degree
  rise in temperature, the increase in the speed of sound is 0.6m/s. At
  00C, the speed of sound in air is 331m/s. At 10C, the speed will
  become 331.6m/s. This is determined by the use of the equation:
  
  v = 331m/s + (0.6m/s0C) T
  
  ## where v is the speed of sound
  
  T is the temperature of the air.
  At a temperature of 10C
  V = 331m/s + (0.6m/s0C) (10C)
  V = 331.6 m/s.
  
  Speed of Sound
  
  343.6 m/s
  
  330.4 m/s
  
  ## From the above figure, notice that the speed of sound
  
  varies directly with the temperature-as the temperature increases,
  the speed of sound also increases.
  
  ## One thing to keep in mind is that this formula finds the
  
  average speed of sound for any given temperature. The speed of
  sound is also affected by other factors such as humidity and air
  pressure.
  
  ## Direction: Choose the letter of the correct answer.
  
  1. How would you relate the temperature of the medium with the
  speed of sound?
  A. The higher the temperature, the faster the sound travels.
  B. The higher the temperature, the slower the sounds travel.
  C. The lower the temperature, the faster the sound travels.
  D. The lower the temperature, the slower the sound travels.
  
  ## 2. What is the speed of the sound in air of 250 C temperature?
  
  A. 336m/s B. 325m/s
  C. 346m/s D. 355m/s
  I. Evaluating Learning
  3. Calculate the speed of sound if the temperature of the vibrating
  water is 28°C?
  A. 346m/s B. 347.8m/s
  C. 350m/s D. 349.1m/s
  
  ## 4. In which of the following will the movement of particles be the
  
  fastest?
  A. 30°C of water B. 50°C of water
  C. 70°C of water D. 90°C of water
  
  ## 5. Which of the following quantities tells how hot or cold an object is
  
  with respect to some standard?
  A. Density B. Mass
  C. Pressure D. Temperature
  J. Additional activities for application or
  What are the properties of sound?
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored below
  80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with
  other teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and Quarter First (Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of the propagation of
  
  A. Content Standards
  sound through solid, liquid and gas.
  B. Performance Standards
  C. S8FE-Ie-25
   Investigate the effect of temperature to speed of sound
  Learning Competencies / Objectives through fair testing
  Write the LC code for each
  Objective:
  Observe how sound waves reflect and refract.
  Module III: SOUND
  II. CONTENT
  Lesson 19: PROPERTIES OF SOUND
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 53 - 54
  2. Learner's Materials Pages pp. 85 - 89
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide G8 First Quarter pp. 70 - 76
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting
  
  How does the temperature affect the speed of sound?
  the new lesson
  Why do lots of people love to sing inside the bathroom?
  (possible answers: because of privacy; hard wall surfaces of the
  B. Establishing a purpose for the Lesson
  bathroom bring about multiple reflection of sound that create
  pleasing sound; echoes are produce)
  Why do you think open field concerts are usually held during
  nighttime?
  Presenting examples / instances of the
  C. new lesson
  (possible answer: Sound is heard well in far areas during nighttime
  that daytime).
  
  D. Discussing new concepts and practicing Do the activity on Properties of Sound, Lesson Guide G-8 First
  new skills #1 Quarter pp. 74- 76
  
  ## Station 1: Reflection of Sound Waves
  
  Questions:
  
  1. Compare the clearness of sound without the book and with the
  book as barrier.
  
  ## E. 4. Give example of a reflected sound.
  
  Discussing new concepts and practicing
  5. How is echo differentiated from reverberation?
  new skills #2
  Station 2: Refraction of Sound Waves
  
  Questions:
  
  ## 1. What happens to the loudness of the sound produced by the
  
  if it is in front of the electric fan? Explain your answer.
  
  ## 2. If the radio is against the electric fan, what happens to the
  
  loudness
  of the sound? Why?
  
  ## Use the concept of reflection and
  
  refraction to explain the pictures
  
  G.
  Finding practical applications of concepts
  and skills in daily living
  
  ## Waves have some common properties. The study of the properties
  
  of sound waves is called acoustics. Sound waves are reflected when
  they hit a barrier.
  
  ## Reflection of sound waves off of surfaces is also affected by the
  
  shape of the surface. A flat or plane surfaces reflect sound waves in
  such a way that the angle at which the wave approaches the surface
  equals the angle at which the wave leaves the surface.
  
  ## Reflection of sound waves off of surfaces can lead to one of two
  
  phenomena - an echo or a reverberation. Multiple reflections are
  called reverberation. A reverberation often occurs in a small room
  with height, width and length dimensions of approximately 17 meters
  or less. This best fits the bathroom which enhances the voice.
  
  ## Refraction of sound on the other hand is describe as the change in
  
  speed of sound when it encounters a medium of different density.
  Sound travels faster in hotter media. This change in speed of sound
  Making generalizations and abstractions
  H. during refraction is also manifested as sort of “bending” of sound
  waves.
  
  ## Figure 2 Refraction of sound waves
  
  I. Evaluating Learning Direction: Choose the best answer among the 4 choices.
  1. An echo occurs when sound
  A. is transmitted through a surface.
  B. is reflected from a distant surface.
  C. changes speed when it strikes a distant surface.
  D. all of the above
  
  ## 2. The change in direction of a sound wave around corners is
  
  called
  A. diffraction B. interference
  C. refraction D, interference
  
  3. You can hear noises a long distance away over water at night
  because
  A. of lowered temperature.
  B. water conducts sound better at night.
  C. sound is reflected off water more efficiently at night.
  D. of refraction of sound in air.
  
  ## 4. The method of detecting the presence, position and direction of
  
  motion of distant objects by reflecting a beam of sound waves is
  known as _____.
  C. MIR D. CRO
  
  ## 5. The technique used by bats to find their way or to locate
  
  food is _______.
  C. ECHOLOCATION D. FLAPPING
  
  What is light?
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored below
  80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with
  other teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of some properties and
  
  A. Content Standards characteristics of visible light.
  
  ## The learner shall be able to discuss phenomena such as blue
  
  B. Performance Standards sky, rainbow and red sunset using the concept of wavelength
  and frequency of visible light
  C. (S8FE-If-26)
   Demonstrate the existence of the color components of
  visible light using a prism or diffraction grating
  
  ## Learning Competencies / Objectives Objectives:
  
  Write the LC code for each 1. Describe refraction.
  2. Use refraction to explain apparent changes of the positions of
  things we see.
  3. Describe the behavior of light as it travels from one medium to
  another.
  Module IV: LIGHT
  II. CONTENT Lesson 20: REFRACTION OF LIGHT RAYS
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages 55-56
  2. Learner's Materials Pages 94-97
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  How do sound waves reflect and refract?
  new lesson
  Light exhibits the characteristics and properties of a wave. Light
  tends to travel in a straight line, unless it is acted on by
  some external force or condition. "What kinds of forces or
  B. Establishing a purpose for the Lesson conditions can affect light, and how?" To answer this
  from each other.
  
  ## Why do our finger look swollen or big when we dip it into
  
  C. the water? Ask the students if they know the meaning of work.
  Presenting examples / instances of the
  Emphasize to them that the meaning /definition of work and the
  new lesson
  one that we use in Science are quite different.
  
  ## D. Discussing new concepts and practicing Activity-See Lesson Guide pp 77-78
  
  new skills #1
  E. Analysis:
  
  Part A:
  1. List and arrange the observed colors according to how
  Discussing new concepts and practicing
  they appear on the paper.
  new skills #2
  Part B.
  2. Describe the position of the different colors after passing
  through the prism
  3. Explain the dispersion of white light. Why is the prism or
  water able to separate the colors of white light?
  
  ## 4. Compare your results in the first part with your results in
  
  the second part. Are there any differences?
  What might account for the differences?
  
  ## 5. What did you observe with the indices of refraction of the
  
  colors of light in the acrylic prism?
  
  ## 6. How would this indices of refraction account for the
  
  arrangement of colors of light?
  
  F.
  Developing mastery Discuss the answers in the activity given
  G
  
  ## Finding practical applications of concepts
  
  and skills in daily living
  
  ## When driving on a black road on a hot day, you may see
  
  what appear to be a puddle of water up ahead of you. But when
  you get there, it is dry. Why?
  What is this phenomenon called? (a mirage)
  
  ## H. Light travels in a straight line. This is so as long as long as the
  
  medium in which it is traveling is uniform all throughout.
  When light crosses a boundary between two transparent media
  of different optical densities, light bends. The bending of light due
  to change in its speed is called refraction. When light travels from
  air to water, the speed of light decreases because the optical
  density of water is greater than air.
  
  Light travels in
  Making generalizations and abstractions a straight line. This is so as long as long as the medium in which
  about the lesson it is traveling is uniform all throughout. When light crosses a
  boundary between two transparent media of different optical
  densities, light bends. The bending of light due to change in its
  speed is called refraction. When light travels from air to water,
  the speed of light decreases because the optical density of
  water is greater than air.
  
  ## In figure 3, θi is the angle of incidence and θr is the angle of
  
  refraction (the angle between the outgoing ray, in the medium,
  and the normal to the boundary).
  
  ## As light enters an optically more dense material, the angle of
  
  refraction is smaller than the angle of incidence-the light bends
  toward the normal. Likewise, if light passes from an optically
  dense medium to a less dense medium, the light bends away
  from the normal.
  A known indicator of the optical density of a material is
  the index of refraction of the material. Index of refraction
  represented by the symbol n is the ratio of the speed of light in
  vacuum and its speed in another medium. In symbols;
  n= speed of light in a vacuum
  speed of light in material
  
  ## The ratio is always greater than 1. For water, n is
  
  usually equal to 1.360 while air is more or less comparable to
  vacuum so its n is 1.000.
  
  ## In figure 3, θi is the angle of incidence and θr is the able of
  
  refraction (the angle between the outgoing ray, in the
  medium, and the normal to the boundary).
  
  ## As light enters an optically more dense material, the
  
  angle of refraction is smaller than the angle of incidence-the light
  bends toward the normal. Likewise, if light passes from an
  optically dense medium to a less dense medium, the light bends
  away from the normal.
  
  ## A known indicator of the optical density of a material is
  
  the index of refraction of the material. Index of refraction
  represented by the symbol n is the ratio of the speed of light in
  vacuum and its speed in another medium. In symbols;
  n= speed of light in a vacuum
  speed of light in material
  
  ## The ratio is always greater than 1. For water, n is
  
  usually equal to 1.360 while air is more or less comparable to
  vacuum so its n is 1.000.
  
  ## Direction: Complete each statement by supplying the
  
  correct term. You may choose the answer from the box below.
  
  ## 1. The bending of light when it passes obliquely from one
  
  medium to another is known as ________. (refraction)
  I. Evaluating Learning
  2. Refraction is the bending of light from one ________ to
  another. (medium)
  
  ## 3. When light passes from a less dense to a denser medium, it
  
  _____.
  (bends towards the normal)
  
  ## 4. When a light ray passes from water to air (denser to a less
  
  dense medium), its path __________. (bends away from the
  normal)
  
  ## 5. The phenomenon that motorists observe on hot days when the
  
  road seems to be covered with water. (mirage)
  
  J. Additional activities for application or What are the different colors of light?
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## B. No. of learners who require additional activities
  
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of some properties and
  
  A. Content Standards
  characteristics of visible light.
  
  ## The learner shall be able to discuss phenomena such as blue sky,
  
  B. Performance Standards rainbow and red sunset using the concept of wavelength and
  frequency of visible light
  C. (S8FE-If-26)
   Demonstrate the existence of the color components of
  visible light using a prism or diffraction grating.
  
  Objectives:
  Learning Competencies / Objectives
  Infer that:
  Write the LC code for each
  (a) white light is made up of many different colors of light and
  (b) each of these colors of light bends differently when it strikes
  objects like a prism.
  
  ## Module IV: LIGHT
  
  II. CONTENT Lesson 21: DISPERSION
  
  ## III. LEARNING RESOURCES
  
  A. References
  57-60
  1. Teacher's Guide Pages
  
  98-100
  2. Learner's Materials Pages
  
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  A. Reviewing previous lesson or presenting the Describe the behavior of light as it passes from one medium to
  new lesson another
  
  ## What do you see in the picture?
  
  Are you fond of rainbow hunting?
  
  ## Presenting examples / instances of the
  
  C. Have you ever wondered how rainbow appears in a clear sky?
  new lesson
  How rainbow form and what are the colors of the rainbow?
  D. Discussing new concepts and practicing
  Activity-see Lesson Guide pp. 82-83
  new skills #1
  Analysis:
  
  Part A:
  1. List and arrange the observed colors according to how they
  appear on the paper.
  
  Part B.
  2. Describe the position of the different colors after passing
  through the prism.
  
  ## 3. Explain the dispersion of white light. Why is the prism or water
  
  Discussing new concepts and practicing
  E. able to separate the colors of white light?
  new skills #2
  4. Compare your results in the first part with your results in the
  Second part. Are there any differences? What might account
  for the differences?
  
  5. What did you observe with the indices of refraction of the colors
  of light in the acrylic prism?
  
  ## 6. How would this indices of refraction account for the
  
  arrangement of colors of light?
  
  F. Developing mastery
  Discuss the answer in the activity given
  
  Do you agree in the saying that “At the end of a rainbow is a pot
  of gold”. Why or why not.
  
  ## Finding practical applications of concepts
  
  and skills in daily living
  G.
  
  ## Upon passage through the prism, the white light is
  
  separated into its component colors - red, orange, yellow, green,
  blue and violet. The separation of visible light into its different
  colors is known as dispersion. Dispersion is a special kind of
  refraction which provided us colors of light. It occurs whenever
  there is a process that changes the direction of light in a manner
  that depends on wavelength. Dispersion can occur for any type of
  wave and always involves wavelength-dependent processes. For
  a given medium, n increases as wavelength decreases and is
  greatest for violet light. Thus violet light is bent more than red
  H. light, as can be seen with a prism. Refer to the figure below.
  
  ## Figure 1. Dispersion of white light into bands of colors In a
  
  rainbow, light enters a drop of water and is reflected from the back
  of the drop. The light is refracted both as it enters and as it leaves
  the drop.
  
  ## The formation of a rainbow involves a series of physical
  
  phenomena - reflection, refraction, dispersion and total internal
  reflection. The occurrence of each of these is due to the
  interaction of light with air and water and the boundaries
  between them.
  
  ## 1. The splitting of white light into several colors on passing
  
  through a glass prism is due to____.
  2. When does a rainbow occur in nature? _____
  3. Rainbow formation is due to_____.
  4. Which color is bent the most? ____
  5. Which color is bent the least? ___
  I. Evaluating Learning
  
  1. Dispersion
  2. After the rainstorm, when the sun comes out
  3. the properties of light namely reflection, refraction ,total internal
  reflection and dispersion
  4. violet
  5. red
  
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## A. No. of learners who earned 80% in the evaluation
  
  B. No. of learners who require additional activities
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of some properties and
  
  A. Content Standards characteristics of visible light.
  
  ## The learner shall be able to discuss phenomena such as blue sky,
  
  B. Performance Standards rainbow and red sunset using the concept of wavelength and
  frequency of visible light
  C. (S8FE-If-27)
   Demonstrate the existence of the color components of
  visible light using a prism or diffraction grating
  
  ## Learning Competencies / Objectives Objectives:
  
  Write the LC code for each Infer that:
  1. energy of the colors of light increases as one goes towards the
  right side of the color spectrum;
  2. red light has the least energy and violet light has the most
  energy.
  Module IV: LIGHT
  II. CONTENT Lesson 22: COLORS IN RELATION TO ENERGY
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages 61
  2. Learner's Materials Pages 103-105
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  Describe the position of the different colors after passing through
  new lesson
  the prism.
  
  ## Why do you think we tend objects as having fixed colors?
  
  B. Establishing a purpose for the Lesson
  
  ## For example, an apple is red. In reality, an object’s appearance
  
  results from the way it reflects the particular light that is falling on
  C. Presenting examples / instances of the
  it. Under white light, the apple appears red because it tends to
  new lesson
  reflect light in the red portion of the spectrum and absorb light.
  
  D. Discussing new concepts and practicing Activity see Lesson Guide pp. 85-86
  new skills #1
  Analysis:
  
  ## 1. Which thermometer registered the lowest temperature?
  
  2. Which thermometer registered the highest temperature?
  3. Which colored plastic allowed more energy to pass through it?
  Discussing new concepts and practicing
  E. 4. Which colored plastic allowed the least energy to pass through
  new skills #2
  it?
  5. From your answers in 3 and 4, which color of light has the least
  energy? The most energy?
  
  F. Developing mastery
  Discuss the answers in the activity given
  Finding practical applications of concepts Explain the following:
  and skills in daily living
  1. Why the sky is blue?
  The sky appears blue because of the scattering of blue and violet
  light from the sunlight in the atmosphere. Violet light is more
  scattered than blue light; however, our eyes are most sensitive to
  blue, thus we see a blue sky.
  
  ## 2. Why the sunset is red?
  
  During sunset, the path through which the light travels in the
  G atmosphere becomes longer. As a consequence, more blue and
  violet are scattered from sunlight. Thus, less blue light reaches the
  ground and the light that reaches the Earth’s surface is red.
  
  ## 3. Why the clouds are white?
  
  Clouds are made up of cluster of water droplets of different sizes.
  Since the color of scattered light depends on the size of the
  particles, the different-size clusters scatter a variety of colors. The
  smallest clusters scatter blue light resulting in blue clouds; the
  medium-sized cluster make green and the larger ones make red.
  The combination of these result in white cloud
  Energy is directly proportional to the frequency of the light. The
  list of colors goes from low frequency to high frequency. Red
  Orange Yellow Green Blue Indigo Violet. Red has the lowest
  frequency, so red has the lowest energy. Violet has the highest
  frequency, so violet has the highest energy.
  
  ## H. Making generalizations and abstractions
  
  Our eyes are sensitive to light which lies in a very small region of
  the electromagnetic spectrum labeled "visible light". This "visible
  light" corresponds to a wavelength range of 400 - 700 nanometers
  (nm) and a color range of violet through red. The human eye is
  not capable of "seeing" radiation with wavelengths outside the
  visible spectrum. The visible colors from shortest to longest
  wavelength are: violet, blue, green, yellow, orange, and red.
  Ultraviolet radiation has a shorter wavelength than the visible
  violet light. Infrared radiation has a longer wavelength than visible
  red light. The white light is a mixture of the colors of the visible
  spectrum. Black is a total absence of light.
  
  ## Directions: Choose the letter of the correct answer.
  
  1. Which of the following lights has the highest frequency?
  a. red b. blue
  c. green d. violet
  
  ## 2. What do different wavelengths of light represent?
  
  speed b. amplitude
  colors d. frequency
  
  ## 3. A rainbow usually appears in the sky after a rain. Which of the
  
  following statements best explain this observation?
  a. Raindrops acts as prism separating sunlight into colors.
  b. The white clouds actually prism composed of different colors.
  c. The colors of the rainbow comes from the raindrops in the
  I. Evaluating Learning
  atmosphere
  d. When sunlight is reflected by the ground towards the clouds, it
  separate into different colors.
  
  ## 4. Which of the following has the longest wavelength?
  
  a. red b. violet
  c. orange d. green
  
  ## 5. The process of separating white light into bands of colors using
  
  a prism is known as _________.
  a. refraction
  b. dispersion
  c. reflection
  d. diffraction
  
  ## J. Additional activities for application or Prepare a color wheel.
  
  remediation Please refer to LM pp. 103 – 105 for the materials and procedure.
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## B. No. of learners who require additional activities
  
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Science)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of some properties and
  
  A. Content Standards
  characteristics of visible light.
  
  ## The learner shall be able to discuss phenomena such as blue
  
  B. Performance Standards sky, rainbow and red sunset using the concept of wavelength
  and frequency of visible light
  C. S8FE-If-28
   Explain that red is the least bent and violet the most bent
  according to their wavelengths or frequencies.
  
  Objectives:
  Learning Competencies / Objectives
  Infer that:
  Write the LC code for each
  1. light is composed of colors of different frequencies and
  wavelength;
  2. the frequencies of the colors of light are inversely proportional
  to the wavelength;
  3. the arrangement of colors of light shows the hierarchy of the
  color’s corresponding energy.
  Module IV: LIGHT
  II. CONTENT Lesson 23: REFRACTIVE INDEX OF THE COLOR OF LIGHT
  
  ## III. LEARNING RESOURCES
  
  A. References
  61
  1. Teacher's Guide Pages
  105-110
  2. Learner's Materials Pages
  
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  Which colors of light has the least energy? Most energy?
  new lesson
  Study and analyze the pictures of the stars at night.
  
  ## B. Establishing a purpose for the Lesson
  
  C. Presenting examples / instances of the Do you think they have the same energy? Explain your answer.
  new lesson
  D. Discussing new concepts and practicing
  Activity-see Lesson Guide pp. 90-91
  new skills #1
  Analysis:
  
  wavelength?
  
  wavelength?
  
  ## 3. What did you observe about the wavelengths and frequencies
  
  of the different colors of light?
  
  E. Discussing new concepts and practicing 4. What did you observe about the products of frequencies and
  new skills #2 wavelengths?
  
  violet?
  
  red to violet?
  
  ## 7. How is frequency relate to energy of colors of light?
  
  F. Developing mastery
  Discuss the answers in the activity given
  
  ## The effects of colored light on people have been studied by
  
  psychologists. They found out that people do show varied
  responses to different colors. Colors influence a person’s
  emotion and degree of activity.
  
  According to psychologists:
  1. Red light/color may bring about a rise in blood pressure,
  G. respiration rate, and frequency of blinking. It excites people.
  Finding practical applications of concepts 2. Blue light/color produces effects opposite to those red light;
  and skills in daily living hence, it lessens activity.
  3. Purple has a mournful effect.
  4. Yellow is joyful and green has a peaceful effect.
  
  ## a. choose red paint/wall paper for your bedroom?
  
  b. wear black during summer?
  c. wear light colored shirt during cold days
  
  ## What is the relationship between wavelength, frequency and
  
  energy?
  The greater the energy, the larger the frequency and the
  shorter (smaller) the wavelength. Given the relationship between
  wavelength and frequency — the higher the frequency, the
  shorter the wavelength — it follows that short wavelengths are
  more energetic than long wavelengths.
  
  ## How are temperature and color related?
  
  The amount of light produced at each wavelength
  depends on the temperature of the object producing the light.
  H. Stars hotter than the Sun (over 6,000 degrees C) put out most of
  their light in the blue and ultraviolet regions of the spectrum.
  Making generalizations and abstractions
  Stars cooler than the Sun (below 5,000 degrees C) put out most
  of their light in the red and infrared regions of the spectrum. Solid
  objects heated to 1,000 degrees C appear red but are putting out
  far more (invisible) infrared light than red light.
  
  ## How are wavelength and temperature related?
  
  All objects emit electromagnetic radiation, and the
  amount of radiation emitted at each wavelength depends on the
  temperature of the object. Hot objects emit more of their light at
  short wavelengths, and cold objects emit more of their light at
  long wavelengths. The temperature of an object is related to the
  wavelength at which the object gives out the most light.
  The assessment for the day will be based on the outcome/output
  of the activity: the color wheel. It will be graded based of the
  rubric below.
  
  ## Student was mindful of classroom rules/procedure
  
  I. Evaluating Learning Student follows direction
  Student labeled the output correctly(colors and
  fractional parts
  Colors placed in appropriate place on color wheel
  The finish product was neat.
  TOTAL POINTS:
  
  J.
  remediation Give the meaning of heat and temperature
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## B. No. of learners who require additional activities
  
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  
  Daily Lesson Log Teacher Learning Area Physics
  Teaching Date and
  Quarter First
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of heat and
  
  A. Content Standards
  temperature, and the effects of heat on the body.
  B. Performance Standards
  C. (S8FE-Ig--29)
  
  ## Differentiate heat and temperature at the molecular level.
  
  Objectives:
  Learning Competencies / Objectives 1. Distinguish between temperature and heat.
  Write the LC code for each 2. Describe the hotness or coldness of an object in terms of its
  temperature
  3. Compare the changes in the temperature of water to determine
  the relationship between the amount of heat transferred and the
  resulting temperature change.
  
  Module V: HEAT
  II. CONTENT Lesson 24: HEAT TRANSFER
  
  ## III. LEARNING RESOURCES
  
  A. References
  28-29
  1. Teacher's Guide Pages
  38-40
  2. Learner's Materials Pages
  
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  A. Reviewing previous lesson or presenting the What are the three methods of transferring energy?
  new lesson (conduction, convection and radiation)
  
  ## Ask students to jog in place for 15 seconds.
  
  Establishing a purpose for the Lesson
  B.
  C. Presenting examples / instances of the
  What do you feel after performing the jogging activity?
  new lesson
  D. Discussing new concepts and practicing
  Activity- See Leeson Guide pp. 94-95
  new skills #1
  
  1. What actually transferred when you dipped your finger into the
  water? In what direction did it transfer?
  
  ## 3. How close is your estimated value to the measured
  
  temperature of the water?
  E.
  Discussing new concepts and practicing 4. Which container feels ‘hottest’? Which container feels ‘coolest’?
  new skills #2
  5. What do you think causes the difference in the hotness or
  coldness of the water inside the containers?
  
  ## 6. In which container(s) is heat transfer taking place? What
  
  absorbs heat? Which gives off heat?
  
  ## 7.In which container was there the greatest amount of heat
  
  8. How are the amount of heat transferred and the change in
  temperature of water related?
  
  F. Developing mastery
  Discuss the answers in the activity given
  
  G.
  Finding practical applications of concepts
  and skills in daily living
  
  ## Heat is the total energy of molecular motion in a substance while
  
  temperature is a measure of the average energy of molecular
  motion in a substance. If heat is absorbed or given off by an
  object, its temperature changes. If the object absorbs heat its
  temperature rises while if the object gives off heat its temperature
  decreases.
  
  ## Heat is transfer of (thermal) energy between objects or places
  
  due to temperature differences.
  
  ## Heat transfers from an object of higher temperature to an
  
  object of lower temperature.
  Direction: Read each question carefully. Choose the letter of the
  
  ## 1. Which of the following energies is transferred from one thin to
  
  another because of the temperature differences between
  things?
  A. Heat B. temperature
  C. Kinetic energy D. internal energy
  
  ## 2. The natural flow of heat is always from ________.
  
  A. hot to cold C. cold to hot
  B. lower temperature to higher temperature D. both A and
  
  ## 3. What causes an ice to melt?
  
  A. the change in weather
  B. the presence of hot water
  C. the absorption of the heat from its surrounding
  D. the release of heat to the cooler surrounding
  
  4. Which of the following will likely happen when a hot and a cold
  are put in contact with one another?
  A. The hot and the cold object will become colder.
  B. The hot and the cold object will become hotter.
  C. The cold object will become colder while the hot object will
  I. Evaluating Learning become hotter.
  D. The cold object will become warmer while the hot object
  will become colder.
  
  ## 5.How are the amount of heat transferred and the change in
  
  temperature of water related?
  A. The change in temperature is inversely proportional to the
  heat transferred.
  B. The amount of heat transferred is proportional to the
  change in temperature.
  C. The amount of heat transferred is inversely proportional
  to the temperature.
  D. There is no relation between the heat transferred and the
  change in temperature.
  
  Answe
  
  J. Additional activities for application or How is temperature related to the kinetic energy of particles?
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## A. No. of learners who earned 80% in the evaluation
  
  B.
  No. of learners who require additional activities
  for remediation who scored below 80%
  
  ## C. Did the remedial lessons work? No. of learners
  
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of heat and
  
  A. Content Standards
  temperature, and the effects of heat on the body.
  B. Performance Standards
  C. (S8FE-Ig--29)
  
  ##  Differentiate heat and temperature at the molecular
  
  level.
  Learning Competencies / Objectives
  Objectives:
  Write the LC code for each
  1.Explain the scattering of the dye in water at different
  temperature.
  2.Describe the relation of the temperature of the water to the
  rate of scattering of the dye.
  Module V: HEAT
  II. CONTENT Lesson 25: EFFECT OF TEMPERATURE ON PARTICLES OF
  MATTER
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages 29-31
  2. Learner's Materials Pages 41-43
  3. Textbook Pages
  Resource (LR) portal
  
  ## B. Other Learning Resource
  
  IV. PROCEDURES
  
  A. Reviewing previous lesson or presenting the How will you describe the transferring of heat from one body to
  new lesson another?
  Use the following demonstration to begin a discussion on
  the effect of temperature on particle movement. Blow up a
  B. Establishing a purpose for the Lesson balloon, and then aim a hair dryer on low setting at the balloon,
  and watch it rise.
  
  Questions:
  1 .What happens when I blow hot air on the balloon? Why?
  2. What is happening to the air inside the balloon?
  3. What do you think would happen if the balloon was placed in
  Presenting examples / instances of the
  C. a cold car?
  new lesson
  4. What would happen to the balloon as the temperature
  increases in the car? Why?
  5. Ask the students to think about what might happen to a
  balloon in a bottle when it is heated.
  
  ## D. Activity- see Lesson Guide pp 99-101
  
  Discussing new concepts and practicing
  new skills #1
  1. What similarities and differences did you observe when a
  drop of dye was added to each container?
  
  ## E. 2. In which container did the dye scatter the fastest? In which
  
  Discussing new concepts and practicing
  did it scatter the slowest?
  new skills #2
  3. How do you relate the temperature of the water to the rate of
  scattering of the dye?
  4. In which container are the particles of water moving fastest?
  In which container are the particles moving slowest?
  5. How is temperature related to the speed of the particles?
  
  ## F. Discuss the answers in the activity given
  
  Developing mastery
  
  ## Watch the short video clip on Relation Between Temperature
  
  Finding practical applications of concepts and Molecular Movements, you my download the video on
  G. and skills in daily living www.youtube.com/watch?v=ZqVC10Q1jcQ, then
  answer the question that follows? During hot day why do we
  prefer drinking cold water than hot water?
  
  ## If heat is added to an object, the particles of the object
  
  gain kinetic energy and they move faster. Since temperature is
  directly related to kinetic energy, any gain in kinetic energy
  Making generalizations and abstractions
  H. would cause the temperature to increase. Conversely, if heat is
  transferred or removed from an object, it loses kinetic energy,
  its particles move slower and the body’s temperature
  decreases.
  
  ## 1. When the temperature of an object increases, the average
  
  kinetic energy of the molecules ________.
  A. increases
  B. decreases
  C. remains the same
  D. becomes colder
  
  ## 2. In which of the following will the movement of particles be the
  
  fastest?
  A.30 0C of water C. 70 0C of water
  B.50 0C of water D. 90 0C of water
  
  ## 3. The _________ in/the temperature of the water, the greater
  
  the speed of the moving particles.
  A. lower B. higher
  C. decrease D. changes
  
  4.The quantity that tells how hot or cold an object is with respect
  I. Evaluating Learning to some standard
  A. mass B. heat
  C. pressure D. temperature
  
  ## 5.Which of the following should be done when measuring the
  
  temperature of water in a glass container?
  A. Stir the water using the thermometer to get the
  temperature faster.
  B .Avoid letting the thermometer get in contact with any side
  of the container.
  C. Shake the thermometer vigorously before getting the
  temperature of the water.
  D. Let the tip of the thermometer touch the glass container to
  get the temperature faster.
  
  1. A
  2. D
  3. B
  4. D
  5. B
  J.
  Additional activities for application or How do temperature affects thermal expansion of some
  remediation objects?
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## B. No. of learners who require additional activities
  
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of heat and
  
  A. Content Standards temperature and the effects of heat on the body.
  
  B. Performance Standards
  C. (S8FE-Ig-29)
   Differentiate between heat and temperature at the
  molecular level.
  Learning Competencies / Objectives
  Write the LC code for each Objectives:
  1. Define thermal expansion
  2 .Determine experimentally how temperature affects thermal
  expansion of some objects.
  Module V: HEAT
  II. CONTENT Lesson 26: THERMAL EXPANSION
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages 31
  2. Learner's Materials Pages 43-44
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  How is temperature related to the kinetic energy of particles?
  new lesson
  You are very familiar to a device called thermometer. You have
  most probably used this device many times. The one
  B. Establishing a purpose for the Lesson commonly available in our school laboratory is the liquid
  thermometer.
  
  ## Why does the liquid inside the tube of the thermometer go up
  
  C. Presenting examples / instances of the and down? Does the working principle of the mercury/alcohol
  new lesson thermometer also true to most solids?
  
  new skills #1
  E. Analysis:
  
  ## 1. What happens to the height of the weight when the wire is
  
  Discussing new concepts and practicing
  heated?
  new skills #2
  2. What factors affect the expansion of the wire?
  3. Identify the effects of thermal expansion and contraction to
  some materials.
  F. Developing mastery
  Discuss the answers in the activity given
  There are some applications of thermal expansion in day-to-day
  life. Some of them are the following, or you may watch
  G Finding practical applications of concepts this short video www.youtube.com/watch?v=4UE_cxd7TEw for
  and skills in daily living some practical application of thermal expansion used at home.
  
  ## What are the Engineering Applications of Thermal expansions?
  
  1. Railway track:
  Railway tracks are an example where the concept of thermal
  expansion is used. Space is left between railway tracks as an
  allowance for their expansion when temperature increases,
  otherwise the rails may buckle.
  
  2. Steel Bridges:
  Similarly, long steel bridges are designed to include expansion
  joints to allow for their expansion, by fixing one end and resting
  other end on rollers.
  
  3. Mercury Thermometers:
  Thermal expansion is applied in mercury that contains liquid, the
  volume of which changes as the temperature varies. Liquid
  occupy less space when cold, but additional space is needed
  when temperature varies. As the liquid expands, its volume
  changes and it is forced to flow along the tube that is calibrated
  to show the temperature.
  (Note: Mercury thermometer is now being banned to be used in
  science laboratory because of its health hazards.)
  
  ## 4. Bi-metal strip Thermometers:
  
  Bi-metal strips in a mechanical thermometer possess co-efficient
  of thermal expansion, due to which their expansion with a rise in
  temperature is different. The strips sin bend since the expansion
  or contraction of the material used is not similar. This concept is
  used in measurement of temperature.
  
  ## 5. Automobile Engine Coolant:
  
  The concept of thermal expansion is also used in systems of
  engine coolant in automobiles. If coolant is filled in the radiator
  with engine in a cold condition, it will spill over with the heating of
  engine during operation. Thus an overflow tank is fitted that
  accumulates such coolant during thermal expansion, and as
  engine is cooled, it returns to the radiator.
  
  ## Thermal expansion is another effect of heat transfer. It does not
  
  apply only to the liquid inside the thermometer. In fact, it applies
  to almost everything around us, be it a solid, a liquid, or a gas.
  
  ## What is thermal expansion and how does it work?
  
  Thermal expansion is the tendency of matter to change in
  volume in response to a change in temperature, through heat
  transfer. Temperature is a monotonic function of the
  H. average molecular kinetic energy of a substance. When a
  Making generalizations and abstractions
  substance is heated, the kinetic energy of its molecules
  increases.
  
  ## What must happen to the temperature of a material for thermal
  
  expansion to occur?
  Factors affecting thermal expansion. Imagine that a long, thin
  metal wire is heated. The wire expands. The amount by which it
  expands depends on three factors: its original length, the
  temperature change, and the thermal (heat) properties of the
  metal itself.
  Direction: Read each question carefully. Then select the letter of
  
  ## 1. A person cannot unscrew the lid of a pot of jam. He finds
  
  that the lid can be unscrewed after it has been held under hot
  water for a few seconds. Why he has to do this?
  A. The air pressure in the jar falls
  B. The jam melts
  C. The lid expands
  D. The glass expands.
  
  ## 2. The change in length of an object when it undergoes a
  
  temperature change is related to
  A. its mass
  B. its original length.
  C. the magnitude of the temperature change.
  D. both B and C
  
  ## 3. The change in length of an object subjected to a change in
  
  I. Evaluating Learning
  temperature
  directly depends on
  A. its material of which it is made.
  B. the change in temperature.
  C. the original length of the object.
  D. all of these.
  
  ## 4. The working of a simple thermostat depends on
  
  A. thermal expansion.
  B. specific heats.
  C. the second law of thermodynamics.
  D. condensation
  
  5. An axle is too large to fit into the hole in a wheel that is made
  of the same metal. How can the axle be made to fit into the hole.
  A. by heating the wheel alone
  B. by cooling both the axle and the wheel
  C. by cooling the axle alone
  D. by heating both the axle and the wheel
  
  J. Additional activities for application or What is the effect of temperature change on phase changes?
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## B. No. of learners who require additional activities
  
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  Daily Lesson Log Teacher Learning Area SCIENCE
  Teaching Date and
  Quarter First (Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of heat and
  
  A. Content Standards
  temperature and the effects of heat on the body.
  
  B. Performance Standards
  C.
  (S8FE-Ig-29)
   Differentiate between heat and temperature at the
  molecular level
  Learning Competencies / Objectives
  Write the LC code for each
  Objective:
  Explain the effect of temperature change on phase changes.
  
  Module V: HEAT
  II. CONTENT Lesson 27: PHASE CHANGE
  
  ## III. LEARNING RESOURCES
  
  A. References
  31-33
  1. Teacher's Guide Pages
  45-48
  2. Learner's Materials Pages
  
  3. Textbook Pages
  Resource (LR) portal
  Other Learning Resource
  B.
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting the
  
  What is thermal expansion? How does it work?
  new lesson
  The students need to understand the difference
  between particles in a gas, liquid, and a solid. Have students
  look at the Gases, Liquids, and Solids page on the Purdue
  University Chemistry Department website
  B. Establishing a purpose for the Lesson
  (https://www.chem.purdue.edu/gchelp/liquids/character.html)
  Here they will see how the characteristics of solids, liquids, and
  gases can be explained by particle motion.
  
  ## Discuss what happens at both the observable and molecular
  
  level in these scenarios:
  C. Presenting examples / instances of the
  new lesson 1. Water is placed in the freezer.
  2 .Ice melts.
  3. A puddle evaporates.
  D. Discussing new concepts and practicing
  Activity-see Lesson Guide pp. 109
  new skills #1
  E. Station 1 :
  1. Why does the ice inside the container melt after sometime?
  Discussing new concepts and practicing 2. Describe the temperature of the water while the ice melting.
  new skills #2 3 .Describe the temperature of the water after the ice has melted.
  variable? (Note that the independent quantity is plotted along the
  X axis while the dependent quantity is plotted along the Y-axis.
  6 .What can you say about the one variable as the other variable
  changes? What relationship can be infer from the graph?
  
  Station 2:
  
  ## 1. Describe and interpret your graph.
  
  2. What similarities and differences have you noticed between
  your graphs obtained from Station 1 and Station 2?
  F. Developing mastery
  Discuss the answer in the activity given
  What is the importance of phase change in the preparation of
  
  ## Ice is in solid form. Therefore, its particles are actually
  
  moving more slowly (still locked in lattice position) than those in
  the liquid brine (sliding past). Any thermal energy absorbed from
  the cream will first be used to raise the temperature of the brine
  G. Finding practical applications of concepts (which requires more energy to accomplish because of the
  and skills in daily living solute). Once the average kinetic energy of the molecules (aka:
  temperature) in the brine has increased enough, then they will
  begin to transfer energy to the ice, and it will again begin to melt.
  The temperature of the brine will not increase above the melting
  point until all of the ice has melted (all energy is used to
  accomplish phase change before increasing temperature.
  Changing the amount of heat energy usually causes a
  temperature change. However, DURING the phase change, the
  temperature stays the same even though the heat energy
  changes. This energy is going into changing the phase
  and not into raising the temperature. That's why water doesn't
  get hotter while it boils. The temperature remains constant until
  the phase change is complete.
  When a substance changes from one state, or phase, of
  H. Making generalizations and abstractions matter to another we say that it has undergone a change of
  about the lesson state, or we say that it has undergone a change of phase. For
  example, ice melts and water; water evaporates and becomes
  water vapor.
  These changes of phase always occur with a change of
  heat. Heat, which is energy, either comes into the material
  during a change of phase or heat comes out of the
  material during this change. However, although the heat
  content of the material changes, the temperature does not.
  
  Assessment:
  
  ## Direction: Read each statement carefully and write the letter of
  
  1.When a solid, liquid or a gas changes from one physical state
  to another, the change is called
  A. Melting B. Phase change
  C. Solidification D. Freezing
  2.A solid undergoes a phase change to liquid state it
  A. releases heat while remaining at constant temperature
  B. absorbs heat while remaining at a constant temperature
  C. releases heat as the temperature decreases
  D. absorbs heat as the temperature increases
  I. Evaluating Learning 3.The condensation of water vapor actually
  A. Warms the surroundings
  B. Cools the surroundings
  C. Sometimes warm sometimes cools
  D. Neither warms nor cools the surroundings
  4.The phase change occurs when a solid changes to a liquid.
  A. Freezing B. Sublimation
  C. Melting D .Evaporation
  
  ## 5.The phase change occurs when a liquid becomes a solid.
  
  A .Freezing B. Sublimation
  C. Melting D. Evaporation
  
  ## What is heat capacity?
  
  J. Additional activities for application or
  Remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## B. No. of learners who require additional activities
  
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  
  Daily Lesson Log Teacher Learning Area SCIENCE
  Teaching Date and
  Quarter First (Physics)
  Time
  
  DAY:
  
  I. OBJECTIVES
  
  ## The learner demonstrates understanding of heat and
  
  A. Content Standards
  temperature and the effects of heat on the body.
  
  B. Performance Standards
  C. (S8FE-Ig-29)
   Differentiate between heat and temperature at the
  Learning Competencies / Objectives molecular level
  Write the LC code for each
  Objective:
  Compare the heat capacities of the given liquid samples.
  
  ## II. CONTENT Module V: HEAT
  
  Lesson 28: HEAT CAPACITY
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages 34
  2. Learner's Materials Pages 49-51
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource
  
  IV. PROCEDURES
  
  ## Explain the effect of temperature change on phase changes.
  
  Reviewing previous lesson or presenting the
  A. new lesson
  
  Even if the objects are at the same location they have different
  B. Establishing a purpose for the Lesson temperatures.
  
  Have you ever been outside in the playground during one sunny
  day and suddenly touch the metal of a swing set? How does it
  feel? Is it hot? Yes!
  How about walking barefoot on a sunny day? Have you ever
  Presenting examples / instances of the
  the pavement was too hot for your feet? Do you think the grass
  new lesson
  and the pavement are actually different temperatures?
  
  D. Discussing new concepts and practicing Activity see Lesson Guide pp. 112-113
  new skills #1
  
  ## 1. Which liquid requires more time to increase in temperature by
  
  5 degrees? Explain.
  
  ## 2. Which liquid requires more heat to increase in temperature by
  
  5 degrees? Explain.
  E. Discussing new concepts and practicing
  new skills #2 3. Which liquid has a greater heat capacity? Why?
  
  ## F. Discuss the answers in the activity given
  
  Developing mastery
  
  ## Substances that have a high specific heat capacity are suitable
  
  Finding practical applications of concepts as a material for constructing kettle handlers, insulators
  and skills in daily living and oven covers, because, a high amount of heat will cause only
  G a small change in temperature and the material won't get hot too
  fast!
  
  ## The amount of heat needed by a material to increase its
  
  temperature by a degree is called heat capacity (C). To be more
  specific, the term specific heat capacity (c) is used, and this
  refers to the amount of heat required to increase the
  temperature of one unit mass of a given material by one Celsius
  degree. For example, water has a specific heat capacity of 1
  cal/g°C. So it takes 1 calorie of heat to raise the temperature of 1
  gram of water by 1°C. It is expressed in the equation:
  
  H = mc ∆T
  Where: H is the amount of heat,
  H. Making generalizations and abstractions C is the specific heat, and
  about the lesson ∆T is the change in temperature
  
  ## Different materials have different specific heat capacities. Many
  
  metals have low specific heat capacities. This makes them easy
  to heat up and cool down. Water, on the other hand, has a high
  specific heat capacity and so it takes a long time to heat and a
  long time to cool. This makes the water a good coolant for car
  radiators. Because of its high specific heat capacity, it can
  absorb a large amount of heat without causing its temperature to
  rise too high.
  
  ## 1. The amount of heat required to raise the temperature of a
  
  body by 10C is called ______?
  
  ## A. Specific heat B .Heat
  
  C. Temperature D. Heat capacity
  
  ## 2. The amount of heat required to raise the temperature of a unit
  
  __________of a material by 10C is called its heat capacity.
  A. Volume B. Mass
  C. Weight D .Density
  
  ## 3.The specific heat capacity of water is
  
  A.1 cal/g°C B.1.5 cal/g°C
  C.1 cal/g°C D.1.1 cal/g°C
  
  ## 4. Which of the following statements about heat capacity is
  
  correct?
  A. The energy that is transferred from one object to another
  B. The difference between internal and external energy
  C. The amount of energy needed to raise the temperature of a
  substance by 1 degree Celsius
  D. The amount of energy that is naturally within an object
  I. Evaluating Learning
  5. Why does the temperature of the ocean not fluctuating as
  much as the temperature of sand?
  A. Water has higher heat capacity.
  B. Neither of these answers are correct.
  C. Both of these answers are correct.
  D. The mass of the ocean is greater
  
  ## 6 .A substance with higher specific heat will ________.
  
  A. warm faster than other substances
  B. warm slower than other substances
  C. cool faster than other substances
  D. warm at the same rate as other substances
  
  ## 7. Why does the temperature of the ocean not fluctuating as
  
  much as the temperature of sand?
  A. Water has higher heat capacity.
  B. It takes a short time to heat.
  
  ## C. Water has low specific heat capacity.
  
  D. The mass of the ocean is greater.
  8. The quantity of heat required to increase the temperature of a
  unit mass of the substance by 1oC is called ________.
  A. heat B. internal energy C. temperature D. heat capacity
  
  ## 9. Metals are both good heat conductors and electrical
  
  conductors because of the
  A. similarity between thermal and electrical properties.
  B. looseness of outer electrons in metal atoms.
  C. relatively high density of metals.
  D. high elasticity of metals.
  
  ## 10. Which of the following statements about heat capacity is
  
  correct?
  A. The energy that is transferred from one object to another
  B. The difference between internal and external energy
  C. The amount of energy needed to raise the temperature of a
  substance by 1 degree Celsius
  D. The amount of energy that is naturally within an object
  
  ## Define the following terms:
  
  1. electricity
  2. electric current
  J. 3. voltage
  remediation
  4. ammeter
  5. voltmeter
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## B. No. of learners who require additional activities
  
  for remediation who scored below 80%
  C. Did the remedial lessons work? No. of learners
  who have caught up with the lesson
  
  ## D. No. of learners who continue to require
  
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with other
  teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of current-voltage-
  
  A. Content Standards resistance relationship, electric power, electric energy and home
  circuitry.
  The learners shall be able to practice safety in handling electrical
  B. Performance Standards
  devices.
  C.  S8FE – Ih-30
  Infer the relationship between current and charge
  
  Objectives:
  Learning Competencies / Objectives 1. Measure the electric current and voltage in a circuit using an
  Write the LC code for each ammeter and voltmeter respectively; and
  2. Determine the relationship between:
  a. electric current and voltage
  b. electric current and resistance
  3. State Ohm’s Law
  Module VI: ELECTRICITY:
  II. CONTENT Lesson 29: OHM’S LAW: RELATIONSHIP AMONG CURRENT,
  VOLTAGE AND RESISTANCE
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 36 – 38
  2. Learner's Materials Pages pp. 55 - 58
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide in Grade 8 – First Quarter pp. 116 - 120
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting
  
  How do your daily activities being affected by electricity?
  the new lesson
  Show to the students the voltmeter and ammeter and ask them if
  B. Establishing a purpose for the Lesson they are familiar with the materials. Teach them how to use and
  connect properly the ammeter and voltmeter in the circuit.
  C. Presenting examples / instances of the There are three quantities that you should be familiar with the study
  new lesson of electricity. Let us find out in this activity
  D. Discussing new concepts and practicing Do the activity on Measuring Current and Voltage Lesson Guide G-8
  new skills #1 First Quarter pp. 116 -117
  
  ## No. Voltage Current Voltage/Current
  
  of V I V/I
  dry ( volts) ( volt/ampere
  cells ampere)
  1
  2
  E.
  3
  Discussing new concepts and practicing
  new skills #2 1. Compare the brightness of the bulb with one dry cell to its
  brightness when there are two dry cells in the circuit, three dry
  cells in the circuit.
  
  2. What can be inferred about the current passing through the bulb?
  
  ## 3. What can be inferred about the voltage across the bulb?
  
  4. When you graphed the voltage against current, what is the shape
  of the graph line? What does it mean?
  5. Look at column 4. What kind of values did you obtain? What does
  this indicate?
  
  From the activity, notice that the current increases when the voltage
  increases for a common resistance. This only proves that current is
  affected by voltage. Plotting the data of V vs. I gives a straight line
  graph through the origin as shown in the figure below.
  
  Developing mastery
  F.
  Such graph indicates that voltage is directly proportional to the
  current that is
  V α I or
  V=kI
  Where k, the proportionality constant, is the slope of the V
  vs. I graph.
  Note that: k = V/I
  
  ## This constant k is equal to the resistance R, of the circuit, so
  
  R = V/I
  From the equation, the unit of electrical resistance is
  
  defined as
  
  ## In household wiring we use different kind of wires such as aluminum,
  
  nichrome and copper. Why is it that others prepare to use copper for
  Finding practical applications of concepts
  G. household circuits.
  and skills in daily living
  (answer: copper cabling has a lower resistance than aluminum for
  the same length, so copper is safer to use for household circuits)
  
  ## Ohm's law states that the current through a conductor
  
  between two points is directly proportional to the voltage across the
  two points. Introducing the constant of proportionality, the
  resistance, one arrives at the usual mathematical equation that
  describes this relationship:
  
  ## H. Making generalizations and abstractions
  
  where I is the current through the conductor in units of amperes. The
  rate of the flow of electricity is the current. The ammeter is the
  instrument used to measure current. V is the voltage measured
  across the conductor in units of volts. The instrument that directly
  measure this is the voltmeter, and R is the resistance to the flow of
  electrons in the conductor, is expressed in ohms Ω. Using an
  ohmmeter is one way of directly measuring electrical resistance.
  
  ## 1. Which statement regarding Ohm's Law is correct?
  
  A. When resistance increases in a circuit with a specific
  potential difference then current must also increase
  B. Increasing the resistance in a circuit always decreases
  the potential difference across it
  C. If resistance is kept constant, potential difference
  I. Evaluating Learning
  changes directly with changes in current
  D. An electrical conductor's resistance depends on the
  potential difference it experiences
  
  ## 2. Fifty identical Christmas lights are connected in series and
  
  plugged into a 220V line.
  (Neglect wire resistance) Calculate the voltage across each
  light bulb.
  A. 2.2 V B. 4.4 V C. 110V D. 220V
  
  ## 3. A piece of wire connected to a 6V cell has a current of 1.5A
  
  flowing through it. What is the resistance of the wire?
  A. 9 ohms
  B. 6 ohms
  C. 4 ohms
  D. 12 ohms
  
  ## 4. If the voltage in the circuit were doubled, what would happen
  
  to the current in the circuit?
  A. current decreases twice
  B. current also doubled
  C. current decreases 4 times
  D. current is not affected
  
  ## 5. What is the voltage difference across a piece of wire of
  
  resistance 100 Ω with a current of 2A
  A. 5 volts
  B. 200 volts
  C. 2 volts
  D. 500 volts
  
  J. Journal Entry:
  remediation Let the students answer questions on the usage of electricity in the
  following places.
  
  V. REMARKS
  
  VI
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored below
  80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with
  other teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of current-voltage-
  
  A. Content Standards resistance relationship, electric power, electric energy and home
  circuitry.
  The learners shall be able to practice safety in handling electrical
  B. Performance Standards
  devices.
  C. S8FE – Ii-31
  
  parallel connections in homes.
  Learning Competencies / Objectives
  Objectives:
  Write the LC code for each
  1. Construct series circuit and parallel circuit.
  2. Differentiate series circuit from parallel circuit.
  3. Explain why household wiring and appliances usually
  connected in parallel.
  
  ## Module VI: ELECTRICITY:
  
  II. CONTENT Lesson 30: SERIES CIRCUIT AND PARALLEL CIRCUIT
  CONNECTION
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 42 - 44
  2. Learner's Materials Pages pp. 61 - 33
  3. Textbook Pages
  Resource (LR) portal
  B. Other Learning Resource Lesson Guide in Grade 8 – First Quarter pp. 121- 128
  
  IV. PROCEDURES
  
  A. Reviewing previous lesson or presenting Identify the three basic electrical quantities and differentiate one
  the new lesson from the other
  Think-Pair-Share
  Group students into pairs and answer the questions “What is
  B. Establishing a purpose for the Lesson Ohm’s Law and what is it for?” They will be tasked to explain their
  
  When you turn off one of the bulbs in your house the others
  remain lighted. But when you remove one bulb from a string of
  C. Presenting examples / instances of the colored Christmas lights the other bulbs go off. Why?
  new lesson ( Let the teacher do the demonstration of removing the bulb of the
  Christmas light and the student to explain what they observed)
  
  D. Discussing new concepts and practicing Do the activity on Series Circuit And Parallel Circuit Connection
  new skills #1 Lesson Guide G-8 First Quarter pp. 127 - 128
  Circuit I
  
  1. What did you observe to the intensity of light as you turn the
  switch on?
  
  2. After inserting one bulb in the circuit, what do you notice to the
  E. brightness of the bulbs?
  Discussing new concepts and practicing
  new skills #2
  3. While the switch is on, what happens to the remaining bulbs after
  unscrewing one bulb from it?
  
  Circuit II
  
  ## 4. Observe the brightness of the bulb in circuit II. How do you
  
  compare the brightness of circuit I from circuit II?
  5. As you add more bulbs, does the brightness of each bulb
  change? Why?
  6. As you unscrew one bulb from circuit II, were the other bulbs
  affected? How does your observation compare to that in step 3?
  
  ## Discuss the differences between a series circuit and a parallel
  
  circuit. Summarize the lesson using the table below.
  
  ## Series Circuit Parallel Circuit
  
  F. Developing mastery
  
  connection in the following situations:
  G.
  Finding practical applications of concepts
  1. connection for Christmas light
  and skills in daily living
  2. streetlights connection
  
  ## Components of an electrical circuit or electronic circuit can
  
  be connected in many different ways. The two simplest of these are
  called series and parallel and occur frequently. Components
  connected in series are connected along a single path, so the same
  current flows through all of the components. Components connected
  in parallel are connected so the same voltage is applied to each
  component.
  
  ## A series circuit is a circuit in which resistors are arranged in a
  
  H. chain, so the current has only one path to take. The current is the
  Making generalizations and abstractions
  same through each resistor. The total resistance of the circuit is
  found by simply adding up the resistance values of the individual
  resistors
  
  ## A parallel circuit is a circuit in which the resistors are
  
  arranged with their heads connected together, and their tails
  connected together. The current in a parallel circuit breaks up, with
  some flowing along each parallel branch and re-combining when the
  branches meet again. The voltage across each resistor in parallel is
  the same.
  
  ## 1. A circuit that has only one electric flow is _________.
  
  A. parallel circuit B. battery circuit
  C. paper circuit D. series circuit
  
  ## 2. What happens to lights in series if one goes out?
  
  A. they all go out B. Every other one goes out
  C. they stay lit D. they flicker
  
  ## 3. What happens to the intensity or the brightness of the lamps
  
  connected in series as more and more lamps are added?
  A. increases B. decreases
  C. remains the same D. cannot be predicted
  I. Evaluating Learning
  4. Two bulbs are connected and plugged to the outlet as shown in
  the figure. Both bulbs have the same..
  A. current
  B. voltage
  C. resistance
  D. voltage and current
  5. In the circuit below, which two elements are connected parallel to
  each other?
  A. A and B
  B. B and C
  C. C and D
  D. A and D
  
  ## J. Prior to the lesson, give the students a research activity. Make a
  
  Additional activities for application or comparison between George Ohm and G. R. Kirchhoff regarding
  remediation their contribution in science. Find out how they were able to come up
  with their laws.
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored below
  80%
  C. Did the remedial lessons work? No. of
  learners
  who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E. Which of my teaching strategies worked well?
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with
  other teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of current-voltage-
  
  A. Content Standards resistance relationship, electric power, electric energy and home
  circuitry.
  The learners shall be able to practice safety in handling electrical
  B. Performance Standards
  devices.
  C. S8 30FE – Ii – 32
  
  ##  Differentiate electrical power and electrical energy
  
  Learning Competencies / Objectives
  Objectives:
  Write the LC code for each
  1. Define (a) electrical power and (b) electrical energy
  2. Relate electrical power to energy.
  3. Relate power to voltage and current
  Module VI: ELECTRICITY:
  II. CONTENT
  Lesson 31: ELECTRICAL POWER AND ENERGY
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 45
  2. Learner's Materials Pages pp. 54 - 55
  3. Textbook Pages
  EASE Physics. Module 7. Lesson 3 and 4
  Resource (LR) portal
  Science and Technology IV. Aquino, Remedios G.et.al. pp. 194-195
  B. Other Learning Resource Science and Technology IV. IMC. Pp. 205-206
  Lesson Guide in Grade 8 – First Quarter pp. 121- 128
  
  IV. PROCEDURES
  
  ## A. Reviewing previous lesson or presenting
  
  Why parallel connection is prepared over series connection?
  the new lesson
  Let the students recall their monthly electric bill. Ask them what
  B. Establishing a purpose for the Lesson factors mostly affect the high cost of their electric bill.
  
  ## Energy makes an electrical appliance work. The amount of
  
  energy the appliance uses depends on the rate at which it uses
  C. Presenting examples / instances of the energy and the length of time it is used. The rate at which an
  new lesson appliance uses up electrical energy is called power input. Power
  input is measured in watts
  
  ACTIVITY
  
  labels.
  
  D.
  
  new skills #1
  
  ## 2. Brainstorm ideas about the significance of the information printed
  
  on the appliances.
  
  3. In the table given below, write down the names of the appliances
  and their power ratings, uses, and power effects such as light,
  heat, mechanical or sound.
  
  ## Appliances Power Use Effects
  
  Rating (w)
  1
  2
  3
  E. Discussing new concepts and practicing 4
  new skills #2
  5
  6
  7
  8
  9
  10
  
  ## 2. What is the importance of knowing the power rating of
  
  appliances?
  F.
  3. What general statement can you make about power rating and the
  Developing mastery effects produced by electricity?
  4. What is the common feature of those appliances like flat iron,
  toaster, stove (range) and hair dryer?
  
  ## What appliances in your home contribute most to your
  
  Finding practical applications of concepts energy consumption?
  G. and skills in daily living What would you suggest to lessen your electrical energy
  consumption?
  
  ## Electric power is the rate at which electrical energy is
  
  transferred by an electric circuit. The SI unit of power is the watt, one
  joule per second. Electric power is usually produced by electric
  generators, but can also be supplied by sources such as electric
  batteries.
  
  ## Electrical energy is energy that is caused by moving electric
  
  H. charges. Since the electric charges are moving, this is a form of
  kinetic energy. The faster the electric charges are moving the more
  Making generalizations and abstractions
  electrical energy they carry. The electrical energy consumed or
  needed in operating various devices may be related to the power
  rating of the devices.
  
  Recall that power is the rate at which work is done per unit
  time. In equation form,
  
  Power = work/time
  where P = power
  W =work
  T = time
  
  unit charge.
  V = W/q
  
  ## Current is also defined as the amount of charge passing through a
  
  point per unit time.
  I = q/t
  
  Therefore:
  P = VI
  
  ## In a simple electric circuit, electric power is the product of
  
  current and voltage. Hence:
  Power = Voltage x Current
  P = VI
  where: P = power in watts
  V = voltage in volts
  I = current in amperes
  
  ## Voltage and current are positively related to power.
  
  Appliance with high voltage across it, or with high current through it,
  it has high power or rate of converting electrical energy to other
  forms.
  
  ## Write TRUE if the statement is true. If the statement is incorrect,
  
  change the underlined word or words to make the statement correct.
  
  1. When the current in the circuit is doubled, the power also doubles.
  
  ## 2. Electrical appliances at home transfer energy from the mains
  
  supply to heat and light our homes.
  
  energy.
  
  ## 4. High power rating electrical appliances give low electrical energy
  
  consumption.
  
  5. Heating appliances like flat iron, toaster and electric stove draw
  more current so they convert more electrical energy than non-
  heating appliances.
  
  ## Make a list of electrical appliances/machines which used electricity
  
  in the following environment:
  1. at home
  J. Additional activities for application or 2. at the hospital
  remediation 3. at school
  4. in the city
  For each item, try to think of an alternative and a way to conserve or
  save power.
  
  V. REMARKS
  
  VI. REFLECTION
  
  A.
  evaluation
  
  ## B. No. of learners who require additional
  
  activities for remediation who scored below
  80%
  
  ## C. Did the remedial lessons work? No. of
  
  learners who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  E.
  Which of my teaching strategies worked well?
  Why did these worked?
  
  ## F. What difficulties did I encounter which my
  
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with
  other teachers?
  
  Daily Lesson Log Teacher Learning Area Science
  Teaching Date and
  Quarter First (Physics)
  Time
  DAY:
  
  I. OBJECTIVES
  
  ## The learners demonstrate an understanding of current-voltage-
  
  A. Content Standards resistance relationship, electric power, electric energy and home
  circuitry.
  The learners shall be able to practice safety in handling electrical
  B. Performance Standards
  devices.
  C. S8 30FE – Ii - 33
  
  ##  Explain the functions of circuit breakers, fuses, earthing,
  
  double insulation, and other safety devices in the home.
  Learning Competencies / Objectives
  Write the LC code for each Objective:
  
  circuit
  
  ## Module VI: ELECTRICITY:
  
  II. CONTENT
  Lesson 32: Safety in Using Electricity: CIRCUIT PROTECTORS
  
  ## III. LEARNING RESOURCES
  
  A. References
  1. Teacher's Guide Pages pp. 45 - 46
  2. Learner's Materials Pages pp. 64-67
  3. Textbook Pages
  EASE Physics, Module 7. Lessons 3 and 4
  Resource (LR) portal
  Science and Technology IV : Physics Textbook. NISMED.2012 pp.
  B. Other Learning Resource
  174 - 175
  
  IV. PROCEDURES
  
  A. Reviewing previous lesson or presenting Recall from the previous lesson electrical appliances that
  the new lesson contain heating element.
  
  ## Let the students discuss among themselves the answers on
  
  B. Establishing a purpose for the Lesson the question, “What do you think is the effect of electric shock in the
  human body. Why is electrical safety important?
  
  ## How many of you have seen a fuse or a circuit breaker at
  
  home? Did you ever wonder why a fuse is needed in your electrical
  Presenting examples / instances of the
  C. connections? Today we will handle a fuse and determine its
  new lesson
  function.
  
  D. Discussing new concepts and practicing Do the activity on Blowing a Fuse, Lesson Guide Grade 8 First
  new skills #1 Quarter pp. 136 – 137.
  
  Case 1
  1. What two things were observed when the switch was closed?
  
  Case 2
  1. What three things were observed when a short wire was
  connected as shown in the diagram?
  Discussing new concepts and practicing
  E. 2. What could have caused the rising and falling of current in the
  new skills #2
  wire in case 2?
  3. Describe the result when there was reduced resistance in the
  circuit.
  4. Identify the case that occurred
  5. Explain why the bulb went off.
  6. What is the role of the fuse in the circuit?
  
  ## F. Developing mastery Discuss the answers in the activity given.
  
  Why is it dangerous to use copper strip or wire in place of a safety
  fuse that blows out?
  Finding practical applications of concepts
  G.
  and skills in daily living
  Why do we need to be protected from the danger in electricity?
  
  Fuses and circuit breakers are both devices that 'break' if the current
  through them is too large.
  
  A fuse is usually a thin piece of wire that will melt and break the
  circuit if too large a current flows through it. The thicker the wire the
  more current is needed to melt it and the higher the 'rating' of the
  fuse. The purpose of a fuse is to protect the wiring and the
  equipment.
  
  A circuit breaker is an electronic circuit that will switch off the current
  if it is too great. Such a circuit is designed to operate much more
  quickly than a fuse and so the damage is less because the current is
  H. switched off in a much shorter time. Circuit breakers are often used
  Making generalizations and abstractions
  to protect the user if the casing of the equipment becomes live. They
  break the circuit before the person using the equipment gets a near
  fatal shock.
  
  ## Grounding is a method of giving electricity the most effect way to
  
  electrical current to return safely to ground without danger to anyone
  in the event of a short circuit. In that instant, the short would cause
  the current to flow through the ground wire, causing a fuse to blow or
  a circuit breaker to trip.
  
  ## An ungrounded electrical box, appliance, power tool, or extension
  
  cord could become a danger if there is no path to ground, except
  through you.
  
  ## Direction: Write the word SAFE if the statement is true and
  
  DANGER if the statement is wrong.
  
  1. Fuses and circuit breakers are both devices that 'break' if the
  current through them is too large. ( safe )
  
  2. A fuse is usually a thick piece of wire that will melt and break the
  circuit if too little amount of current flows through it. (danger)
  I. Evaluating Learning
  3. Grounding is a method of giving electricity the most effect way to
  
  ## 5. A properly grounded circuit has boxes, devices, and service panel
  
  grounds that give the electrical current the easiest path to ground
  and that reduces the chances of someone getting a shock or
  getting electrocuted. (safe)
  
  ## J. Additional activities for application or
  
  Make a research on Octopus Wiring.
  remediation
  
  V. REMARKS
  
  VI. REFLECTION
  
  ## No. of learners who earned 80% in the
  
  A.
  evaluation
  B. No. of learners who require additional
  activities for remediation who scored below
  80%
  C. Did the remedial lessons work? No. of
  learners who have caught up with the lesson
  D. No. of learners who continue to require
  remediation
  
  ## E. Which of my teaching strategies worked well?
  
  Why did these worked?
  F. What difficulties did I encounter which my
  principal or supervisor can help me solve?
  G. What innovation or localized materials did I
  Use or discover which I wish to share with
  other teachers?
  TOPIC OUTLINE
  
  UNIT I. FORCE MOTION AND ENERGY
  
  ## Module Number Topics Learning Competency Code
  
  I. Forces and A. 1. Balance and Unbalanced Forces S8 FE-Ia-15/16
  Motion
  B. 1. Inertia S8 FE-Ia-17
  2. Acceleration
  3. Interaction
  C. 1. Relationship of Circular Motion and S8 FE-Ia-18-19
  Newton’s 2nd Law of Motion
  II. Work, Power and A. 1. What is work?
  Energy 2. Work : Method of Heat Transfer S8 FE – Ic - 20
  3. Calculating the amount of work done.
  B. 1. Relationship among Work, Power and S8 FE – Ic – 21
  Energy
  C. 1. Kinetic Energy S8 FE – Id – 22 - 23
  2. Potential Energy
  III. Sound A. 1. Propagation of Sound S8 FE – Ie - 24
  2. Characteristics of Sounds
  3. Properties of Sounds S8 FE – Ie - 25
  IV. Colors of Light A. 1. The Visible Spectrum S8 FE – If - 26
  B. 2. Dispersion of colors S8 FE – If - 27
  C. 3. Refractive Index of the Color of Light S8 FE – If - 28
  V. Heat A. 1. Heat and Temperature
  2. Thermal Expansion: The Working S8 FE – Ig - 29
  Principles of the Mercury Thermometer
  3. Phase Change
  4. Heat Capacity
  VI. Electricity A. Ohm’s Law: Relationship among Current, S8 30FE – Ih - 30
  voltage and Resistance
  a. Current and Voltage
  b. Current and Resistance
  B. Electrical Connections in homes S8 30FE – Ii - 31
  a. Series
  b. Parallel
  C. Differences between Electrical Power and S8 30FE – Ii - 32
  Electrical Energy
  S8 30FE – Ii - 33
  D. Safety in Using Electricity
  
  Prepared by:
  
  ## ROMANA GLENDA S. LAGMAY OFELIA A. MENDOZA
  
  Bayorbor National High School Coral na Munti National High School
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