BODY OF KNOWLEDGE: P: Physical Science N: Nature of Science – TOPIC IV: Changes in Matter ESSENTIAL CONTENT Questions you can ask your child: Physical Changes in Matter How can you tell when a physical change has taken place? 1. Appearance may change Sample answer: Its appearance may change in shape, size, phase or state but it is a. shape made of does not change. b. size c. phase/state Describe physical changes that water undergoes as it is heated or cooled 2. Affected by temperature Sample Answer: Phase changes, for example 3. Retains its own properties When heat is added: melting, boiling, evaporating B. Phase Changes of Water as When it is cooled (absence of heat): condensation, freezing it is heated and/or cooled Melting How can you tell when a chemical change has taken place? Boiling Sample Answer: One or more new substances have been formed and their properties Condensation are different from the original substance. Freezing Evaporation What are some types of evidence that a chemical change has taken place? C. Chemical Changes color change Chemical reactions between formation of a gas (bubbling) materials form a new material formation of a solid (precipitate) with different characteristics. temperature change burning odor change rusting decaying animal/plants Temperature may speed up or slow down the reaction. D. Evidence of Chemical Change color change formation of a gas (bubbling) formation of a solid (precipitate) temperature change odor change
BODY OF KNOWLEDGE: P: Physical Science – N: Nature of Science TOPIC IV: Changes in Matter ESSENTIAL CONTENT Questions you can ask your child: Physical Changes in Matter 1. Appearance may change a. shape b. size c. phase/state 2. Affected by temperature 3. Retains its own properties B. Phase Changes of Water as it is heated and/or cooled Melting Boiling Condensation Freezing Evaporation C. Chemical Changes Chemical reactions between materials form a new material with different characteristics. burning rusting decaying animal/plants Temperature may speed up or slow down the reaction. D. Evidence of Chemical Change color change formation of a gas (bubbling) formation of a solid (precipitate) temperature change odor change How can you tell when a physical change has taken place? Sample answer: Its appearance may change in shape, size, phase or state but it is made of does not change. Describe physical changes that water undergoes as it is heated or cooled Sample Answer: Phase changes, for example When heat is added: melting, boiling, evaporating When it is cooled (absence of heat): condensation, freezing How can you tell when a chemical change has taken place? Sample Answer: One or more new substances have been formed and their properties are different from the original substance. What are some types of evidence that a chemical change has taken place? color change formation of a gas (bubbling) formation of a solid (precipitate) temperature change odor change