Securing observe and describe what is asking students glass of a Work out if something will float. happening and then to suggest and to investigate colourless Use ideas about density changes to discuss reasons for these materials that fizzy drink such explain how a hot air balloon flies/how observations. float, to find out as lemonade. the depth of a submarine is controlled. how the volume Exceeding Exploring: Factors affecting upthrust of each sample Students carry Explain that the upthrust depends on Students carry out an investigation to submerged varies out an the weight of fluid displaced. find out if the volume or the density with the volume, investigation to Use ideas about displacement to of an object affects the amount of density or weight find out if the explain phenomena connected with upthrust, using a force meter and of the object. volume or the floating and sinking. balance. density of an object affects Explaining: Cartesian diver the amount of Combine ideas about pressure in upthrust, using fluids and the relationship between a force meter density and floating by demonstrating and balance. a Cartesian diver to students and asking them to suggest how it works. Plenary: Thinking about floating Consider All Possibilities: An object floats. (Possible answers: the object is less dense than water; the object is denser than water but is floating in a liquid with an even greater density; the object is shaped so that it has air spaces so its overall density is less than water.) Lesson 8Ie: Drag Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Speed brainstorm Exploring: Resources Apply Students Recall the different types of resistive Ask students to list the differences Streamlined from 8Ie investigate the forces and describe how they affect between slow and fast vehicles of the shapes Exploring concepts effect of shape movement. same type (e.g., Boeing 747 and the Ask students how Science. and calculate on drag, using a Describe how drag changes with supersonic Concorde, light aircraft the model helps results. dilute mixture
Securing Work out if something will float. Use ideas about density changes to explain how a hot air balloon flies/how the depth of a submarine is controlled. Exceeding Explain that the upthrust depends on the weight of fluid displaced. Use ideas about displacement to explain phenomena connected with floating and sinking. observe and describe what is happening and then to suggest and discuss reasons for these observations. Exploring: Factors affecting upthrust Students carry out an investigation to find out if the volume or the density of an object affects the amount of upthrust, using a force meter and balance. Explaining: Cartesian diver Combine ideas about pressure in fluids and the relationship between density and floating by demonstrating a Cartesian diver to students and asking them to suggest how it works. Plenary: Thinking about floating Consider All Possibilities: An object floats. (Possible answers: the object is less dense than water; the object is denser than water but is floating in a liquid with an even greater density; the object is shaped so that it has air spaces so its overall density is less than water.) asking students to investigate materials that float, to find out how the volume of each sample submerged varies with the volume, density or weight of the object. glass of a colourless fizzy drink such as lemonade. Students carry out an investigation to find out if the volume or the density of an object affects the amount of upthrust, using a force meter and balance. Lesson 8Ie: Drag Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Recall the different types of resistive forces and describe how they affect movement. Describe how drag changes with Starter: Speed brainstorm Ask students to list the differences between slow and fast vehicles of the same type (e.g., Boeing 747 and the supersonic Concorde, light aircraft Exploring: Streamlined shapes Ask students how the model helps Resources from 8Ie Exploring Science. Apply concepts and calculate results. Students investigate the effect of shape on drag, using a dilute mixture