Compare longitudinal and transverse effects of tourist helicopters on waves. elephants and the effects of traffic State the meaning of superposition, noise on songbirds. and give examples. Explain why the intensity of sound Explaining: Slinky demonstration waves decreases with increasing Use a slinky spring to illustrate the distance from a source in terms of the difference between longitudinal waves waves spreading out. and transverse waves. Students can Exceeding draw sketches of both waves, Compare quantitatively how the showing direction of wave, intensity of sound waves and waves on compression due to wave passing water decrease with increasing (not transverse waves), motion of distance from the source. marker etc. Plenary: Thinking skills Consider All Possibilities: some waves on water are bigger than others. (Possible answers: some waves are made by bigger stones/disturbances; some waves are further from their source so they are smaller; some waves are a result of two waves in the same place/superposition.) Lesson 8Ia: The particle model Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Expansion n/a Resources n/a Demonstrate Describe the three states of matter in Demonstrate one or more effects from 8Ia one or more terms of shape, volume and caused by the expansion of materials Exploring effects caused compressibility. on heating. Ask students to predict Science. by the State what is meant by diffusion, what will happen in each case, expansion of contraction and expansion. backing these up with an explanation materials on Use the particle model of matter to based on behaviour of the particles. heating. explain the properties of solids, liquids After each demonstration, ask them and gases, and how their movement to review their predictions and Demonstrate changes with temperature. explanations. heating and
Compare longitudinal and transverse waves. State the meaning of superposition, and give examples. Explain why the intensity of sound waves decreases with increasing distance from a source in terms of the waves spreading out. Exceeding Compare quantitatively how the intensity of sound waves and waves on water decrease with increasing distance from the source. effects of tourist helicopters on elephants and the effects of traffic noise on songbirds. Explaining: Slinky demonstration Use a slinky spring to illustrate the difference between longitudinal waves and transverse waves. Students can draw sketches of both waves, showing direction of wave, compression due to wave passing (not transverse waves), motion of marker etc. Plenary: Thinking skills Consider All Possibilities: some waves on water are bigger than others. (Possible answers: some waves are made by bigger stones/disturbances; some waves are further from their source so they are smaller; some waves are a result of two waves in the same place/superposition.) Lesson 8Ia: The particle model Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Describe the three states of matter in terms of shape, volume and compressibility. State what is meant by diffusion, contraction and expansion. Use the particle model of matter to explain the properties of solids, liquids and gases, and how their movement changes with temperature. Starter: Expansion Demonstrate one or more effects caused by the expansion of materials on heating. Ask students to predict what will happen in each case, backing these up with an explanation based on behaviour of the particles. After each demonstration, ask them to review their predictions and explanations. n/a Resources from 8Ia Exploring Science. n/a Demonstrate one or more effects caused by the expansion of materials on heating. Demonstrate heating and
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