absorbers. Demonstrate the practical and ask water with an Explain why particular materials are students to explain why the ice does ice cube held at used for given purposes. not melt. its base with a Securing piece of gauze. Evaluate ways of increasing or Exploring: Investigating insulation decreasing energy transfer by Students plan and carry out an Students plan conduction, convection, radiation and investigation of the factors that affect and carry out evaporation. insulation, such as thickness of an investigation Compare the effects of different rates material, type of material, shiny/dull of the factors of conduction in different materials. material, no air, etc. that affect Exceeding insulation, such Apply the idea of thermal mass to Explaining: Air as an insulator as thickness of homes. Demonstrate that most effective material, type Working Scientifically insulators consist mainly of air, by of material, State the meaning of: accuracy. asking students to examine a piece of shiny/dull State the meaning of: precision. foam rubber or expanded polystyrene material, etc. Use information about resolution to using a hand lens, or use a vacuum choose measuring instruments. pump to evacuate the air from a Demonstrate Explain how to avoid systematic and piece of duvet filling. that most random errors. effective Plenary: Thinking about controlling insulators energy transfer consist mainly Odd One Out: glass, feathers, bubble of air. wrap. (Possible answers: glass does not contain pockets of air; feathers come from living things.) Lesson 8Kd: Power and efficiency Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Starter: Appliances brainstorm Exploring: Power Resources n/a Students Match Sankey diagrams to simple Ask students to work in groups to list ratings from 8Kd examine situations. all the devices they can that use Use a joule meter Exploring various items of State the meaning of efficiency and electricity (either from cells or from to demonstrate Science. domestic recall some advantages of efficient the mains). Ask them to agree the amount of equipment appliances. categories for the main way in which energy used in a to find their Identify useful and wasted energies. each device transfers energy, then to fixed time by power ratings.
absorbers. Explain why particular materials are used for given purposes. Securing Evaluate ways of increasing or decreasing energy transfer by conduction, convection, radiation and evaporation. Compare the effects of different rates of conduction in different materials. Exceeding Apply the idea of thermal mass to homes. Working Scientifically State the meaning of: accuracy. State the meaning of: precision. Use information about resolution to choose measuring instruments. Explain how to avoid systematic and random errors. Demonstrate the practical and ask students to explain why the ice does not melt. Exploring: Investigating insulation Students plan and carry out an investigation of the factors that affect insulation, such as thickness of material, type of material, shiny/dull material, no air, etc. Explaining: Air as an insulator Demonstrate that most effective insulators consist mainly of air, by asking students to examine a piece of foam rubber or expanded polystyrene using a hand lens, or use a vacuum pump to evacuate the air from a piece of duvet filling. Plenary: Thinking about controlling energy transfer Odd One Out: glass, feathers, bubble wrap. (Possible answers: glass does not contain pockets of air; feathers come from living things.) water with an ice cube held at its base with a piece of gauze. Students plan and carry out an investigation of the factors that affect insulation, such as thickness of material, type of material, shiny/dull material, etc. Demonstrate that most effective insulators consist mainly of air. Lesson 8Kd: Power and efficiency Learning objectives Exemplar teaching activities Differentiation Resources Maths skills Practical skills Developing Match Sankey diagrams to simple situations. State the meaning of efficiency and recall some advantages of efficient appliances. Identify useful and wasted energies. Starter: Appliances brainstorm Ask students to work in groups to list all the devices they can that use electricity (either from cells or from the mains). Ask them to agree categories for the main way in which each device transfers energy, then to Exploring: Power ratings Use a joule meter to demonstrate the amount of energy used in a fixed time by Resources from 8Kd Exploring Science. n/a Students examine various items of domestic equipment to find their power ratings.
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