1. HEAT

2. Science at ks3 Unit 8l Heating and Cooling(yr8) Recognise the need for a temperature scale Learn to distinguish between heat (as energy) and temperature Learn about the mechanisms for heat transfer: conduction, convection and radiation and apply this to familiar contexts Use the particle model to explain conduction, convection and change of state In scientific enquiry pupils: Draw and interpret graphs from data collected Investigate the effectiveness of different forms of insulation

3. HEAT AND TEMPERATURE A bath of water A lighted match Which has the highest temperature? Energy? Temperature is The Average Kinetic Energy of molecules within the substance Energy is The Total amount of energy contained within the substance

4. HEAT TRANSFER Conduction Convection Radiation Heat Energy transfer through solids by increased electron vibration Heat Energy transfer in liquids and gases Through increased Kinetic Energy of molecules resulting in expansion and therefore reduction in density Heat Energy transfer behaving like light. Not depending on molecules.

5. Heat Transfer Starter activity

6. Animation Heinemann 2 Heinemann 2 Heating and Coling 8I Conduction experiment animation

7. MY GRANNY SAYS Heat rises Shut the door you’ll let the cold in Paint the radiators to match the walls-it looks much better than painting them white.

8. CONDUCTORS AND INSULATORS Practical examples Once upon a time there was an engineer called Mr Dewar………….

9. WATER GOOD OR BAD CONDUCTOR OF HEAT? Classic demonstration

10. CONVECTION Heating causes increased Kinetic Energy of molecules Molecules move further in the same time- causing expansion Similar volume now contains less molecules-is less dense and floats upwards Demos-water, spiral snakes-chimneys

11. RADIATION Heat radiation-radiant heat-infra red radiation An electro-magnetic wave just outside the visible spectrum of light Behaves like light-reflected, refracted, focussed Needs no medium for transfer

12. ABSORPTION OF HEAT Black car-white car Leslie Cube Cans/foil/dishes Matt Black surfaces absorb and radiate heat best

13. THERMOMETERS How to make your own thermometer Use freezing point of water as lower mark Use steam from boiling water as higher mark divide into 100 equal intervals Depends on the fact that liquids expand when heated due to increased Kinetic Energy of molecules

14. HEAT TRANSFERS IN ACTION On shore breezes Boiling a kettle Electric Ovens Heating water to boil an egg

15. HEAT ENERGY Conduction Convection Radiation Radiant Heat Insulators Insulation Temperature Heat Kinetic theory Gases Solids Liquids Vacuum Space Matt Black Shiny Thermometers On shore breezes Kettles Pans Plastic Infra Red Reflection Expansion Less dense Hot air balloons My granny says-heat rises, shut the door you’ll let the cold in, paint the radiators to match the walls