Heating and Cooling

Heating and Cooling

1. Another name for heat energy is: • kinetic energy. • spring energy. • thermal energy. • mechanical energy. Response Grid

2. What are the units for measuring heat energy? • newtons • degrees Celsius • Joules • degrees Fahrenheit Response Grid

3. If you leave a cup of hot tea standing in the kitchen for a whole day, what will happen to its temperature? • It will stay the same. • It will get only a little bit cooler. • It will end up the same temperature as the air in the kitchen. • It will be colder than the air in the kitchen. Response Grid

4. The amount of heat energy in an object depends on three things. Which of these things does it not depend on? • its mass • its colour • its temperature • the material it is made from Response Grid

5. Which of these materials is a goodconductor of heat? • copper • air • water • glass Response Grid

6. When one end of a piece of metal isheated: • the particles get closer together. • the particles vibrate more and the vibrations are passed from particle to particle. • the heat does not move through the metal. • the particles get bigger. Response Grid

7. Solids are better conductors than liquids or gases because: • the particles are closer together in gases. • the particles are closer together in liquids. • the particles are closer together in solids. • the particles in a solid cannot move. Response Grid

8. Feathers are good insulators because: • they are solid. • birds have them. • they trap pockets of air. • they are waterproof. Response Grid

9. Why do materials expand when they are heated? • The particles get bigger. • The particles move around more and take up more space. • The particles get closer together. • The particles stick together. Response Grid

10. Which substances can heat travel through by convection? • solids and liquids • solids and gases • only liquids • liquids and gases Response Grid

Participant Scores

11. Why does the cold air near the ice lolly move downwards? • It is colder and denser than the air near it. • It is warmer and denser than the air near it. • It is colder and less dense than the air near it. • It is warmer and less dense than the air near it. Response Grid

12. Infrared radiation can travel through: • transparent objects only. • opaque objects only. • empty space only. • empty space and transparent objects. Response Grid

13. Why do we need to save energy? • Fossil fuels are running out. • Renewable energy resources are running out. • To pay for insulation. • Renewable energy is cheap. Response Grid

14. Loft insulation is used: • to keep the loft warm. • to keep heat energy in the house. • to stop the roof from being covered with snow. • to protect the rafters. Response Grid

15. Houses can lose heat energy through: • the walls. • the floors. • the windows. • all of the above. Response Grid

16. Duvets and loft insulation are goodinsulators because: • they are soft. • they do not cost very much. • they last a long time. • they contain trapped air. Response Grid

17. When liquid water changes into steam it is: • condensing. • evaporating. • melting. • dissolving. Response Grid

18. Candle wax melts at 57 ºC. At whattemperature does candle wax freeze? • 0 ºC • 7 ºC • 57 ºC • 100 ºC Response Grid

19. What happens to the temperature of the water in a beaker when it is boiling? • It goes up. • It stays the same. • It goes down. • It all depends on how hot the water was to start with. Response Grid

20. When molten wax is freezing and turning back into a solid, what happens to the temperature of the wax? • It goes up. • It stays the same. • It goes down. • It all depends on how hot the wax was to start with. Response Grid

Participant Scores

Heating and Cooling