Term 4 Revision Crossword

3. An angle that is greater or less than 90 degrees.
5. This is measured in degrees Celsius.
8. A food chain is an example of this type of energy system.
10. A type of energy system that involves a flow of charged particles.
11. What light or shiny surfaces do when they receive radiation.
12. A type of heat transfer that does not require physical contact or the movement of particles.
14. A place that experiences 24 hours of daylight in June.
15. Energy that is stored.
18. A type of energy system that involves forces and movement.
19. A kind of current formed by the transfer of heat in a gas or a liquid.
21. The type of potential energy found in a stretched material.
22. The source of energy in an energy flow diagram.
26. The movement of Earth around the Sun.
27. The type of potential energy stored in food and fuels.
28. The seasons experienced when one of Earth's hemispheres is tilted towards the Sun.
29. The type of energy radiated by the Sun.

1. Something that can be done instead of bathing in order to save electricity.
2. Something that can be placed in ceilings to improve energy efficiency.
4. Something that works well with little waste.
6. The type of output energy that is not useful to us.
7. What dark surfaces do when they receive radiation.
8. Something that can be used instead of a heater to keep warm.
9. The direction of Earth's rotation.
13. The way heat energy is transferred in or between solids.
14. The imaginary line that runs through the centre of the Earth.
16. The type of potential energy stored in an object held above Earth's surface.
17. The standard unit of measurement for energy.
20. The changes we observe at the end of an energy flow diagram.
23. A type of energy system that involves the transfer of heat energy.
24. Energy resulting from a change of position or a change of state.
25. Something humans use to prevent a heat loss problem.