Energy Topic Revision

2. = force x distance
4. This diagram shows energy transfer using arrows.
7. In a solid the particles _____ to pass energy to neighbours.
11. Dark surfaces do this to heat.
12. Is a wave of heat energy.
14. Warm particles spread out and become less ______.
16. The transfer of heat through a solid.
20. How hot or cold something is.
21. Heat transfer through a liquid or gas.
24. Coal and oil are this type of fuel.
25. The idea that tells us energy cannot be created or destroyed, it is _________.
27. Fossil fuels are sometimes called non-______.
28. The unit for energy.

1. These surfaces reflect heat energy.
3. The type of energy moving objects have.
5. Work done is the same as this quantity.
6. Stored energy, e.g in food.
8. When heated a solid will also ______ as the particles take up more space.
9. = (useful energy / total input energy)x100%
10. This renewable energy is reliable, twice a day.
13. The amount of energy inside an object.
15. When an object is the same temperarature as another, we call this thermal ______.
17. Moments have a size and also a ______, such as clockwise.
18. This renewable energy uses hot rocks under the earth to heat water.
19. The amount of energy needed to raise the temperature of 1g of water by 1 degree celsius.
22. This arrow points downwards on a Sankey diagram.
23. A turning force.
26. The middle part of a see-saw that doesn't move.