Across
- 3. The term used for fuels such as oil, gas and coal
- 6. Solar energy uses these to collect sunlight
- 7. Wind and hydropower energy use these to produce energy
- 8. Energy that can be used up
- 9. This kind of energy collects heat from deep in the earth
Down
- 1. Energy that can be replaced
- 2. This kind of energy is created using waste from animals and plants
- 4. This item is needed to store energy
- 5. A machine that converts (turns) one form of energy into another