Across
- 3. when we use heat from the earth to generate heat
- 7. energy created through the splitting of atoms
- 9. those that can be replaced and never run out
- 10. solid fossil fuel that is burned for energy
- 12. the materials we use from nature
- 13. any material made by plants and animals that we can convert into energy
- 14. liquid fossil fuel which is mostly underground
Down
- 1. unlimited heat and light energy
- 2. the best singer alive
- 4. gas of fossil fuels
- 5. those that can't be replaced at the same route it is being used
- 6. flowing water that creates energy that can be captured and turned into electricity
- 8. happens because the sun heats the earth's surface
- 11. releases heat and energy when they are burned and can be bad for the environment