Across
- 2. Oil, coal, and natural gas
- 5. Burning fossil fuels causes _________.
- 8. Energy from burning wood
- 9. Heat from deep in the Earth
- 11. Energy from moving water
- 12. Energy from the Sun
- 14. Energy from moving air
Down
- 1. Energy from splitting atoms
- 3. Converts kinetic energy to electricity.
- 4. Hydroelectric dams can harm __________.
- 6. Wind or water spins this to produce electricity.
- 7. It takes ____________ of years for fossil fuels to form
- 10. This fossil fuel is formed on land by the decay of plants.
- 13. Any energy source other than fossil fuels