Across
- 5. energy source formed deep under the Earth's surface.
- 6. movement of electrons in a current.
- 7. rock.
- 8. flow of air.
- 9. water to generate electricity.
- 11. from decayed plants and animals.
- 13. ability to do work.
- 14. atoms that form energy.
- 15. within the Earth.
Down
- 1. chemical energy from the Sun found in and animals.
- 2. from the Sun.
- 3. due to motion.
- 4. energy.
- 10. and Solar energy.
- 12. energy from chemicals.