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