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