Across
- 4. People use heat to make this.
- 6. Whenever there is light and heat there is this.
- 8. When objects vibrate they produce this.
- 9. These fuels come from ancient organisms.
- 11. These carry sound through the air.
- 13. Energy comes from here.
- 14. The energy of food comes from here.
Down
- 1. These send messages throughout your brain and nerves.
- 2. There is energy when an object is in this.
- 3. Every one of these requires energy.
- 5. This is a fossil fuel.
- 7. Burning gasoline does this to energy.
- 9. A material that has stored energy.
- 10. Plants make this.
- 12. This is the fuel that makes life happen.