Across
- 2. can replace slowly
- 7. can cause pollution and produce energy
- 10. a renewable liquid
- 11. energy by the sun
- 12. a type of rock that can be lit
- 13. can come back fast
- 14. energy from the earth's core
- 15. something that helps us live
Down
- 1. energy that is made from water
- 3. a type of liquid that is fossil fuel
- 4. resources from the earth
- 5. a resource from trees
- 6. mass from living things
- 8. a type of fossil fuel
- 9. fast moving air that provides energy