Across
- 2. energy Using the sun's energy to power or heat
- 5. water Rainwater stored beneath the earth
- 9. energy Uses heat to produce steam
- 12. Plant like organisms
- 13. Holding areas behind dams
- 15. materials with usable amounts of metal
- 16. oil Another name for petroleum
- 17. energy Energy based on uranium
- 18. layers that hold and transfer groundwater.
- 19. A factory that separates crude oil
- 20. formed from plant material quickly burried
- 21. fuels Petroleum, natural gas, and coal
Down
- 1. Most of our water resources are found
- 2. Used to separate metal in the ore from others
- 3. Liquid rock
- 4. A solid substance found naturally in the earth
- 6. Soft, shapable
- 7. gas A fossil fuel found in a gasious state
- 8. energy Using air movement to produce energy
- 10. chemicals produced by oil
- 11. energy produced by water through turbines
- 14. Water vapor in the air