Across
- 3. Energy made by flowing water.
- 4. Gasses in the earth's atmosphere that traps heat.
- 6. Found deep in the earth and drilled to extract.
- 7. Produced by burning fuel for power through chemical reactions and from leaks from industrial processes or equipment.
- 11. The energy generated during nuclear fission.
- 14. A layer in the earth's stratosphere which absorbs most of the ultraviolet radiation from reaching the sun.
- 15. The process of converting waste materials into new materials and objects.
- 19. Energy sources in which they do not replenish themselves.
- 20. Energy from any material that comes from plants or microorganisms that were recently living.
- 21. Flowing waters.
- 22. Nonrenewable sources of energy that form within the earth over millions of years.
Down
- 1. Energy sources which naturally renew or replenish themselves over a period of time.
- 2. The destruction of something by natural elements like water,fire,and wind.
- 5. Fossilized carbon,A mineral formed from plants that have been fossilized.
- 8. Energy obtained from harnessing the wind from windmills or wind turbines.
- 9. To use again and again.
- 10. Thick black liquid extracted through drilling.
- 12. Energy from the sun.
- 13. A liquid found in rock strata below earth's surface.
- 16. To up keep of a natural resource to prevent it from disappearing.
- 17. To replenish or make again.
- 18. Heat energy from deep within the earth.