Across
- 4. turning liquid into vapor
- 7. algae that is invisible to the naked eye
- 11. 3% of the earths water is
- 15. warming of earths system
- 18. the opposite of nitrification
- 19. air that surrounds earth
- 20. when a organism creates waste or dies
- 21. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
Down
- 1. water that falls from clouds
- 2. when water falls back into the atmosphere
- 3. the water sphere
- 5. when burned releases carbon dioxide
- 6. neeed nitrogen to grow
- 8. one of the 4 sphered (living things)
- 9. when rain flows along a surface, into lake,rivers,and streams
- 10. gas that is released from plants
- 12. 97% of earths water is
- 13. starts with a o and carbon moves it
- 14. acid made by nitrogen
- 16. the land sphere
- 17. shortened version of carbon