Across
- 1. Chemical formula - P
- 5. Cycle that releases carbon dioxide
- 7. Chemical formula - C
- 9. Nitrogen compounds oxidizing into nitrite and nitrate
- 11. Chemical formula - H
- 14. Water above ground
- 15. Cycle
- 16. Loss or removal of nitrogen
- 17. Vapor cooling
Down
- 2. Rain
- 3. Chemical formula - O
- 4. Water turning into vapor
- 6. Cycle that renews water
- 8. Water stored underground
- 10. Evaporation from plants
- 12. Chemical formula - N
- 13. Snow/ice turning into a vapor