3B Izaiah Miles

4. Plants and animals need this element to make DNA, amino acids and proteins.
8. the emission of water vapor from the leaves of plants
9. the total amount of living matter in a given unit area
11. a biogeochemical process through which nitrogen is converted into many forms
12. the continuous movement of water on, above and below the surface of the Earth.
14. 97% of the earth's water is
16. the formation of organic nitrogen compounds like amino acids from inorganic nitrogen compounds present in the environment.
18. change into gas or steam
19. A chemical element that is essential to all living things

1. Plants can change carbon dioxide to carbohydrates by
2. the process of removing the nitrates or nitrites from (soil, air, or water) by chemical reduction.
3. a periodically repeated sequence of events
5. the process of converting (ammonia or another nitrogen compound) into nitrites or nitrates.
6. the falling to earth of any form of water
7. a chemical process by which molecular nitrogen (N 2) in the air is converted into ammonia
9. They constitute a large domain of prokaryotic microorganisms.
10. This is the largest reservoir of carbon on Earth.
13. Most of water on Earth is
15. the chemical element with the symbol N and atomic number 7.
17. decomposition with production of ammonia or ammonium compounds