Biogeochemical Cycles

2. Law of Conservation of _____________________: Energy is neither created nore destroyed
3. An underground formation that contains groundwater
6. excessive nutrients in a lake or other body of water causes a dense growth of plant life and death of animal life from lack of oxygen.
8. the state or process of rotting; decay which recycles nutrients back into the ecosystem
9. cycle __________________ cycle is how water is moved between the different spheres of the Earth.
10. scale with values from 0 to 14, used to measure the concentration of H+ ions in a solution; a _________ of 0 to 7 is acidic, a _________ of 7 is neutral, and a _________ of 7 to 14 is basic. (same term is in each blank)
12. water changes from liquid to gas and enters the atmosphere
13. the water that is beneath Earth's surface
14. __________________ cycl is the movement of phosphorus from rocks through the biosphere and hydrosphere and back to rocks.
16. nitrogen-fixing ____________________ make atmospheric nitrogen usable for plants
19. one molecule of this makes up a water molecule water; byproduct of photsynthesis and used in cellular respiration
20. Water changes from a gas to a liquid when it cools in the atmosphere; forms clouds

1. Any form of water that falls from clouds and reaches Earth's surface.
4. acidification CO2 dissolving in seawater lowers ocean pH
5. __________________ cycle is the transfer of nitrogen from the atmosphere to the ocean, to living organisms, and back to the atmosphere
7. Plants use the sun's energy to convert water and carbon dioxide into sugars
11. two of these make up water molecules
15. water that flows over the ground surface rather than soaking into the ground
17. __________________ cycle is the movement of carbon from the nonliving environment into living things and back
18. Law of Conservation of _________________: Matter is neither created nor destroyed