BIOGEOCHEMICAL CYCLES

1. the process when bacteria converts the nitrates into oxygen gas
3. contain 97.5% of water in the biosphere
5. the area of the Earth where water movement and storage occur
7. is returned to soil or water through decomposition of biomass or excretion by consumers
10. is a process that takes away mineral components from saline water
11. cycle in which its reservoir is the air or the oceans
13. essential element for the molecules of living things
15. converts carbon dioxide gas to organic carbon
17. process of frozen water to water vapor by solar energy
18. part of the sedimentary cycle where other salts deposit out as sediment and rock in shallow seas
19. the second most abundant element in organisms
21. is second only to nitrogen in abundance among uncombined elements in the atmosphere
23. used in agriculture, which are then washed into lakes, streams, and rivers surface runoff
24. process of liquid water to water vapor by solar energy
26. characterized by excessive plant and algal growth
27. cycles between the oceans, land, and atmosphere
28. another term for living things
30. a worlwide, major environmental concern caused by the excessive amount of carbon dioxide in the atmosphere

2. process of water vapor into clouds
4. its use had accelerated in the 1800s during the industrial revolution
6. product of condensation of atmospheric water vapor that falls on the ground
8. is a process of which sulfur is falling directly from the atmosphere
9. cycle in which its reservoir is the Earth’s crust
12. enters the living world through free-living and symbiotic bacteria
14. a place where something is kept in store
16. the process of water movement through a plant and its evaporation through aerial parts
20. water inside living things
22. subsurface reservoir of fresh water
25. another term for reservoir
29. the main oxygen generators of the biosphere