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AB Ch. 18 Sec.4
| Question | Answer |
|---|---|
| biogeochemical cycle | the circulation of substances through living organisms |
| groundwater | the water that is beneath the earths surface |
| water cycle | the continous movement of water between the atomosphere, the land, and oceans |
| transpiration | the process by which plants release water vapor into the air through stomata;also the release of water vapor into the air by other organisms |
| carbon cycle | the movement of carbon from the nonliving enviroment into living things and back |
| nitrogen cycle | the process by which notrogen circulates among the air,soil,water,plants,and animals in an ecosystem |
| nitrogen fixation | the process by which gaseous notrogenis converted in nitrates, compounds that organisms can use to make amino acids and other nitrogen containing organic molecules |
| nitrogen-fixing bacterium | a bacterium that converts atmospheric nitrogen into ammonia |
| ammonification | the formation of ammonia comppounds in the soil by the action of bacteria on decaying matter |
| nitrification | the process by which nitrites and nitrates are produced by bacteria in the soil |
| denitrification | the liberation of nitrogen form nitrogen-containing compounds by bacteria in the soil |
| phosphurous cycle | the cylcic movement in different chemical forms from the enviroment to organisms and then back to the enviroment |
Created by:
burkea15
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