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vocab
cycles of nature
| Term | Definition |
|---|---|
| water cycle | model describing how water moves from earth's surface to the atmosphere and back to the surface again through evaporation condensation and precipitation. |
| evaporation | the process that takes place when a liquid changes to a gas. |
| condensation | the process that takes place when a gas changes to a liquid. |
| nitrogen cycle | model describing how nitrogen moves from the atmosphere to the soil to living organisms and then back to the atmosphere. |
| nitrogen fixation | process which some types of bacteria in the soil change nitrogen gas into a form of nitrogen that plants use. |
| carbon cycle | model describing how carbon molecules move between the living and nonliving world. |
| why do plants and animals and other organism require nitrogen | nitrogen helps plants and animals and other organism build cells. |