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12 Cards in this Set
- Front
- Back
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water cycle |
how Earths water moves through the environment |
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evaporation |
the heat of the sun changes water on the earths surface to water vapor |
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condensation |
water vapor changes back into liquid water and forms clouds |
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precipitation |
any form of water that falls to the earth from clouds: rain, sleet, snow, and hail |
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transportation |
when plants give off water that is evaporated |
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nitrogen cycle |
when nitrogen in the environment is changed into a form that plants can use |
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nitrogen |
an element that all living things need |
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ammonia nitrates |
forms of nitrogen that plants are able to use |
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carbon-oxygen cycle |
how carbon and oxygen move among plants, animals, and the environment |
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respiration |
the process that releases energy from food; during this oxygen is taken (by people or animals) from the air or water and carbon dioxide is released into the environment |
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photosynthesis |
when plants use sunlight, water, and carbon dioxide to make food; during this oxygen is released into the environment |
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oxygen and carbon dioxide |
gases found in the earth atmosphere |
