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| movement of water among the ocean, atmosphere, land , and living things |
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| the sun's heat causes water to change from liquid to a vapor |
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water that seeps in the ground and may stay for thousands of years
provides water to soil, streams, rivers, and ocean |
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| all organisms from tiny bacteria to animals and plants contain lots of water without water there would be no life on earth |
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| movement of carbon from the environment into living things and back into the environment |
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| process by which carbon cycles from the environment into living things. Plants use carbon dioxide from the air to make sugars. Animals get carbon from eating plants |
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| during respiration sugar molecules are broken down to release energy. Carbon dioxide and water are released as byproducts |
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the breakdown of dead materisls into carbon dioxide and water.
when fungi and bacteria decompose they return carbon to the environment |
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| movement of nitrogen from the environment and back again |
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| 78% of earth's atmosphere is nitrogen gas |
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