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the process that breaks down rock and other substances at earth's surface |
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the movement of rock particles by wind, water, ice, or gravity. |
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mechanical/physical weathering |
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where rock is physically broken into smaller pieces. |
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the grinding away of rock by rock particles carried by water, ice, wind, or gravity. |
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wedges of ice in rocks widen and deepen cracks. |
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the process that breaks down a rock through chemical changes. |
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the loose weathered material on earth's surface in wich plants can grow. |
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solid layer of rock beneath the soil. |
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dark colored substance that forms as plant and animal remains decay. |
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a layer of soil that deffers in color and texture form the layers above or below it |
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a crubly, dark brown soil that is a mixture fo humus, clay, and other minerals. |
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consists of clay and other particles washed down from the A horizon. |
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the orginisms that live in soil turn dead organic material into humus. |
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thick mass of tough roots ath the surface of the soil. |
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a resource that in naturally replaced in a relatively short time. |
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an area where wind erosion caused severe loss of topsoil during the 1930's. |
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the management of soil to prevent its destruction. |
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the material is full of tiny, connected weathers chemically at a fast rate. |
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a loose layer of shedded leaves |
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the practice of plowing fields along the curves of a slope. |
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disrubs the soil and its plant cover as little as possible. |
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soil that is made up of equal parts of clay, sand, and silt |
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