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| is the process that breaks down rock and other sudstances at Earth's surface. |
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| is the movement of rock particles by wind,water,ice,or gravity. |
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| The type of weathering in which rock is physically broken into smaller pieces. |
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| refers to 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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| is the process that breaks down rock through chemical changes. |
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| means that a material is full of tiny, connected air spaces that allow to seep through it. |
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| is the loose,weathering material on Earth's surface in which plants can grow. |
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| is the solid layer of rock beneath the soil. |
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| is a dark-colored substance that forms as plant and animal remain decay. |
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| Soil that is made up of about equal parts of clay,sand,and silt. |
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| is a layer of soil that differs in color and texture from the layers above or below it. |
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| a crumbly,dark brown soil that is a mixtureof humus,clay,and other minerals. |
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| usually,contists of clay and other particles washed down from the topsoil,but little humus. |
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| As plants shed leaves,they form a loose layer. |
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| are the organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals. |
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| the thick mass of tough roots at the surface of the soil-kept soil in place and heldonto moisture. |
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| is one that is naturally replaced ina relatively short time. |
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| was an area where wind erosion caused severe loss of topsoil during the 1930s. |
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| is the management of soil to prevent its destruction. |
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| is the practice of plowing fields along the curves of a slope. |
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| disturbs the soil and its plant cover as little as possible. |
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