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| PROCESS THAT BREAKS DOWN ROCKS AND OTHER SUBSTANCES AT EARTH SURFACE. |
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| IS THE MOVEMENT OF ROCK PARTICLES BY WIND, WATER,ICE,OR GRAVITY. |
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| THE TYPE OF of weathering in which rocks 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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| That splits rocks when water seeps into cracks,then freezes and expands. |
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| The process that breaks down rock through chemical changes. |
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| Characteristic of materials such as sand and gravel that allow water to pass easily through them.` |
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| Loose,weathered material on earth surface in which plants can grow. |
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| The solid layer of rock beneath the soil. |
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| Dark-colored substance that forms as plants and animals remains decay. |
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| Solid that made up of about equal parts of clay,sand,and silt. |
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| Layer soil that differ in color and texture from the layers. |
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| Acrumbly dark brownsoil that is a mixture of humus,clay,and other minerals. |
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| Consists of clay and other particles washed down from the A horizon, but little humus |
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| as plants shed leaves, they form a loose layer |
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| 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 keeps the soil in place and holds onto moisture |
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| one that is 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 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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