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Definition
| the process that breaks down rocks and other substances at earth's surface |
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| the movement of rock particles by wind,water,ice,or gavity |
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| the type of weathering in which is physically broken into smaller pieces |
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| the grinding away of 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 rock through chemical changes |
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| means that a material is full of tiny,connected air spaces that allow water to seep through it |
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| the loose,weathered material on Earth's surface in which plants can grow |
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| the solid layer of rock beneath the soil |
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| Dark-colored organic material in the soil |
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| Rich fertile soil that is made up of about parts clay, sand, and silt |
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| 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 mixture of humus, clay, and other minerals |
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| usualy consists of clay and other particles washed down from A horizon, but little humus |
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| the organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals |
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| a loose layer plants form when they shed leaves |
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| thick mass of tough roots at the surface of the soil |
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| one that is naturally replaced in in a relatively short time |
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| an area where wind erosion caused severe loss of topsoil during the 1930s |
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| the practice of plowing fields along the curves of a slope |
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Definition
| the management of soil to prevent its destruction |
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| disturbs the soil and its plant covers as little as possible |
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