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| is the processthat breaks downrock and other substances at earths suface |
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| is the movement of rock particlesby wind watericce or gravity |
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| the type of weathering in which smaller is physically broken down into smaller peices |
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| refers to the grinding away of rock by particales carried by water ice wind or gravity |
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| wedges of ice widen and deepen th e crack |
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| is the process that breaks down rock by 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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| is the loose weathered material on earths suface in which plants can grow |
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| is the solid layer of rock beneath the surface |
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| is a dark colored substance that forms as plants and animals remains decay |
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| is a layer of soil that differs in color and texture from the layer above or below it |
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| is a crumly dark brown soil that is a mixtuer of humus clay and other minerals |
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| ussaly consist of clay and other particals washed down from A horizon but little humus |
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| as plants shed leaves they form a loose layer |
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| the organisms that break down the remains of dead organisms into smaller peices and digest them with chemical |
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| the thick mass of tough root at the surface |
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