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| is the process that breaks down rock and other substance 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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| it 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 the 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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| is the loose, weathered material on earths 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 remains 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 mixture of humus, clay, and other soil. |
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| unusally consists of clay and other particles washed down from the A horizon, but a 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 face of the soil-kept the soil in place and held onto moisture |
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| is one that is naturally replaced in a relatively short time |
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| was a area where wind erosion caused severe loss of the topsoil during the 1930's |
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| is the management of soil to prevent its destruction |
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| is the pratice 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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| factors of mechanical weathering are |
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| three causes of chemical weathering are |
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| water, oxygen, carbon dioxide, living organisms, and acid rain |
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| factors that cause affect the rate of weatheringare |
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