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| Weathering is the process that breaks down rock and othe substances at Earth's surface. |
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| Erosion is the movement of rock particles by wind, water, ice, or gravity. |
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| Mechanical Weathering is the type of weathering in which rock is hysically broken into smaller pieces. |
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| Abrasion 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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| Permeable means that a material is full of tiny, connected air spaces that allow water to seep through it. |
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| Soil is the loose, weathered material on Earth's surface in which plants can grow. |
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| Bedrock 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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| is soil that is made up of 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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| The top layer of soil that is mixture of humus, clay, and other minerals. |
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| is usally clay and other particles that have been washed out from the layer above it which is topsoil. |
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| Plants shed leaves forming this. |
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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. |
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| is a resource that can be replaced easily naturally. |
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| was an area where severe wind erosion of topsoil accorded in the 1930's. |
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| is the management of soil to prevent it's 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 it s plant cover as little as possible. |
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