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Definition
| The process that breaks down rock and other substances at Earth's surface. |
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| 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 inoto smaller pieces. |
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| The grinding away of rock by rock particles carried by water, ice, wind, or gravity. |
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| Wedges of icd in rocks widen and deepen cracks. |
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| The process that breaks down rock through chemical changes. |
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| A material that 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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| 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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| A layer of soil that differs in color and texture from the layers above or below it. |
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| A crumbly, dark borwn soil that is a mixture of humus, clay and other minerals. |
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| Clay and other particles washed down from the A horizon, but little humus. |
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| A loose layer formed as plants shed leaves. |
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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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| The thick mass of tough roots at the surface of the soil-kept the soil in place and held onto moisture. |
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| One that is naturally replaced in a relatively short time. |
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Definition
| An area where wind erosion caused sevee loss of topsoil during the 1930s. |
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Definition
| 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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Definition
| Disturbs the soil and its plant cover as little as possible. |
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