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| The process that breaks down rock and toher substances at Earth's surface. |
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| The type of weathering in which rock is physically broken into 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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| The movement of rock particles by wind, water, ice, 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 chemcial changes. |
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| Characteristic of materials such as sand and gravel that allow water to pass easily through them. |
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| The loose, weathered materical 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 brown soil that is a mixuture of humus, clay, and other minerals. |
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| usually consists of clay and other particles washed down from the A horizon, but little humus. |
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| The loose layer of dead plant leaves and stems on the surface of the soil |
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| The organsisms 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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| One that is naturally replaced in a relatively short time. |
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| An area where wind erosion caused severe loss of topsoil during the 1930's. |
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| 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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| Soil conservation method in which the dead stalks form the previous year's crop are left in the ground to hold the soil in place. |
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| factors that cause mechanical weathering |
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Definition
| freezing and thawing, release of pressure, growth of plants, and actions of animals. |
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| Describe three causes of chemical weathering |
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Definition
three causes of chemical weathering are
1.water:Water is the most important agent of chemical weathering. Water weathers rock by dissolivng it. When a rocdk or other substance dissolves in water, it mixes uniformly throu out the water to make a slo |
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