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Definition
| the process that breaks down rock and other substances at Earth's surface. |
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Definition
| the movement of rock particles by wind, water, ice, or gravity. |
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Term
| mechanical weathering (physical) |
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Definition
| the type of weathering in which rock is physically broken into smaller peices. |
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Definition
| refers to the gring away of rock by rock particles carried by ice, wind, water or gravity. |
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Definition
| the process that splits rock when water seeps into cracks, then freezes and expands. |
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Definition
| the process that breaks down rock through chemical changes. |
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Definition
| means that a material is full of tiny, connected air spaces that allow water to seep through it. |
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Definition
| the loose, weathered material on Earth's surface in which plants can grow. |
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Definition
| the solid layer of rock beneath the soil. |
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Definition
| a dark-colored substance that forms as plant and animal remains decay. |
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Definition
| a layer of soil that differs in color and texture from the layers above or below it. |
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Definition
| a crumbly, dark brown soil that is a mixture of humus, clay and other minereals. |
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Definition
| usually consists of clay and other particles washed down from the A horizon, but little humus. |
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Definition
| a loose layer of leaves on the ground. |
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Definition
| the organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals. |
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Definition
| the thick mass of tough roots at the surface of the soil. |
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Definition
| one that is naturallay replaced in a relitively short time. |
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Definition
| soil that is made up of about equal parts of clay, sand and silt. |
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Term
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Definition
| was an area where wind erosion caused severe loss of topsoil during the 1930's. |
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Term
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Definition
| the management of soil to prevent its destruction. |
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Term
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Definition
| the practice of plowing feilds along the curves of a slope. |
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Term
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Definition
| disturbs the soil and its plant cover as little as possible. |
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Term
| factors that cause mechanical weathering |
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Definition
| release of pressure, freezing and thawing, plant growth, abrasion, and animal actions. |
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Term
| three causes of chemical weathering |
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Definition
| oxygen, water and acid rain |
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Term
| factors that effect the rate of weathering |
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Definition
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