Term
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Definition
| the process that breaks down rock and other substances at Earth's surface. |
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Term
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Definition
| the movement of rock particles by wind, water,ice, or gravity. |
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Term
Mechanical Weathering-
or
Physical Weathering- |
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Definition
| the type of weathering in which rock is physically broken into smaller pieces. |
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Term
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Definition
| the grinding away of rock by rock particles carried by water, ice, wind, or gravity. |
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Term
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Definition
| When water seeps into a crack, freezes when the temperature drops, expands when it freezes, and crackes the ice apart as it forms into a wedge. |
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Term
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Definition
| the process that breaks down rock through chemical changes. |
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Term
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Definition
| that a material is full of tiny, connected air spaces that allow water to seep through it. |
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Term
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Definition
| the loose, weathered material on Earth's surface in which plants can grow. |
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Term
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Definition
| the solid layer of rock beneath the soil. |
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Term
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Definition
| soil that is made up of about epual parts of clay, sand, and silt. |
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Term
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Definition
| a layer of soil that differs in color and texture from layer above or below it. |
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Term
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Definition
| a crumbly, dark brown soil that is a mixture of humus, clay, and other minerals. |
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Term
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Definition
| the sheded leaves of plants that form a loose layer. |
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Term
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Definition
| the organisms that break the remains of dead organisms into smaller pices and digest them with chemicals. |
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Term
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Definition
| the thick mass of tough roots at the surface of the soil. |
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Term
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Definition
| a resource that is naturally repllaced in a relatively short time. |
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Term
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Definition
| an area where wind erosion caused severe loss of topsoil during the 1930s. |
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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 field 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
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Definition
| a dark-colored substance that forms as plant and animal remains decay. |
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Term
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Definition
| usually consists of clay and other particles washed down from the the topsoil little humus |
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Term
| What factors cause mechanical weathering? |
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Definition
| By freezing and thawing, release of pressure, growth of plants, actions of animals, and abrasion. |
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Term
| Describe three causes so chemical weathering. |
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Definition
| they include water, oxygen, carbon dioxide, living organisms, and acid rain. |
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