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Definition
| is the process that breaks down rock and other substances at Earth's surface. |
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| the movement of rock and particles by wind, water, ice, or gravity |
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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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| When the ice melts, the water seeps deeper into the cracks. with repeated freezing and thawing the cracks slowly expand until pieces of rock break off. |
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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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| loose weathered material on Earth's surface in which plants 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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| 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 mixture of humus, clay, and other materials |
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| usually consists of clay and other particles washed down from the topsoil |
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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 |
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| a resource 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 it's destruction |
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| soil that is made up of about equal parts of clay, sand, and silt |
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| 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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| What factors cause mechanical weathering? |
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Definition
| Release of pressure, Freezing and Thawing, Plant growth, Abrasion, Animal Actions |
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| Describe three causes of chemical weathering |
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Definition
| Oxygen causes metal to rust, Water Dissolves the rocks over time, and Carbon Dioxide disolves in rainwater and forms a weak acid called Carbonic Acid |
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| What factors affect the rate of weathering? |
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| Type of rock and the Climate |
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| Explain why chemical weathering occurs faster in hot, wet climates than in cool dry climates. |
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Definition
| Chemical reactions occur faster in hotter temperatures and water is needed for chemical changes |
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