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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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Definition
| the type of weathering in wich 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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Definition
| wedges of ice in rocks widen and deepen cracks. |
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Definition
| the process that breaks down rock through chemical changes. |
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| a material 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 wich plants can grow. |
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| the solid layer of rock beneath the soil. |
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Definition
| a dark-colored substance that forms as plants 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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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,soilthat is a mixture of humus,clay,and other minerals. |
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Definition
| the layer of soil beneath the topsoil that contains mostlyl clay and other minerals. |
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Definition
| the loose layer of dead plant leaves and stems on the surface of the soil. |
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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 naturally replaced in a relatively short time. |
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Definition
| the area of the Great Plains where wind erosion caused soil loss during the 1930s. |
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Definition
| the management of soil to prevent its destruction. |
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Definition
| 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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Term
| What factors cause mechanical weathering? |
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Definition
| release of pressure,freezing and thawing,plant growth,abrasion,and animal actions. |
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| Describe three causes of chemical weathering. |
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Definition
| It produces rock particles that have a different mineral makeup from the rock they came from.Water,oxygen,carbon dioxide,living organisms,and acid rain. |
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| What factors affect the rate of weathering? |
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Definition
| The type of rock and 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
| becuase chemical reactions occur faster in high temperatures. |
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Term
| What role does weathering play in the formation of soil? |
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Definition
| Soil forms as rock is broken down by weathering and mixes with other materials on the surface. |
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