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Definition
| the process that breaks down rock and other substances at earth's surface |
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| the movement of rock particles by wind,water,ice ,or gravity |
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| the type of weathering in which rock is physically broken into smaller peices |
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| the grinding away of rock by rock particles carried by water,ice,wind, or gravity |
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| wedges of ice in rocks that widen and deepen cracks |
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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 alow water to seep through it |
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| the loose, weathered material 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 plants and animals 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 mixture of humus, clay, and other minerals |
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| consists of clay and other particles washed down from the horizion, but little humus |
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| a loose layer formed when plants shed leaves |
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| the organisms that break the remains of dead organisms into smaller peices and digest them with chemicals |
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| a 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 managment of soil to prevent its destruction |
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| the practice of plowing feilds along the curves of a slope |
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| disturbs the soil and its plant cover as little as possible |
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| factors that cause mechanical weathering |
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Definition
| water, ice, wind, or gravity |
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| three causes of chemical weathering |
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Definition
| freezing and thawing, release of pressure, and growth of plants |
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| factors that affect the rate of weathering |
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| why chemical weathering occurs faster in hot,wet climates then incool,dry climates |
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Definition
| it reacts much faster in high temperatures and in moist wet areas |
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Term
| the roll that weathering plays in the formation of soil |
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Definition
| where weathering occurs rapidly is where soil formation is much faster and where it isnt so rapid is where it happens slowly |
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Term
| the different materials that make up soil |
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Definition
| rock particles, minerals, decayed organic material, air, and water |
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