Term
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Definition
| the process that breaks down rocks and other substances at earths surface |
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Term
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Definition
| Is the movement of rock particles by wind water ice or gravity. |
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Term
| Mechanical/phsycal weathering |
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Definition
| the type of weathering in which rocks are physicly broken down into smaller rocks |
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Term
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Definition
| the grinding away of rocks by rock particles moved by ice wind water or gravity |
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Term
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Definition
| wedges of ice in rocks widen and deepen cracks |
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Term
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Definition
| the process that breaks down rocks through chemical changes |
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Term
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Definition
| means that a material is full of tiny connected air spaces that allows water to seep through |
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Term
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Definition
| is the loose weathered material at earths surfacein which plants can grow |
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Term
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Definition
| the solid layer of rock beaneath the soil |
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Term
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Definition
| is a dark-colored substancethat forms as plant and animal remains decay |
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Term
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Definition
| soil that is made up of equal parts of clay sand and silt |
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Term
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Definition
| is a layer of soil that differs in color and texture above or below it |
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Term
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Definition
| a crumbly,dark brownsoil that is a mixture of humus clay and other minerals |
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Term
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Definition
| usally consists of clay and other particles washed down from the A horizon but little humus |
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Term
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Definition
| the organisms that break down dead reamains and digest them with chemicals |
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Term
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Definition
| the thick mass of tough roots ath the surface ofthe soil |
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Term
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Definition
| is a resource that is naturally replaced in a relatively short time |
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Term
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Definition
| the area of the great plains where the wind erosion caused soil loss 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
| is the practice of plowing fields along the curve a slope |
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Term
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Definition
| distubs the soil and its plant cover as little as possible |
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Term
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Definition
| loose layer formed by plants shedding leaves |
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Term
| what factors cause chemical weathering? |
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Definition
| FRreezing thawing ice wind garaity abraison and animals |
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Term
| describe three causes of chemical weathering |
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Definition
| water oxygen carbon dioxide |
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Term
| what factors affect the rate of weathering |
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Definition
| the type of rock and the climate |
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Term
| what role does weathering play in the formation of soil |
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Definition
| it breaks down rocks which will become parts of the soil. |
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Term
| what are the different materials that make up soil |
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Definition
| rock particles minerals decayed or ganic material air and water |
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Term
| how do plants and animals affect the formation and compostion of soil |
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Definition
| decomposers break down decayed anmals and convert into humus and when animals die they decay and put humus in the soil. |
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Term
| explain the importance of soil as one of earths resources |
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Definition
| every living thing on earth depends directly or indirectly upon the soil |
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Term
| how did settlers on the great plain help create the Dust Bowl |
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Definition
| thry plowed up all the sod which was holding the soil in place so that all the soil could blow away |
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Term
| what are som techniques that farmers use to conserve soil |
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Definition
| they use contour plowing and conversation plowing |
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