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20 Cards in this Set
- Front
- Back
______________________ is the process of wind, water, ice or gravity moving soil from one place to another
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Erosion
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What are lichens?
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Tiny, plantlike organisims that produce acid and can slowly break down rock
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What is the product of weathering?
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soil
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Topsoil contains ___________ and _________________
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humus, bits of rock
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Where does most weathering of rock occur?
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Subsoil
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What dissolves nutrients in soil?
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Water
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______________ is a product that makes soil richer
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Fertilizer
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Soil rich in nutrients and provides the right conditions for plants to grow is___________
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Fertile
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___________ and ___________ are properties of soil
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Color; texture
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Which soil contains equal amounts of sand, silt, and clay and are best for growing crops?
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Loam
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What are the three main layers of soil?
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Topsoil, subsoil and bedrock
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_____________ is the process that breaks up rock
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Weathering
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What are three farming methods to save soil?
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contour plowing, strip cropping and terracing
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The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is called
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abrasion
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Ice wedging causes mechanical weathering of rock by means of
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Freezing and thawing of water
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What kind of weathering causes the mineral composition of rocks to change?
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Chemical weathering
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Chemical weathering occurs more rapidly in what type of climate?
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Warm and wet climates
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The most important factors in determining the rate of weathering
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rock type and climate.
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Soil formation begins with the weathering of ___________.
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bedrock
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What is humus?
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Decaying organic matter
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