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Ice, wind, water, gravity, plants, and animals can all be agents of ___________ _________.
mechanical weathering
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The process by which rocks break down as a result of chemical reactions is called ____________ ____________.
chemical weathering
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The arrangement of soil particles.
soil structure
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Rain, sleet, or snow that contains a high concentration of acids is called _____ _________________.
acid precipitation
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Small rocks weather more quickly than large rocks becuase they have more _________ ______ instead of volume.
surface area
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The process by which wind, water, ice, or gravity transports soil and sediment from one location to another.
erosion
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The soil quality that is based on the proportions of soil particles.
soil texture
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The removal of substances that can be dissolved from rock , ore, or layers of soil due to the passing of water.
leaching
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The grinding and wearing away of rock surfaces through the mechanical action of other rock or sand particles.
abrasion
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When oxygen in the air reacts with iron, this occurs.
oxidation
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What is it called when farmers plow across the slope of a hill to prevent erosion?
contour plowing
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What is it called when farmers change a steep field into a series of smaller, flatter fields?
terracing
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What is the practice of leaving old stalks to provide cover from the rain called?
no-till farming
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What is it called when farmers plant different cops that use different crops use different soil nutrients?
crop rotation
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Small rocks weather more quickly than larger rocks because their surface area is _________.
larger
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Chemical weathering is most rapid in areas that are
warm and wet
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These areas get some water from under the ground.
desert
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This area has low soil temperatures and little rain. Temperature, decomposition of plants and animals occurs slowly. This limits the amount of humus in the soil.
arctic
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This area has heavy rains that leach nutrients from the topsoil.
tropical rain forest
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This area has frequent changes in temperatures that lead to frost action, and the development of thick, fertile soil.
temperate forest and grassland
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