Weathering and Soils
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| (T/F) The term mechanical weathering refers to changes in a rock that are physical; there is little or no chemical change. | show 🗑
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| show | False
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| show | True
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| (T/F) Plants, such as roots growing in cracks, and animals compacting the soil, have little influence on mechanical weathering. | show 🗑
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| (T/F) Without chemical weathering, the elevated levels of carbon dioxide in the atmosphere would have long ago made the Earth too hot to sustain life. | show 🗑
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| show | False
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| show | True
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| show | True
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| show | False
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| (T/F) The B-horizon in soil is the zone of accumulation. | show 🗑
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| (T/F) Sand-size grains of feldspar can be preserved in a soil profile over great time periods because of feldspar's resistance to chemical weathering. | show 🗑
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| show | Erosion
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| _______ refers to the group of destructive processes that change the physical and chemical character of rocks at the Earth's surface. | show 🗑
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| show | along contacts between mineral grains
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| show | Soil
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| Water that has trickled down into a joint in a rock can freeze, expand, and _____. | show 🗑
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| Frost wedging is most effective __. | show 🗑
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| show | sheet joints
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| show | carbon cycle
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| show | carbon dioxide
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| _______ are commonly left after complete chemical weathering. | show 🗑
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| What, in terms of Earth systems, forms an essential interface between the geosphere, biosphere, hydrosphere, and atmosphere? | show 🗑
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| show | a clay mineral
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| show | Quartz
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| Olivine weathers rapidly because its isolated silicon-oxygen tetrahedra are held together by _________ ionic bonds to iron and magnesium. | show 🗑
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| show | O
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| show | A
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| The _____ horizon is the incompletely weathered parent material lying below the B-horizon | show 🗑
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| As soils mature, distinct layers called ______ appear. | show 🗑
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| show | bauxite
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| show | quartz
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| Plants and burrowing organisms contribute to soil development by __. | show 🗑
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Created by:
Thomas.Siu
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