Term
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Definition
| Mechanical weathering occurs when physical forces break rock into smaller and smaller pieces without changing the rock's mineral composition |
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Term
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Definition
| After many freeze-thaw cycles, the rock breaks into pieces by a process called frost wedging |
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Term
| When water freezes, it volume _______. |
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Definition
| Its volume expands by about 9%, exerting a tremendous outward force. This force is great enough to burst water pipes during the winter |
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Term
| Which of the following is NOT associated with mechanical weathering ? |
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Definition
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Term
| What is chemical weathering ? |
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Definition
| Chemical weathering is the transformation of rock into one or more new compounds |
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Term
| Which of the following is the result of chemical weathering ? |
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Definition
| a rock that has been changed into one or more new compounds |
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Term
| The atmospheric gas forms a mild acid when dissolved in water is _______. |
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Definition
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Term
| what would cause the inscription on a marble gravestone to become harder and harder to read over time ? |
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Definition
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Term
| What climate does chemical weather favor the most ? |
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Definition
| Climates with high temperatures and abundant moisture |
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Term
| What are the major components of soil ? |
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Definition
a. mineral matter or broken down
b. organic matter or humus, which is decayed remains of organisms
c. water
d. air |
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Term
| A soil's texture is determined by ______. |
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Definition
| you use categories of clay, silt, and sand in the soil |
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Term
| The main source of organic matter in soil is _______. |
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Definition
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Term
| Use figure 5-1 to determine what soil is called if it has 20 percent clay, 60 percent silt, and 20 percent sand. |
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Definition
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Term
| What are the proportions of clay, silt, and sand shown at point B in figure 5-1 ? |
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Definition
| Clay 20%, silt 40%, sand 40% |
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Term
| What are the proportions of clay, silt, and sand shown ate point A in figure 5-1 ? |
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Definition
| Clay 60%, silt 20%, sand 20% |
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Term
| What are the proportions of clay, silt, and sand shown at point C in figure 5-1 ? |
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Definition
| Clay 10%, Silt 20%, sand 70% |
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Term
| A soil associated with the hot and wet tropics is _______. |
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Definition
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Term
| Pedalfer soils contains high amounts of _______. |
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Definition
| Iron oxide and aluminum- rich clays |
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Term
| The process responsible for moving material downslope under the influence of gravity is called ________. |
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Definition
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Term
| What is the force of gravity behind |
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Definition
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