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Weathering & Soil
Weathering & Soil Formation
| Question | Answer |
|---|---|
| Weathering | The process by which natural forces break down rocks. (p. 115) |
| Mechanical Weathering | The breakdown of rock into smaller pieces of the same material without any change in its composition. (p. 116) |
| Ice Wedging | Occurs when water freezes and expands in the cracks and pores of rock, creating a force strong enough to split the rock apart. (p.116) |
| Exfoliation | In geology, the process in which layers or sheets of rock gradually break off. (p. 116) |
| Abrasion | The process of wearing something down by friction. (p. 116) |
| Chemical Weathering | The breakdown or decomposition of rock that takes place when minerals change through chemical processes. (p. 118) |
| Humus | The decayed organic matter in soil. (p. 123) |
| Soil Horizon | A soil layer with physical and chemical properties that differ from those of soil layers above and below it. (p. 124) |
| Soil Profile | The soil horizons in a specific locations: a cross section of soil layers that displays all soil horizons. (p. 124) |
| Desertification | The expansion of desert conditions in areas where the natural plant cover has been destroyed. (p. 133) |
| Climate | Causes tropical, desert, temperate, and arctic soils to have different characteristics. |
| Rate | Composition and surface area both affect the ______ at which a rock breaks down. |
| Crop rotation | A form of soil conservation when once every few years, a farmer plants bean crops instead of wheat in her fields. |
Created by:
hagnejo
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