Weathering and Soil

7. does not come from living organisms; in soil, the portion made up of rock and mineral
8. soil that forms from the bedrock upon which it lies
11. a form of weathering that changes rock, in which minerals formed at high temperatures and pressures change to minerals that are stable at the Earth’s surfaceerosion
12. the entire set of soil layers or horizons for a particular soil
13. a form of mechanical weathering that occurs whenever one rock hits another
14. an individual layer of a complete soil profile; examples include A, B, and C horizons
15. the most fertile layer of soil, where humus, plant roots, and living organisms are found

1. the B horizon of a soil; the zone where iron oxides and clay minerals accumulate
2. slightly less fertile soil that forms in drier, grassland regions
3. nutrient-poor, red, tropical soil that forms in a region with rainforest vegetation
4. the partially decayed remains of plants and animals that forms the organic portion of soil
5. soil formed from weathered components that have been transported by water, wind, or ice to a different area
6. form of mechanical weathering that occurs as water expands when it freezes, wedging apart rockmechanicalweathering
9. soil texture that forms from a roughly equal combination of sand, silt, and clay
10. fertile, dark soil that forms in mid-latitude, forested regions