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  1. From the land surface downward to the unweathered bedrock, which of the following is the correct order of the different soil horizons?
  2. Which one of the following is an important, mechanical weathering process for enlarging fractures and extending them deeper into large boulders and bedrock?
  3. Which of the following is/are most susceptible to chemical weathering by dissolution?
  4. Which of the following best describes sets of fractures in relatively fresh bedrock, such as granite, that are roughly parallel to the land surface?
  5. What two factors speed up rates of chemical reaction and weathering in rocks and soils?
  6. The finely divided, red, brown, and yellow soil-coloring minerals originate by what process?
  7. In which area would weathering by frost wedging probably be most effective?
  8. Which of the following best describes the "Dust Bowl"?
  9. Lateritic soils form under what climatic conditions?
  10. In which area are pedocal soils most likely to be found?
  11. Which one of the following statements best describes erosion?
  12. Which of the following best describe the A soil horizon?
  13. Which term best describes an accumulation of angular rock fragments at the base of a steep, bedrock slope or cliff?
  14. What mineral particles are the dominant coloring agents in reddish, brownish, and yellowish soils?
  15. Clay minerals formed from gabbro or diorite bedrock illustrate which kind of weathering?
  16. Which term describes a soil formed by weathering of the underlying bedrock?
  17. Which term best describes those processes that move weathered rock materials and soils downslope?
  18. Under similar warm, moist climatic conditions, why would basalt and gabbro generally have higher chemical weathering rates than rhyolite and granite?
  19. Why is the humus layer typically thicker in a cool, temperate forest soil than in a tropical rainforest soil?
  20. What portion of an angular, fracture-bounded granitic block shows the highest rate of weathering?
  1. a Less humus is produced in the cool, temperate forest but the rate of decay and oxidation is slower than in a tropical rainforest.
  2. b leaching zone
  3. c in moist, temperate climates
  4. d mass wasting
  5. e sheeting fractures
  6. f a tropical rainforest in the Amazon Basin of Brazil
  7. g dust-sized grains of iron oxides
  8. h The ferromagnesian minerals in the gabbro and basalt are subject to oxidation and chemical breakdown.
  9. i warm and moist as in a wet, tropical forest
  10. j residual
  11. k talus slope
  12. l areas of severe wind erosion on the Great Plains, 1930s
  13. m frost wedging
  14. n 0, A, E, B, C, bedrock
  15. o warm temperatures; very moist
  16. p chemical
  17. q calcite
  18. r precipitation of iron oxides during the chemical weathering process
  19. s the process by which weathered rock and mineral particles are removed from one area and transported elsewhere
  20. t the edges and corners