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5 Written questions

5 Matching questions

  1. humus
  2. ice wedging
  3. subsoil
  4. soil horizon
  5. erosion
  1. a The removal of rock particles by wind, water, ice, or gravity
  2. b Dark-colored organic material in soil.
  3. c The layer of soil that differs in color and texture from the layers above or below it.
  4. d wedges of ice in rocks widen and deepen cracks
  5. e The layer of soil beneath the topsoil that contains mostly clay and other minerals.

5 Multiple choice questions

  1. A measure of how well soil supports plant growth.
  2. characteristic of a material that is full of tiny, connected air spaces that water can seep through
  3. The solid layer of rock beneath the soil
  4. Rich, fertile soil that is made up of about equal parts of clay, sand, and silt.
  5. process in which sediment is laid down in new locations

5 True/False questions

  1. oxidationa chemical change in which a substance combines with oxygen, as when iron oxidizes, forming rust


  2. weatheringearth materials deposited by erosion


  3. litterthe loose layer of dead plant leaves and stems on the surface of the soil


  4. decomposerprocess in which sediment is laid down in new locations


  5. acid rainrain containing high amounts of chemical pollutants.


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