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5 Written questions

5 Matching questions

  1. soil horizon
  2. soil
  3. topsoil
  4. ice wedging
  5. permeable
  1. a wedges of ice in rocks widen and deepen cracks
  2. b The layer of soil that differs in color and texture from the layers above or below it.
  3. c characteristic of a material that is full of tiny, connected air spaces that water can seep through
  4. d the loose, weathered material on Earth's surface in which plants can grow
  5. e Mixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil.

5 Multiple choice questions

  1. The layer of soil beneath the topsoil that contains mostly clay and other minerals.
  2. the loose layer of dead plant leaves and stems on the surface of the soil
  3. a chemical change in which a substance combines with oxygen, as when iron oxidizes, forming rust
  4. Dark-colored organic material in soil.
  5. any one of several processes by which gravity moves sediment downhill

5 True/False questions

  1. acid rainrain containing high amounts of chemical pollutants.


  2. depositionprocess in which sediment is laid down in new locations


  3. bedrockThe solid layer of rock beneath the soil


  4. decomposerSoil organism that breaks down the remains of organisms and digests them.


  5. weatheringA measure of how well soil supports plant growth.


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