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5 Written questions

5 Matching questions

  1. weathering
  2. humus
  3. bedrock
  4. oxidation
  5. topsoil
  1. a The breaking down of rocks and other materials on the Earth's surface.
  2. b a chemical change in which a substance combines with oxygen, as when iron oxidizes, forming rust
  3. c Mixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil.
  4. d The solid layer of rock beneath the soil
  5. e Dark-colored organic material in soil.

5 Multiple choice questions

  1. process in which sediment is laid down in new locations
  2. the loose layer of dead plant leaves and stems on the surface of the soil
  3. Soil organism that breaks down the remains of organisms and digests them.
  4. The removal of rock particles by wind, water, ice, or gravity
  5. Rich, fertile soil that is made up of about equal parts of clay, sand, and silt.

5 True/False questions

  1. soil horizonThe layer of soil that differs in color and texture from the layers above or below it.


  2. permeablecharacteristic of a material that is full of tiny, connected air spaces that water can seep through


  3. fertilityThe removal of rock particles by wind, water, ice, or gravity


  4. subsoilThe layer of soil beneath the topsoil that contains mostly clay and other minerals.


  5. mass movementearth materials deposited by erosion


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