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5 Written questions

5 Matching questions

  1. sediment
  2. litter
  3. soil horizon
  4. loam
  5. topsoil
  1. a Mixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil.
  2. b earth materials deposited by erosion
  3. c the loose layer of dead plant leaves and stems on the surface of the soil
  4. d The layer of soil that differs in color and texture from the layers above or below it.
  5. e Rich, fertile soil that is made up of about equal parts of clay, sand, and silt.

5 Multiple choice questions

  1. The layer of soil beneath the topsoil that contains mostly clay and other minerals.
  2. rain containing high amounts of chemical pollutants.
  3. characteristic of a material that is full of tiny, connected air spaces that water can seep through
  4. the grinding away of rock by other rock particles carried in water, ice, or wind
  5. A measure of how well soil supports plant growth.

5 True/False questions

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

          

  2. soilMixture of humus, clay, and other minerals that forms the crumbly, topmost layer of soil.

          

  3. bedrockThe solid layer of rock beneath the soil

          

  4. mass movementany one of several processes by which gravity moves sediment downhill

          

  5. humusRich, fertile soil that is made up of about equal parts of clay, sand, and silt.

          

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