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Soil Horizons (Grade 5)

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Soil Horizons

Bedrock can be found in the A horizon.
  1. True
  2. False
The B horizon is called the topsoil.
  1. True
  2. False
The A horizon is made up of humus which contains nutrients that feed plants.
  1. True
  2. False
Most plant roots grow in the C horizon.
  1. True
  2. False
                is the loose covering of weathered rock particles and decaying organic matter overlying the bedrock of the Earth's surface.
  1. humus
  2. compost
  3. sediment
  4. soil
The five factors that determine how soils develop are:
  1. parent material, climate, vegetation, landscape, and time
  2. animals, humus, weather, leaching, and volcanoes
  3. sun, animals, humus, leaching, and earthquakes
In which horizon of a soil profile is the parent material usually found?
  1. D
  2. B
  3. C
  4. A
In which horizon of a soil profile does leaching normally occur?
  1. Horizon A
  2. Horizon D
  3. Horizon B
  4. Horizon C
What is the C horizon?

Describe the major characteristics of the R soil horizon.

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