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Soil Horizons (Grade 5)

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Soil Horizons

1. 
Bedrock can be found in the A horizon.
  1. True
  2. False
2. 
The B horizon is called the topsoil.
  1. True
  2. False
3. 
The A horizon is made up of minerals and humus which contain nutrients that feed plants.
  1. True
  2. False
4. 
Most plant roots grow in the C horizon.
  1. True
  2. False
5. 
                is the loose covering of weathered rock particles and decaying organic matter overlying the bedrock of Earth's surface.
  1. Humus
  2. Compost
  3. Sediment
  4. Soil
6. 
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. sunlight, animals, humus, leaching, and earthquakes.
7. 
In which horizon of a soil profile is the parent material usually found?
  1. D
  2. B
  3. C
  4. A
8. 
In which horizon of a soil profile does leaching normally occur?
  1. Horizon A
  2. Horizon D
  3. Horizon B
  4. Horizon C
9. 
What is the C horizon?



10. 
Describe the major characteristics of the R soil horizon.



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