Soil Horizons Diagram (Grade 9)
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Soil Horizons Diagram
Use the soil horizons diagram to answer the questions below.
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1.
Layer A is the and consists mainly of .
- A-horizon; topsoil
- B-horizon; humus
- R-horizon; topsoil
- O-horizon; humus
2.
Layer B is the and consists mainly of .
- A-horizon; topsoil
- B-horizon; humus
- C-horizon; topsoil
- O-horizon; humus
3.
Layer C is the and consists mainly of .
- A-horizon; rock fragments
- B-horizon; subsoil
- C-horizon; rock fragments
- R-horizon; subsoil
4.
Layer D is the and consists mainly of .
- B-horizon; bedrock
- C-horizon; rock fragments
- O-horizon; bedrock
- R-horizon; rock fragments
5.
Layer E is the and consists mainly of .
- A-horizon; rock fragments
- C-horizon; bedrock
- O-horizon; rock fragments
- R-horizon; bedrock
6.
This letter represents the layer of soil consisting of very decomposed organic matter mixed with minerals.
- A
- B
- C
- D
- E
7.
The parent material for the soil shown in the diagram generates from which layer?
- A
- B
- C
- D
- E
8.
Which letter represents the layer of soil that typically accumulates clay as well as fine organic material?
- A
- B
- C
- D
- E
9.
Which letter represents the soil layer that tends to be the richest in organic materials?
- A
- B
- C
- D
- E
10.
In some regions, the E-horizon or leached layer, accumulates light colored minerals from the downward peculation of water. The E-horizon would usually be located directly above which layer in the diagram?
- A
- B
- C
- D
- E
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