Soil Layers Worksheet
Explore the different layers of soil, their composition, and their importance in supporting ecosystems.
Includes
Standards
Topics
Soil Layers Exploration
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Refer to the diagram provided for assistance.
1. Which soil horizon is primarily composed of organic matter like decaying leaves and humus?
A Horizon
O Horizon
B Horizon
C Horizon
2. The process of water carrying dissolved minerals and nutrients downwards through soil layers is called:
Erosion
Weathering
Leaching
Decomposition
3. The horizon is often referred to as topsoil and is rich in organic matter.
4. The parent material from which soil is formed is found in the horizon.
5. The accumulation of clay and mineral deposits is characteristic of the horizon.
6. The O horizon is typically found below the A horizon.
True
False
7. Bedrock is the deepest layer of soil and is unweathered.
True
False
8. Describe the main characteristics of the B horizon.
9. Explain why the O horizon is important for plant growth.
Match each soil horizon with its primary characteristic.
10. O Horizon
a. Topsoil, rich in humus
11. A Horizon
b. Organic matter layer
12. B Horizon
c. Accumulation of minerals
13. C Horizon
d. Partially weathered parent material
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