Soil Profile Exploration
This worksheet explores the different layers of a soil profile, their characteristics, and their importance.
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Soil Profile Exploration
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Date:
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Read each question carefully and answer to the best of your ability. Refer to the provided diagram if necessary.
Observe the soil profile diagram below:
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 layer of weathered parent material from which soil is formed is called the:
Topsoil
Subsoil
Parent Material
Bedrock
3. The A horizon is also known as and is rich in .
4. Leaching is a process where minerals and nutrients are washed down from upper horizons to the horizon.
5. The O horizon is typically found in deserts and arid regions.
True
False
6. Bedrock is the unweathered solid rock layer beneath the soil profile.
True
False
7. Briefly describe the main characteristics of the B horizon (subsoil).
8. Explain why the O horizon is crucial for plant growth.
Match each term with its correct description.
9. O Horizon
a. Unweathered solid rock
10. A Horizon
b. Rich in organic matter, topsoil
11. C Horizon
c. Accumulation of clay and minerals
12. Bedrock
d. Partially weathered parent material
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