Soil Horizons Exploration
A Grade 10 science worksheet exploring the layers and characteristics of soil horizons.
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Soil Horizons Exploration
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Read each question carefully and provide your best answer. Refer to the provided diagram if necessary.
Observe the diagram below illustrating the different soil horizons.
1. Which soil horizon is primarily composed of organic matter like decaying leaves and humus?
A horizon
B horizon
O horizon
C horizon
2. Which soil horizon is also known as the 'subsoil' and accumulates clay, iron, and aluminum leached from above?
O horizon
A horizon
B horizon
R horizon
3. The parent material from which soil is formed is found in the horizon.
4. Water soluble minerals and organic matter are often leached from the A horizon and accumulate in the horizon.
5. The topmost layer of mineral soil, rich in humus and biological activity, is called the horizon.
6. The R horizon consists of unweathered bedrock.
True
False
7. The E horizon is typically found in all soil profiles and is characterized by accumulation of clay.
True
False
8. Describe the primary difference between the A horizon and the B horizon in terms of their composition and characteristics.
9. Explain the process of eluviation and illuviation, and identify which soil horizons are primarily affected by each process.