Exploring Soil Horizons
A Grade 7 science worksheet to help students understand the different layers of soil, their characteristics, and importance.
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Exploring Soil Horizons
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Read each question carefully and answer to the best of your ability. Refer to the diagram of soil horizons as needed.
Observe the diagram of soil horizons below:
1. The uppermost layer of soil, rich in organic matter, is called the horizon.
2. The B horizon is also known as the , where leached materials accumulate.
3. The parent material from which soil is formed is found in the horizon.
1. Which soil horizon is characterized by partially weathered parent material?
O Horizon
A Horizon
C Horizon
R Horizon
2. Which horizon is primarily composed of humus and topsoil?
B Horizon
A Horizon
E Horizon
R Horizon
1. The O horizon is typically found in desert environments.
True
False
2. Leaching is the process where nutrients are washed down from upper soil horizons to lower ones.
True
False
1. Briefly describe the main characteristics of the A horizon.
2. Explain why the R horizon is considered the 'bedrock' layer.
Match each soil horizon with its primary characteristic.
1. O Horizon
a. Topsoil, rich in humus
2. A Horizon
b. Organic matter layer
3. B Horizon
c. Subsoil, accumulation of minerals
4. C Horizon
d. Partially weathered parent material