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Common-Core/ Grade 2
Science MCQ Based On Changes on earth s surface erosion
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Common-Core Grade 2 - 2 Changes on earth s surface erosion
erosion
With each horizon having a different texture and composition, the mature soils are arranged in a series of zones called soil horizons. These horizons differ with the different types of soil.
Erosion
agriculture
The soil profile helps to identify the special features present in the soils; it is a cross-sectional view of the horizon in a soil. While studying and analysing soil pollution caused by different soils, the soil profile can be an important aspect.
In the progress of soils, climate and time play a vital role. Soils develop very slowly in tremendously dry or cold climates, while the soil progresses more speedily in warm and humid climates due to favourable climatic conditions.
Soft parent material may develop into 1 cm of soil under ideal climatic conditions within 15 years. It may require hundreds of years for hard parent material under poor climatic conditions to develop into the soil.
Basically, the soil consists of four horizons. O-horizon is the top layer, A-horizon is the uppermost layer of soil, the B-horizon that contains less organic matter is named subsoil and then comes the C-horizon, which is the area below the subsoil.
Human activities such as deforestation and agriculture are also responsible for soil erosion.
Soil erosion
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