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Practice Quiz or MCQ (Multiple Choice Questions) with solutions are available for Practice, which would help you prepare for chapter Physical Feature of India, Class 9, SST Geography. You can practice these practice quizzes as per your speed and improvise the topic.
Q.
Which of the following is responsible for the variation in the colour of soil in different parts of India?
- a)Difference in rock formations
- b)Weathering
- c)Erosion and deposition
- d)Land use
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Practice Quiz or MCQ (Multiple Choice Questions) with solutions are av...
The soil is one of the important components of the sustainability of an ecosystem because it is the vitally important natural medium for the growth of vegetation. It can be defined as, the upper layer of earth in which plants grow, a black or dark brown material typically consisting of a mixture of organic remains, clay, and rock particles. Here, we are giving brief note on the major factors which are responsible for the formation of the Soil.
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Explanation:
The variation in the color of soil in different parts of India is primarily due to the difference in rock formations. The color of soil is determined by the composition of the parent rock material, which varies across different regions of the country.
Difference in Rock Formations:
- India is geologically diverse, with different regions having different types of rocks. These rocks contain various minerals and organic matter that contribute to the color of the soil.
- For example, in regions where there are limestone or dolomite rock formations, the soil tends to be light gray or white in color. This is because these rocks are composed of calcium carbonate, which gives the soil a light appearance.
- In areas with sandstone or shale formations, the soil may be reddish or brown in color. This is due to the presence of iron oxide minerals, such as hematite or goethite, which impart a reddish hue to the soil.
- Similarly, regions with basaltic rock formations may have black or dark brown soils, as basalt is rich in ferromagnesian minerals like pyroxene and olivine.
Other Factors:
While rock formations play a significant role in determining soil color, other factors such as weathering, erosion and deposition, and land use can also influence the color to some extent:
- Weathering: The breakdown of rocks into smaller particles through physical and chemical processes can alter the color of the soil. For example, the weathering of limestone may result in the formation of clay minerals, which can give the soil a reddish or yellowish color.
- Erosion and Deposition: The movement of soil particles by wind or water can lead to the mixing of soils from different areas, resulting in variations in color.
- Land Use: Human activities such as agriculture, deforestation, or construction can modify the composition and color of the soil. For instance, the addition of organic matter through farming practices can darken the soil, while the removal of vegetation can lead to soil erosion and a loss of topsoil, altering its color.
However, it is the difference in rock formations that primarily determines the variation in soil color across different parts of India.
The variation in the color of soil in different parts of India is primarily due to the difference in rock formations. The color of soil is determined by the composition of the parent rock material, which varies across different regions of the country.
Difference in Rock Formations:
- India is geologically diverse, with different regions having different types of rocks. These rocks contain various minerals and organic matter that contribute to the color of the soil.
- For example, in regions where there are limestone or dolomite rock formations, the soil tends to be light gray or white in color. This is because these rocks are composed of calcium carbonate, which gives the soil a light appearance.
- In areas with sandstone or shale formations, the soil may be reddish or brown in color. This is due to the presence of iron oxide minerals, such as hematite or goethite, which impart a reddish hue to the soil.
- Similarly, regions with basaltic rock formations may have black or dark brown soils, as basalt is rich in ferromagnesian minerals like pyroxene and olivine.
Other Factors:
While rock formations play a significant role in determining soil color, other factors such as weathering, erosion and deposition, and land use can also influence the color to some extent:
- Weathering: The breakdown of rocks into smaller particles through physical and chemical processes can alter the color of the soil. For example, the weathering of limestone may result in the formation of clay minerals, which can give the soil a reddish or yellowish color.
- Erosion and Deposition: The movement of soil particles by wind or water can lead to the mixing of soils from different areas, resulting in variations in color.
- Land Use: Human activities such as agriculture, deforestation, or construction can modify the composition and color of the soil. For instance, the addition of organic matter through farming practices can darken the soil, while the removal of vegetation can lead to soil erosion and a loss of topsoil, altering its color.
However, it is the difference in rock formations that primarily determines the variation in soil color across different parts of India.
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Practice Quiz or MCQ (Multiple Choice Questions) with solutions are av...
As India has different climate and variation
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Practice Quiz or MCQ (Multiple Choice Questions) with solutions are available for Practice, which would help you prepare for chapter Physical Feature of India, Class 9, SST Geography. You can practice these practice quizzes as per your speed and improvise the topic.Q.Which of the following is responsible for the variation in the colour of soil in different parts of India?a)Difference in rock formationsb)Weatheringc)Erosion and depositiond)Land useCorrect answer is option 'A'. Can you explain this answer?
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