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प्रश्न
Can animals and plants also influence weathering? Will that be physical or chemical weathering? Which type of weathering does stone quarrying cause?
उत्तर
- Yes, burrowing animals widen the fissures in the rocks. Rocks become weak and disintegrate.
- The roots of the trees and other plants penetrate in the soil, they grow in size, exert pressure on rocks, widen cracks in the rocks and rocks break. Many microscopic organisms such as algae, lichens, bacteria, moss, etc produce chemicals and they break down the outer layer of the rock. These chemicals are responsible for the physical and chemical weathering of rocks.
- The stone quarrying causes the anthropogenic weathering.
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संबंधित प्रश्न
Identify the correct correlation:
A: Assertion; R: Reasoning
A: In areas of high rainfall, slides are very common.
R: Types of mass wasting movements are dependent on a region's climate.
Identify the correct correlation:
A: Assertion; R: Reasoning
A: Gravity is a major factor in mass wasting.
R: Gravity pulls all things down to the earth's surface.
Identify the correct correlation:
A: Assertion; R: Reasoning
A: Freeze and thaw weathering is common in desert areas.
R: Water gets into cracks and breaks the rocks.
Identify the correct group:
Draw a neat and labelled diagram of Freeze and thaw weathering
Draw a neat and labelled diagram of Block disintegration.
Draw a neat and labelled diagram of Biological weathering.
In which regions will freeze-thaw weathering not be effective?
See the diagram and answer the following questions:
- Which rock layer has experienced the most weathering?
- Which rock layer has experienced the least weathering?
- What could be the reason behind the difference in weathering?
Study the following schematic diagram. It shows the relationship between the speed of material and moisture content. Read the index, and answer the following questions:
- Fast
- Slow
- Dry
- Wet
- Creep
- Slide
- Fall
- Flow
Question:
- What will happen when the weather conditions are dry?
- When will a flow occur?
- When will a creep occur?
- Now can you enumerate the factors which affect mass wasting?