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Major landforms of the Earth - 2 Video Lecture | Social Studies (SST) Class 7 (Old NCERT)
FAQs on Major landforms of the Earth - 2 Video Lecture - Social Studies (SST) Class 7 (Old NCERT)
| 1. What are the major landforms on Earth? |  |
Ans. The major landforms on Earth include mountains, plateaus, plains, valleys, and deserts. These landforms are the result of various geological processes such as tectonic activity, erosion, and deposition.
| 2. How are mountains formed? | |
Ans. Mountains are formed through tectonic activity, specifically through the collision or convergence of tectonic plates. When two plates collide, one plate is usually forced beneath the other, resulting in the formation of mountains. This process is known as mountain-building or orogeny.
| 3. What are plateaus and how are they formed? | |
Ans. Plateaus are flat elevated areas of land that are characterized by steep slopes on one or more sides. They are often formed through geological processes such as volcanic activity, tectonic uplift, or erosion. Plateaus can also be the remnants of ancient mountains that have been eroded over time.
| 4. How are valleys formed? | |
Ans. Valleys are typically formed by the erosive action of rivers or glaciers. Rivers gradually erode the surrounding land over a long period of time, creating a V-shaped valley. Glaciers, on the other hand, carve out U-shaped valleys as they move and erode the land beneath them.
| 5. What are the characteristics of deserts? | |
Ans. Deserts are characterized by extremely dry conditions, receiving very little rainfall. They often have sparse vegetation and are dominated by sand or rocky surfaces. Deserts can be hot or cold, and they are typically found in areas with low precipitation and high evaporation rates.
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