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Question

What is gradation? What are the two types of forces that bring about gradation?

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Solution

The breaking down, transportation and deposition of rock minerals leading to the levelling of the Earth's surface is known as gradation.

The two forces that bring about gradation are as follows:
  1. Internal forces: These are the forces that act from within the Earth's surface. For example, volcanos and earthquakes
  2. External forces: Such forces act over the Earth's surface. For example, winds and waves

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