Question

Describe physical weathering and the role of Sun in their process.

Answer 1

Weathering-

1. Breakdown of rocks into smaller fragments and eventually into soil over a course of millions of years is called weathering.

Physical weathering-

1. It is caused by the change in temperature.
2. Gravitational forces such as overburden, pressure, load, and shearing stress bring about physical weathering.
3. Expansion forces due to temperature changes, crystal growth, or animal activity are also major factors.

Role of Sun

1. Sun is primarily responsible for the changes in temperature during physical weathering.