physical weathering is an example of physical change.explain
Answers
Answer:
The disintegration of rocks by mechanical way and without any chemical changes is called “Mechanical weathering”. It is also called “physical weathering”.
The process of Mechanical weathering is in various forms, depending the types of rock.
They are:
a. Block disintegration: Due to temperature variation, there is continuous expansion and contraction in the rocks causing tension and stress. Later these rocks disintegrate into blocks known as “Block Disintegration”.
b. Granular disintegration: Rocks consist of several types of minerals and these minerals react differently to heat. As a result, the rocks break into different mineral grain known as “Granular Disintegration”.
c. Exfoliation: Due to the heat of the Sun, outer surfaced of rocks gets heated up, but inside it remains almost cool. This makes the rockto expand and crack. The thin layer of rocks peels off, like the peeling of an onion. This process is called “Exfoliation”.
Answer:
Rocks often experience physical weathering as a result of exposure to swiftly moving water. Water flowing in a stream into a rock can eventually create a hole in the rock. When the rocks drop back down they bump into other rocks, and tiny pieces of the rocks can break apart