Weathering and Its 3 Types



When I was young I used to go to my village with my family found more uneven areas as compared to today. Now I found more plains than that time.

Our Earth was not like today we saw it. This is a result of so many physical, chemical, and biological changes. Weathering plays a vital role in this process.

Definition of Weathering—
The process of breakdown of the earth’s surface or hard rocks into small pieces on its own place with the help of the sun, soil, snow, wind, and biological organisms is known as weathering.
The disintegration and decomposition process of rocks came into weathering.

Types of Weathering

The process of weathering can be divided into three types are as follows:

  1. Physical or Mechanical weathering
  2. Chemical weathering
  3. Biological weathering
We will discuss one by one, about each type, in detail.

Physical or Mechanical weathering

This type of weathering occurs due to the physical force on rocks.
The main agents/ factors of physical weathering are frost, insolation, and pressure release.
The freeze-thaw, block disintegration, granular disintegration, and exfoliation are some mechanical weathering process results on rocks.
There is no change in the chemical composition and properties of rocks.
It is more active in the dry and cold climatic regions of the world.

Chemical weathering

This occurs due to the chemical reaction with the rocks.
This kind of weathering is very active in wet and hot climatic regions of the world.
The main factors of chemical weathering are :

  • Oxidation
  • Carbonation
  • Hydration
  • Chemical weathering changed the chemical properties of rocks.

For example, Feldspar changes into kaolin or primary rocks into secondary rocks.

Biological weathering

This occurs due to plants, animals, and human beings' activities.
The roots of plants, the hole in rocks by insects, and small animals like rats, rabbits, earthworms, ants, termites, etc are helpful in the breakdown of rocks.
Some human activities like mining, digging, tunnels, construction work, etc. affect the rocks.

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