The features on the earth surface is gradually changed by the agents of external processes such as running water, glaciers, wind, ground water and sea waves. The external processes are as follows:

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Denudation
Denudation is an erosive process of breaking and removing of rocks from the surface of the earth and exposing the underlying rocks. It is the result of weathering, erosion and transportation.

External Process

Physical Weathering

The process of breaking down of rocks by physical processes like changing temperature on rock. More common in places where there are less plants and little soil such as in mountains and deserts.

​​Weathering

​Chemical weathering is the process of breaking down of rock due to chemical reactions

​​Chemical Weathering

Biological weathering involves the actions of plants and animals. Human activities like mining and constructions also lead to weathering

​Biological Weathering

The process of removal and transportation of weathered materials from one place to another is known as erosion. Running water, rain, wind and moving ice are some agents of erosion.

​Erosion

Desposition

​The materials eroded by different agents are transported and deposited in different areas. It is caused by running water, wind, glacier, sea wave and ground water. Deposition usually occurs in low lying areas and leads to the formation of different landforms.

what causes types of land formation

• Denudation

• Physical Weathering

• Chemical Weathering

• Erosion

• Biological Weathering

• Deposition

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