9+Major+Landforms+of+the+earth

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The surface of the land is not the same everywhere. It is very uneven at some places while it is flat and level at others. there are uplands and there are lowlands. The various land forms on the earth's surface are a result of two types of forces- internal and external. The such as volcanic **internal forces** act from within the earth towards the surface such as volcanic eruptions and earthquakes. They act suddenly and cause upliftment or subsidence of the earth's crust, leading to the formation of mountains and plateaus. The **external forces** act on the surface of the earth such as running water, moving ice, wind and waves. They act slowly and wear down the highlighlands, depositing materials in the lowlands. The wearing down of the earth's surface is called **degradation.** The deposition of the worn down materials in low- lying areas results in an increase in the elevation of these areas. This is called m on the earth's surface. **aggradation.** Both the processes, degradation and aggradation work simultaneously, bringing about equilibrium on the earth's surface.

The landforms on the earth's surface are grouped under three major divisions, mountains, plateus and plains.



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