Page 78 - Journeys Through Society-7

3. Earth’s Movements

and Major Landforms

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Crater Mouth Lava

Crust Magma chamber Channels with magma

The Earth’s crust, as we already know, is lighter and Exogenic forces: These forces act on the Earth's
floats on the molten mantle. The intense energy surface, such as wind, water, ice, temperature
produced due to the heat causes movements in the conditions, etc., and modify the face of the Earth.
Earth’s crust. This causes periodic changes in the Endogenic forces: These forces act beneath the
Earth’s surface. Earth's surface. They may either be slow and gradual,
like the forces involved in the process of mountain-
Forces changing the earth’s surface
building or continent-building, or quick and sudden,
The two main forces affecting the Earth's surface are like earthquakes and volcanoes.
exogenic forces and endogenic forces.

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