How do internal and external processes affect the relief?

The relief shape is formed under the influence of external and internal forces. Internal forces push out huge masses of rock, both solid and molten. Thanks to them, mountains and hills, rocks and faults are formed. And external forces such as temperature changes, water currents and precipitation, wind and ice masses wear out and erode the rock. Thanks to these forces, solid deposits are crushed, canyons are formed, and high mountains turn into small hills (like the Appalachians, the Urals, etc.).

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