The movement of the plates under the surface of the earth are caused due to different forces. Based on the kind of force, these are categorized into exogenic and endogenic forces.

1) The forces that act in the interiors of the earth are called the endogenic forces. The sudden endogenic forces result in the natural disasters such as volcano, earthquake and landslides. They also cause the formation mountains.

2) The forces that act on the exterior or surface of the earth are called exogenic forces. These forces cause erosional and depositional in nature. They result in the in the formation of rivers, occurrence of rivers and glaciers.