Numerous changes in Earth's structure have occurred , and still continue today. Continents collide and separate. Mountains are raised and eroded constantly. Oceans inundate land, and then recede. Forces are continually at work in the Earth's interior. These forces cause numerous activities on and near the surface effecting all Earth's inhabitants.
They can be classified accordingly:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|