Section 2: Forces of Change
A Geographic View
A Planet in Motion
Internal Forces of Change
Mountains are formed in different ways, some are formed when continental plates collide and some are formed when a sea plate collides with a continental plates. There is a process called subduction where the heavier sea plate dives beneath the continental sea plate. In another process, earth's crust come together slowly as the sea plate with is called accretion.
Sea plates pull apart which is the process called spreading. Some plates squeeze the earth's surface this causes folds or bends.