Question

In three to five sentences, explain how the valleys and mountain ranges form.

Answer 1

Mountains typically form where tectonic plates collide or where magma rises, causing the crust to fold, fault, and be pushed upward (or pile up as volcanic mountains). Long-term uplift from these forces builds ranges like the Himalayas. Valleys form where rock is eroded away by rivers or glaciers over long time, or where crustal blocks drop down between faults (rift or graben valleys). Ongoing erosion and tectonic activity continually deepen and reshape valleys while uplifting or modifying mountains.