Question

How does a glacier change the surface of the earth?

Answer 1

They change/erode the Earth, not by pushing rocks, but by two mechanisms: plucking and abrasion. Plucking is when a glacier pulls pieces of rock from the land under the frozen ice. This occurs when glaciers melt at the bedrock and the water seeps into the cracks of the rock and feezes.

Answer 2

A glacier's weight, combined with its gradual movement, can drastically reshape the landscape over hundreds or even thousands of years. The ice erodes the land surface and carries the broken rocks and soil debris far from their original places, resulting in some interesting glacial landforms.