Glaciers

In a process called plucking, the rocks dragged by glaciers produce grooves and scratches in bedrock.

a ridge-like deposit of sediment at the edge of a glacier

process of erosion in which a glacier drags rocks along the landscape

as a glacier flows over the land, it picks up rocks in this process

What is one main difference between continental glaciers and valley glaciers? a. Continental glaciers are much larger and thicker. b. Each type of glacier is made of different materials. c. Valley glaciers cause more erosion. d. Continental glaciers never melt.

A valley glacier spreads out over a large island or continent.

depressions left by melted blocks of ice in glacial deposits

Once the depth of snow and ice reaches more than 30 to 40 meters, the force of friction begins to pull a glacier downhill.

Glaciers can only form when a. there is an ice age. b. there is a U-shaped valley in the mountains. c. the amount of snow exceeds the amount of rain. d. more snow falls than melts.

The process in which rock fragments freeze to the bottom of a glacier and then are carried away when the glacier moves is called a. plucking. b. surging. c. valley widening. d. abrasion.