Practice Science Test Chapter 4 Section 4

Mass wasting is the downhill movement of a large mass of rocks or soil because of the pull of gravity.Two important parts about mass wasting is

. A large amount of material moves together as a mass

. Gravity is the main cause of the movement

Glaciers are large mass of ice that formed on land and moves slowly across Earth's surface. Glaciers forms on land in areas where the amount of snowfall is greater than the amount of snowmelt.

A landslide is the rapid downhill movement of soil loose rocks and boulders.

A landslide can be either a rockfall or a mudslide. A rockfall is an event in which rocks are pulled to the bottom of a slope by gravity. A mudslide can be caused by heavy rains loosening the sediment on a slope causing mud to flow downhill.

Slump is a type of mass wasting that takes place when material moves slowly in a large mass

Creep may cause trees and other object to lean over.

The amount of erosion that occurs during mass wasting depends on the following factors:

. the type of rocks involved

. the amount of water in the soil

. how steep the slope is

Two main type of glaciers are alpine glacier and ice sheet. Alpine glaciers forms on mountains and flows downhill Some features created by alpine are

: Horns are sharp peaks

: U-shaped valleys carves away the land leaving behind distinctive

: Arete are sharp ridge of rocks formed between glaciers

: Cirque are semicircular hollows that formed by glacial erosion

: Hanging valley forms when a smaller glacier at a higher elevation apporach a large valley carved by a much bigger glcier.

Till a mixture of various sizes of sediment deposited by a glacier

Moraine a mound or ridge of unsorted sediment deposited by a glacier

Outwashed layered sediment deposited by streams of water that flows from a melting glacier.