Exam 13: Climatic Extremes: Deserts and Glaciers

The rocks at the base of an advancing glacier leave parallel scratches termed glacial _____.

Walden Pond is an example of a kettle pond.

An abraded and wind-shaped sediment or rock is a(n)_____.

The stable shape of a pile of sand or other sediment is determined by its angle of _____.

A thick sheet of floating ice at sea,adjoining a land glacier,is an ice _____.

Glacial striations and glacial grooves are evidence of glacial erosion.

In order to be classifies as a desert,a region must receive less than _____ millimeters of precipitation in a given year.

_____ is defined as a treeless,periglacial terrain,often featuring permafrost and patterned ground.

The mechanism of wind erosion in which loose particles of sand and dust are picked up and removed,leaving behind only coarser particles,is called _____.

A glacial valley,as marked by the * in the illustration below,partly filled by an arm of the sea,is a(n)_____.

All deserts are in hot,tropical areas.

The steepest portion of a desert sand dune is on the _____ side.

The Dust Bowl caused the largest short-term migration in the history of the United States.

Suspension is a type of sediment transport in which the wind carries very fine particles over long distances and periods of time.

Invasion of desert conditions into non-desert areas is termed _____.

When arroyos empty their sediments onto a flat desert floor,the resulting deposit forms a(n)_____.

Permafrost is a heterogeneous mixture of crushed rock,sand,pebbles,cobbles,and boulders deposited by a glacier.

An American experience with desertification in the earlier part of the 20ᵗʰ Century,as shown in this picture,is called The_____.

Continental ice sheets gouged out _____,a major feature in the central North American lowlands.

When sedimentary particles move in series of short bounces,the process is termed _____.