Exam 13: Climatic Extremes: Deserts and Glaciers

The angle of repose is the steepest angle at which loose particles will come to rest.

Bajadas are steep-sided canyons that result from erosion by the rapid run-off from intense rainfall.

A glacier that advances rapidly,as in the photograph,is said to _____.

How do glaciers advance?

At the head of an advancing valley glacier,more ice is rapidly lost to evaporation and melting than is replaced by snow.

What caused the 1930s "Dust Bowl" in western United States?

The glacial valley shown here was formed by ______.

Two great deserts in Africa are the _____ and Kalaharian (or Namibian).

A pile or ridge of rock debris carried or deposited directly by glacial ice is a(n)_____.

Why are the world's deserts located in bands centered on 30⁰N and 30⁰S latitude?

Long-term deflation as shown may lead to the development of desert _____.

Which of the following is NOT a glacial deposit?

Why do desert sand dunes take on several specific shapes?

Stresses in the brittle surface layer of glacial ice cause cracks as seen in the photograph,which become _____.

Why is some land in Antarctica depressed below sea level?

Describe the process which results in the crystal axes illustrated,whereby snow is transformed into glacial ice.

Saltation is a type of sediment transport in which particles move forward in a series of short jumps along arc-shaped paths.

_____is a type of sediment transport in which the wind causes particles to roll along the ground.

Glacial ice is generally formed by _____.

A glacier that fills a bowl-shaped depression on a mountain is a(n)_____ glacier.