Exam 9: Ice and Glaciers,wind and Deserts

Glaciers form only near the poles.

Glacial striations are

Moraine is a landform that is made up by the deposition of till.

Calving is a process which results in the formation of icebergs.

Desertification is

Horizontal flow of air is driven,in part,by air-temperature differences over land and water.

Because winds blow everywhere,while surface water is found in limited areas,worldwide wind erosion is comparable in scale and impact to erosion by water.

A relatively small and localized wind vortex commonly observed in more arid climates is

Because wind is such an inefficient agent of erosion,wind-deposited sediments are poorly sorted,like glacial sediments.

When ice is lost from a glacier by a set of processes then the process is called

Continental glaciers are smaller and much more common than alpine glaciers.

Because ice is so efficient an agent of erosion,alpine glaciers carve steep-sided,V-shaped valleys.

Milankovitch cycles are caused by

The ice age is also commonly referred to as the

The extent of ice sheets in North America during the last ice age can be determined,in part,by mapping terminal moraines.

Which of the following best describes the movement of a glacier?

In mid-western North America,the southern boundary of the north polar ice cap during past ice ages is marked by these two rivers

A landform made of sediment deposited by melting ice is

The resultant sediment that is transported and deposited by the glacial meltwater is called

Large,regional deserts,such as the Sahara of northern Africa,occur here relative to the equator