Exam 17: Glacial and Periglacial Processes and Landforms

The various processes that result in the loss of a glacier's mass are known collectively as

Glacial polish results from

The accumulation zone of a glacier ends at the ________, which marks the elevation above which the winter snow and ice remained intact throughout the summer.

Ice regelation incorporates rock debris into a glacier.

The snowline is at a higher elevation on equatorial mountains than on midlatitude mountains.

Periglacial environments are likely to occur in which of the following climate types?

Approximately 80% of Alaska has permafrost beneath its surface.

About half of Arctic sea-ice volume has disappeared since 1970 due to warming throughout the region.

The zone where accumulation balances ablation is known as the

A long, narrow glacially-eroded inlets in which the sea extends inland are known as

A glacier is an open system with inputs of snow and outputs of ice, meltwater, and water vapor.

The type of glacier that dominates Greenland and Antarctica is an

During the Pleistocene ice age, many areas of the southwestern United States were covered by large pluvial lakes.

The Arctic region is defined based on the July 10°C (50°F) isotherm whereas the Antarctic region is defined based on the February 10°C (50°F) isotherm.

Several valley glaciers coalescing at the base of a mountain range form a(n)

The presence of meltwater at the bottom of a glacier can increase its rate of movement.

There is no evidence of recent Antarctic ice sheet breakup.

Permafrost requires soil, sediment, or rock temperatures to remain below freezing for at least 2 years.

Alpine glaciers include all of the following except

Which of the following has been sited as a positive feedback loop involving the thawing of permafrost?