Earth and Space Science 4

Greenland's ice sheet covers about ________ of the island.

80%

Why is it difficult to reconstruct the glacial episodes of the Pleistocene Ice Age from the glacial record on land?

The glacial record on land is punctuated by many erosional gaps.

What observations would contradict the hypothesis that desert pavement forms through deflation? Choose all that apply. There are few or no pebbles found in the sediment beneath the desert pavement. The desert pavement is poorly sorted. Wind cannot transport silt. The silt is primarily eroded by ephemeral streams. Windblown silt can accumulate and infiltrate through the pebbles.

There are few or no pebbles found in the sediment beneath the desert pavement. Windblown silt can accumulate and infiltrate through the pebbles.

When alluvial fans enlarge and coalesce in the desert environment in the Basin and Range region, what feature do they form?

a bajada

Which of the following is a feature of a desert environment? an ephemeral stream an extensive tributary system a forest a crevasse a meandering stream system

an ephemeral stream

What is the largest type of glacier?

an ice sheet

How do glaciers move? Choose all that apply. by the calving of icebergs by the opening and closing of cracks along the bottom of glaciers by the plastic flow of ice as a turbulent flow like rivers by ice mass sliding along the ground

by the plastic flow of ice by ice mass sliding along the ground

Where is the focal point of a glacier's growth?

in a cirque

Which glacial feature indicates the maximum extent of a glacier?

terminal end moraine

Which of the following can wind transport across large areas? the bed load till the suspended load erratics glacial drift

the suspended load