Glaciers

Front

The photograph shows both erosional and depositional features formed by an agent of erosion. Which agent of erosion produced the features shown in the photograph? Options: running water, glacial ice, ocean waves, prevailing wind

Back

glacial ice

Front

The photograph shows scratched and grooved bedrock with boulders on its surface. The scratches and grooves were most likely created when:

• alternating thawing and freezing of water cracked the bedrock
• flooding from a nearby lake covered the bedrock
• a glacier dragged rocks over the bedrock
• rocks from a landslide slid along the bedrock

Back

a glacier dragged rocks over the bedrock

Front

The photograph shows a valley. Which agent of erosion most likely produced this valley's shape? Options: blowing wind, ocean waves, moving ice, running water

Back

moving ice

Front

The cross sections show a three-stage sequence in the development of a glacial feature. Which glacial feature has formed by the end of stage 3?

Back

kettle lake

Front

How were the striations on the surface bedrock made?

Back

Rocks at the bottom of the glaciers were dragged over the bedrock.

Front

Which landscape feature was most likely formed by glacial activity? Options: an eroded plateau, a flat floodplain, a U-shaped valley, a V-shaped valley

Back

a U-shaped valley

Front

The bedrock at a certain location is deeply scratched, and in some places is covered by a layer of unsorted sediment. Which erosional agent was probably responsible for these features?

Back

glaciers

Front

What will be the most likely result if a mountain glacier in the northern United States gains more snow mass than it loses over a period of years?

Back

The glacier will increase in size, and the ice front will advance.

Front

The elongated hills labeled R in the diagram of a receding continental glacier are most useful in determining the:

Back

direction the glacier has moved