Exam 13: Glaciers and Ice Ages

The higher-altitude portion of a glacier where snow accumulates from year to year and forms glacial ice is called the ____.

Explain how computer modeling has estimated Glacier National Park's glaciers in the future.

A thick mass of ice that floats on the ocean surface but is connected to and fed from a glacier on land is called a(n) ____.

A moraine at the end of a glacier that is neither advancing nor retreating is called a lateral moraine.

Ice is so much more viscous than water that it sorts particles into various sizes.

Glacial ice forms in the zone of ablation.

Precession relates to the shape of Earth's orbit around the Sun.

A(n) ____ is a section of a glacier consisting of numerous crevasses and towering ice pinnacles.

Kames are composed of stratified drift.

Deep, narrow valleys that were carved by glaciers and were later flooded by rising seas as the glaciers melted are called ____.

Describe the sights and sounds inside of a crevasse.

Compare and contrast basal slip and plastic flow.

The Matterhorn, in the Swiss Alps, is an example of a(n) ____.

Glaciers form U-shaped valleys.

Compare and contrast the Greenland and Antarctic ice sheets.

List the location of Earth's two ice sheets and describe how much fresh water is in them.

The Pleistocene Glaciation began about ____ years ago.

Describe the texture of till and Pleistocene tills.

A(n) ____________________ is a fracture or crack in a glacier that forms when the glacier flows over uneven bedrock.

The relative rates of basal slip and plastic flow depend on the ____ of the bedrock underlying the glacier, the ____ of the ice, and the temperature of the glacier.