Short Answer

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Chapter 17

Short Answer

Short Answer
Answer each question with a few sentences.

This activity contains 11 questions.

What is permafrost? Where does it form and under what conditions?

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What problems and hazards does permafrost present for human activity such as construction? How did engineers avoid these in constructing the Alaskan pipeline? How is current global warming affecting permafrost, and what challenges does this represent?

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What does the term "frost action" mean? Provide examples.

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Look at this Space Shuttle image of the southern coast of Greenland. Note the dark lines intruding into the surrounding snow-covered landscape. Identify these features and describe how they are formed.

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Now, write a brief caption for the image as it might appear in your textbook to illustrate glacial processes and terms. Be sure to include a brief discussion of the accumulation and ablation zones.

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What glacial landforms would you expect to find in Greenland if its ice were to melt?

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How have ice cores from Greenland provided information on past climates?

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There is significant evidence that the current trend in global warming is impacting ice shelves and continental and apline glaciers around the world. Review some of this evidence.

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This animation shows the retreat of glacial ice from North America between 18,000 and 8,000 years ago. Note the areas of open water adjacent to the retreating glacier, shown as light blue on the map.

What do we call the remnants of these features today, and what might they have been like if you could travel back in time to visit them?

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What evidence of these Ice Age lakes might scientists find in modern landscapes that would be useful for reconstructing their distributions and histories?

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Does the animation provide any insight into the formation of the modern Great Lakes? When did they form?

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