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Exam 4: Glacial and Arid Landscapes

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Question 1

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Which of the following is NOT a variety of moraine?

A) lateral
B) medial
C) end
D) hanging

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Question 2

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Examine the satellite image of Death Valley, California. (a)What province of the United States is it located within? (b)Identify the various desert landforms seen there, circle and label them, and (c)describe how each one forms. Finally, (d)describe the sequence of events to that produced this scene over time.

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This satellite image shows a section of...

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Question 3

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Bajadas develop when multiple alluvial fans grow and merge along the fronts of mountain ranges in arid lands.

Deflation may lead to ________.

________ is drier than steppe.

A(n)________ a thick, flowing ice mass that forms over hundreds or thousands of years.

________ are erosional features produced by valley (alpine) glaciers.

Match the landscape feature with the material from which it is formed. A)till B)outwash C)solid rock -13)glacial erratic 14)cirque 15)esker 16)horn 17)drumlin 18)moraine

Moraines are the only glacial deposits composed of till.

A landscape dominated by U-shaped valleys and pyramid-shaped mountains is most likely formed due to ________.

The ________ region of the United States is depicted in this image.

Under typical conditions, glaciers flow ________.

About what percentage of Earth's land surface is covered by deserts?

By the year 2030, it is possible that Glacier National Park in Montana will not have any ________.

Wind is included along with gravity, water, and ice as an agent of erosion. In many national parks and other areas of natural beauty, statements are often made that credit wind as having sculpted the landscape. Briefly discuss the importance of wind as an agent of erosion and explain why such statements are probably geologically inaccurate.

A(n)________ is a cone of debris that forms where an ephemeral stream emerges from the confines of the canyon. Its runoff spreads over the gentler slopes at the base of the mountains and quickly loses velocity, dumping most of its sediment load within a short distance.

Glaciers are powerful agents of erosion and deposition, and during the Quaternary Ice Age, these flowing masses of ice reshaped much of the North American continent. Discuss three of the effects of Ice Age glaciers that are NOT related to erosion or deposition.

Desert regions that exhibit a discontinuous pattern of ephemeral streams that do not flow out of the desert to the ocean are said to have a(n)________.

Melting and calving are two forms of accumulation.

If accumulation exceeds ablation in a glacial budget, which of the following will happen?