Question 1

The Colorado River is an example of a large wash.

Accepted Answer

A) True 
 B)False

Question 2

Windblown loess,like sand,typically accumulates as mound-like dunes.

Accepted Answer

A) True 
 B)False

Question 3

Which letter,S thru Z,corresponds to the object in the photo labeled "D"?

Accepted Answer

The answer of Which letter,S thru Z,corresponds to the object...

Question 4

A(n) ________ represents a former meltwater channel or tunnel in glacial ice that was filled with sand and gravel.

Accepted Answer

A)  esker
B)  yazoo ridge
C)  valley plain
D)  kettleE) A) and C)
F) None of the above

Question 5

Would most features of alpine glaciation be preserved in the geologic record? Why or why not? What about continental glaciation?

Accepted Answer

Alpine glaciation would not be preserved because weathering attacks the highest point on the landscape,therefore the tops of mountains are constantly eroded by myriad forces.These forces would remove evidence of past alpine glaciations.Continental glaciation would leave depositional features as the glaciers recede,therefore there would be evidence of this type of glaciation.

Question 6

horn arête lateral moraine drumlin

Accepted Answer

drumlin

Question 7

In recent years there has been more discussion of droughts in places like eastern Texas,which is not considered a desert,than in southern Arizona which clearly is a desert.Does this mean that arid environments are changing and it would be better to invest in farm land near Phoenix,Arizona,than near Austin,Texas,for long term financial security?

Accepted Answer

It probably is not a good idea to assume that southern Arizona will not be a desert in the future and that eastern Texas will become a desert.Eastern Texas is less prepared to deal with short term climate fluctuations than southern Arizona because the climate has been relatively stable for almost a century and during that time southern Arizona has been arid and has adapted to that environment.It is likely that eastern Texas will learn to adapt if the climate persists in becoming more arid there.

Question 8

Moraines are the only glacial deposits composed of till.

Accepted Answer

A) True 
 B)False

Question 9

Deposits of windblown silt are called ________.

Accepted Answer

The answer of Deposits of windblown silt are called ________....

Question 10

Glacial ice sheets are the largest glaciers and they currently cover ________.

Accepted Answer

A)  Antarctica,Greenland,Alaska,the Andes Mountains,the Arctic Sea,and the Alps
B)  The Arctic Sea,the Alps,Greenland,Antarctica,and Alaska
C)  Alaska,Antarctica,and Greenland
D)  Greenland and Antarctica
E)  only AntarcticaF) B) and D)
G) B) and C)

Question 11

Desert and steppe lands cover about what percentage of Earth's land area?

Accepted Answer

A)  10%
B)  66%
C)  30%
D)  3%E) A) and C)
F) B) and C)

Question 12

A playa is an intermittent lake on the floor of a desert valley.

Accepted Answer

A) True 
 B)False

Question 13

Glacial sediments or tills are characterized by ________.

Accepted Answer

A)  striations
B)  cirques,arêtes,and hanging valleys
C)  moraines and glacial flour
D)  wide variations in sizes of clasts
E)  very fine-grained,highly polished clastsF) C) and E)
G) A) and E)

Question 14

Which of the following is not a major factor controlling glacial erosion?

Accepted Answer

A)  ice thickness
B)  rate of glacial ice movement
C)  strength of the glacial ice near its base
D)  character of the surface beneath the glacierE) None of the above
F) A) and B)

Question 15

If you fall into a crevasse,what is the maximum depth you are likely to fall?

Accepted Answer

A)  10 meters
B)  25 meters
C)  50 meters
D)  100 metersE) None of the above
F) A) and B)

Question 16

What is the name for the very large pluvial lake that once existed in northwestern Utah?

Accepted Answer

The answer of What is the name for the very...

Question 17

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.

Accepted Answer

Wind itself is not an agent of erosion,i...

Question 18

Permanent streams in desert regions are rare,and when they do occur,________.

Accepted Answer

A)  they originate in a glacier region
B)  they have numerous tributaries to keep them supplied with water as they cross the desert
C)  they originate outside of the desert region and have few tributaries in the desert
D)  they get their water from wadis and arroyosE) A) and D)
F) A) and C)

Question 19

Milankovitch cycles are used to explain the cycles of cold and warm climates that characterized the Ice Ages based on ________.

Accepted Answer

A)  plate tectonics and sea level rise
B)  solar flares and variations in the moon's orbit over time
C)  evolution of plants and animals and human impact
D)  variations in the earth's orbit about the sun and precession of the earth's axisE) All of the above
F) B) and D)

Question 20

Explain why crevasses only penetrate partway through a glacier.What limits their depth?

Accepted Answer

Below about 50 meters depth,th...

Exam 6: Glaciers, deserts, and Wind

The Colorado River is an example of a large wash.

Correct Answer
verified

Windblown loess,like sand,typically accumulates as mound-like dunes.

Correct Answer
verified

Which letter,S thru Z,corresponds to the object in the photo labeled "D"?

Correct Answer
verified

A(n) ________ represents a former meltwater channel or tunnel in glacial ice that was filled with sand and gravel.

Correct Answer
verified

Would most features of alpine glaciation be preserved in the geologic record? Why or why not? What about continental glaciation?

horn arête lateral moraine drumlin

Correct Answer
verified
drumlin

Moraines are the only glacial deposits composed of till.

Correct Answer
verified

Deposits of windblown silt are called ________.

Correct Answer
verified

Glacial ice sheets are the largest glaciers and they currently cover ________.

Correct Answer
verified

Desert and steppe lands cover about what percentage of Earth's land area?

Correct Answer
verified

A playa is an intermittent lake on the floor of a desert valley.

Correct Answer
verified

Glacial sediments or tills are characterized by ________.

Correct Answer
verified

Which of the following is not a major factor controlling glacial erosion?

Correct Answer
verified

If you fall into a crevasse,what is the maximum depth you are likely to fall?

Correct Answer
verified

What is the name for the very large pluvial lake that once existed in northwestern Utah?

Correct Answer
verified

Correct Answer
verified
Wind itself is not an agent of erosion,i...
View Answer

Permanent streams in desert regions are rare,and when they do occur,________.

Correct Answer
verified

Milankovitch cycles are used to explain the cycles of cold and warm climates that characterized the Ice Ages based on ________.

Correct Answer
verified

Explain why crevasses only penetrate partway through a glacier.What limits their depth?

Correct Answer
verified
Below about 50 meters depth,th...
View Answer

Exam 6: Glaciers, deserts, and Wind

The Colorado River is an example of a large wash.

Correct AnswerverifiedShow Answer

Windblown loess,like sand,typically accumulates as mound-like dunes.

Correct AnswerverifiedShow Answer

Which letter,S thru Z,corresponds to the object in the photo labeled "D"?

Correct AnswerverifiedShow Answer

A(n) ________ represents a former meltwater channel or tunnel in glacial ice that was filled with sand and gravel.

Correct AnswerverifiedShow Answer

Would most features of alpine glaciation be preserved in the geologic record? Why or why not? What about continental glaciation?

horn arête lateral moraine drumlin

Correct Answerverifieddrumlin

Moraines are the only glacial deposits composed of till.

Correct AnswerverifiedShow Answer

Deposits of windblown silt are called ________.

Correct AnswerverifiedShow Answer

Glacial ice sheets are the largest glaciers and they currently cover ________.

Correct AnswerverifiedShow Answer

Desert and steppe lands cover about what percentage of Earth's land area?

Correct AnswerverifiedShow Answer

A playa is an intermittent lake on the floor of a desert valley.

Correct AnswerverifiedShow Answer

Glacial sediments or tills are characterized by ________.

Correct AnswerverifiedShow Answer

Which of the following is not a major factor controlling glacial erosion?

Correct AnswerverifiedShow Answer

If you fall into a crevasse,what is the maximum depth you are likely to fall?

Correct AnswerverifiedShow Answer

What is the name for the very large pluvial lake that once existed in northwestern Utah?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedWind itself is not an agent of erosion,i...View AnswerShow Answer

Permanent streams in desert regions are rare,and when they do occur,________.

Correct AnswerverifiedShow Answer

Milankovitch cycles are used to explain the cycles of cold and warm climates that characterized the Ice Ages based on ________.

Correct AnswerverifiedShow Answer

Explain why crevasses only penetrate partway through a glacier.What limits their depth?

Correct AnswerverifiedBelow about 50 meters depth,th...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
drumlin

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Wind itself is not an agent of erosion,i...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Below about 50 meters depth,th...
View Answer