Question 1

A glacier behaves more like a plastic than a rigid body.

Accepted Answer

A) True 
 B)False

Question 2

Discuss several issues glacial and periglacial environments may face during the 21st Century.

Accepted Answer

Answers will vary.The main broad issue f...

Question 3

Much of western North America relies heavily on snowmelt for municipal water supplies.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following best describes the Pleistocene?

Accepted Answer

A)  Sea levels were 100 m higher than today.
B)  At its height almost three quarters of Earth was covered with ice.
C)  It began 1.65 mya and had at least 18 glacial/interglacial cycles.
D)  The southern terminus of continuous ice at its greatest extent was located in northern Florida.E) A) and D)
F) All of the above

Question 5

How does the time required for glaciation to occur compare to the time required for deglaciation to happen?

Accepted Answer

A)  Glaciation requires 1000 years; deglaciation requires 100 years.
B)  Glaciation requires 100 years; deglaciation requires 1000 years.
C)  Glaciation requires 100 000 years; deglaciation requires 10 000 years.
D)  Glaciation requires 10 000 years; deglaciation requires 90 000 years.E) A) and B)
F) A) and D)

Question 6

Which of the following is an adaptation to living in periglacial regions?

Accepted Answer

A)  Buildings placed directly on frozen,hard surfaces.
B)  Burying water and sewage lines.
C)  Raising oil pipelines above the frozen ground.
D)  Careful maintenance of rail tracks and roadbeds in the winter.E) C) and D)
F) A) and B)

Question 7

During the height of the Pleistocene ice age,the glaciers extended as far south as the Ohio and Missouri river systems.

Accepted Answer

A) True 
 B)False

Question 8

If a glacier does not have debris embedded in its base,it is not a very effective agent of abrasion.

Accepted Answer

A) True 
 B)False

Question 9

During the Pleistocene up to 11% of Earth was covered with ice.

Accepted Answer

A) True 
 B)False

Question 10

Which usually results in the formation of crevasses?

Accepted Answer

A)  Regelation and slippage.
B)  Ablation.
C)  Deposition and termination.
D)  Friction,tension,and compression.E) B) and D)
F) A) and D)

Question 11

During a surge,a glacier moves up to 2 km • h-1.

Accepted Answer

A) True 
 B)False

Question 12

Which is a steep-sided glaciofluvial depression that occurs as the result of blocks of ice calving from the retreating glacier,becoming buried by the subsequent accumulation of till around the ice block,and finally,the ice block melting?

Accepted Answer

A)  Drumlin.
B)  Kame.
C)  Esker.
D)  Kettle.E) A) and C)
F) A) and B)

Question 13

Which may be associated with glacial surges?

Accepted Answer

A)  Glaciers frozen at the bed.
B)  Bedrock below the glacier that allows ice to slip easily downslope.
C)  Friction at the bed due to surface roughness.
D)  Water pressure,soft bed beneath the glacier,or lubrication from meltwater.E) B) and D)
F) None of the above

Question 14

Which best describes permafrost?

Accepted Answer

A)  It develops where soil or rock temperatures are below freezing for at least two years.
B)  It primarily occurs in areas covered with glaciers.
C)  The surface layer of permafrost never thaws,even in the warm season.
D)  It tends to occur at lower elevations in the midlatitudes than in the high latitudes.E) C) and D)
F) All of the above

Question 15

Where is the bulk of ice on Earth?

Accepted Answer

A)  North America,specifically Alaska.
B)  European and Asian mountain ranges.
C)  Greenland and Antarctica.
D)  Floating ice shelves and packs.E) A) and B)
F) All of the above

Question 16

Which is glacial ice?

Accepted Answer

A)  It is essentially the same as snow.
B)  It is formed from continual accumulation of snow that recrystallizes under its own weight into an ice mass over a period of many years.
C)  It is made of sedimentary rock.
D)  It is generally less dense than snow and firn.E) B) and D)
F) None of the above

Question 17

What is the importance of the Pleistocene ice age epoch to the modern day?

Accepted Answer

Answers may vary because of the long-las...

Question 18

If two glaciers with lengthy ridges of till along each side of the glacier merge,which moraine may form?

Accepted Answer

A)  Ground.
B)  Terminal.
C)  Medial.
D)  Lateral.E) A) and C)
F) None of the above

Question 19

Which is the average thickness of the Greenland and Antarctic ice sheets?

Accepted Answer

A)  More than 1000 m.
B)  More than 2000 m.
C)  More than 3000 m.
D)  More than 4000 m.E) A) and B)
F) A) and C)

Question 20

About half of Arctic sea-ice volume has disappeared since 1970 due to warming throughout the region.

Accepted Answer

A) True 
 B)False

Exam 17: Glacial and Periglacial Landscapes

Much of western North America relies heavily on snowmelt for municipal water supplies.

Correct AnswerverifiedShow Answer

Which may be associated with glacial surges?

Correct AnswerverifiedShow Answer

Which best describes permafrost?

Correct AnswerverifiedShow Answer

If two glaciers with lengthy ridges of till along each side of the glacier merge,which moraine may form?

Correct AnswerverifiedShow Answer

Discuss several issues glacial and periglacial environments may face during the 21st Century.

Correct AnswerverifiedAnswers will vary.The main broad issue f...View AnswerShow Answer

Which is a steep-sided glaciofluvial depression that occurs as the result of blocks of ice calving from the retreating glacier,becoming buried by the subsequent accumulation of till around the ice block,and finally,the ice block melting?

Correct AnswerverifiedShow Answer

What is the importance of the Pleistocene ice age epoch to the modern day?

Correct AnswerverifiedAnswers may vary because of the long-las...View AnswerShow Answer

How does the time required for glaciation to occur compare to the time required for deglaciation to happen?

Correct AnswerverifiedShow Answer

Which of the following best describes the Pleistocene?

Correct AnswerverifiedShow Answer

During the Pleistocene up to 11% of Earth was covered with ice.

Correct AnswerverifiedShow Answer

During the height of the Pleistocene ice age,the glaciers extended as far south as the Ohio and Missouri river systems.

Correct AnswerverifiedShow Answer

Which of the following is an adaptation to living in periglacial regions?

Correct AnswerverifiedShow Answer

During a surge,a glacier moves up to 2 km • h-1.

Correct AnswerverifiedShow Answer

Which is the average thickness of the Greenland and Antarctic ice sheets?

Correct AnswerverifiedShow Answer

Where is the bulk of ice on Earth?

Correct AnswerverifiedShow Answer

About half of Arctic sea-ice volume has disappeared since 1970 due to warming throughout the region.

Correct AnswerverifiedShow Answer

If a glacier does not have debris embedded in its base,it is not a very effective agent of abrasion.

Correct AnswerverifiedShow Answer

Which usually results in the formation of crevasses?

Correct AnswerverifiedShow Answer

A glacier behaves more like a plastic than a rigid body.

Correct AnswerverifiedShow Answer

Which is glacial ice?

Correct AnswerverifiedShow Answer

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Answers will vary.The main broad issue f...
View Answer

Correct Answer
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Correct Answer
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Answers may vary because of the long-las...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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