Question 1

The process by which icebergs are formed is called

Accepted Answer

A)  breaking.
B)  splitting.
C)  cracking.
D)  calving.

Question 2

Which of the following statements about varves is true?

Accepted Answer

A)  Clay layers are deposited in summer and silt layers are deposited in winter.
B)  Silt layers are deposited in summer and clay layers are deposited in winter.
C)  Sand layers are deposited in summer and gravel layers are deposited in winter.
D)  Gravel layers are deposited in summer and sand layers are deposited in winter.

Question 3

Which of the following terms describes an accumulation of rocky,sandy,or clayey material deposited at the end of a glacier?

Accepted Answer

A)  dune
B)  esker
C)  loess
D)  moraine

Question 4

If accumulation exceeds ablation,then

Accepted Answer

A)  the glacial ice will flow downhill and the glacial front will move downhill.
B)  the glacial ice will flow downhill,but the glacial front will move uphill.
C)  the glacial ice will flow uphill,but the glacial front will move downhill.
D)  the glacial ice will flow uphill and the glacial front will move uphill.

Question 5

When a glacier moves as a block of ice,the movement is called

Accepted Answer

A)  ice flow.
B)  plastic flow.
C)  a surge.
D)  basal slip.

Question 6

If a very large iceberg in the ocean were to melt,what would happen to sea level?

Accepted Answer

A)  The sea level would decrease slightly.
B)  The sea level would remain the same.
C)  The sea level would increase slightly.
D)  The sea level would decrease or increase depending on the air content of the iceberg.

Question 7

Why do glacial crevasses form?

Accepted Answer

A)  because glacial meltwater erodes small valleys as glacial rivers flow
B)  because plate tectonic forces deform the glacier
C)  because the glacial surface is brittle and cracks as the ice flows
D)  because the glacial surface partially melts,leaving holes and cracks

Question 8

Which of the following is a depositional feature rather than an erosional feature?

Accepted Answer

A)  an arête
B)  a cirque
C)  an esker
D)  a hanging valley

Question 9

How much of Earth's land surface is permanently frozen?

Accepted Answer

A)  approximately 1%
B)  approximately 5%
C)  approximately 10%
D)  approximately 25%

Question 10

Which of the following erosional features is characteristic of rivers and not glaciers?

Accepted Answer

A)  an arête
B)  a cirque
C)  a roche moutonée
D)  a V-shaped valley

Question 11

A large glacier has three medial moraines on top of it.How many valley glaciers must have a fed it?

Accepted Answer

A)  one
B)  two
C)  three
D)  four

Question 12

_______ are glacial landforms that are called "sheep backs" in some countries and "whale backs" in other countries,such as Iceland.

Accepted Answer

A)  Eskers
B)  Roche moutonées
C)  Drumlins
D)  Kames

Question 13

In order to be called a glacier a mass of ice must

Accepted Answer

A)  reach a certain thickness.
B)  have lost most of its trapped air.
C)  reach a certain areal extent.
D)  move downhill.

Question 14

The main force that drives glacial flow is

Accepted Answer

A)  gravity.
B)  tides.
C)  wind.
D)  the Moon.

Question 15

Which of the following glacial deposits is the best sorted?

Accepted Answer

A)  an esker
B)  a kame
C)  a moraine
D)  a varve

Question 16

When a glacier moves like a stack of cards that has been shifted,the movement is called

Accepted Answer

A)  ice flow.
B)  plastic flow.
C)  a surge.
D)  basal slip.

Question 17

What triggered the Pleistocene ice ages?

Accepted Answer

A)  an increase in greenhouse gases
B)  Milankovitch cycles
C)  a shift in Earth's axis of rotation
D)  Geoscientists are still uncertain.

Question 18

Which of the following agents of erosion deposits the most poorly sorted sediment?

Accepted Answer

A)  ice
B)  ocean currents
C)  streams
D)  wind

Question 19

In a valley glacier located in a cold region the flow rate will

Accepted Answer

A)  increase with depth.
B)  increase from center to the sides.
C)  be constant throughout the glacier.
D)  decrease with depth.

Question 20

Where is the largest mass of ice on Earth located?

Accepted Answer

A)  Antarctica
B)  Greenland
C)  the Himalayas
D)  Siberia

Exam 21: Glaciers: the Work of Ice

The main force that drives glacial flow is

Correct AnswerverifiedShow Answer

_______ are glacial landforms that are called "sheep backs" in some countries and "whale backs" in other countries,such as Iceland.

Correct AnswerverifiedShow Answer

When a glacier moves as a block of ice,the movement is called

Correct AnswerverifiedShow Answer

Which of the following statements about varves is true?

Correct AnswerverifiedShow Answer

A large glacier has three medial moraines on top of it.How many valley glaciers must have a fed it?

Correct AnswerverifiedShow Answer

Why do glacial crevasses form?

Correct AnswerverifiedShow Answer

Which of the following is a depositional feature rather than an erosional feature?

Correct AnswerverifiedShow Answer

How much of Earth's land surface is permanently frozen?

Correct AnswerverifiedShow Answer

In order to be called a glacier a mass of ice must

Correct AnswerverifiedShow Answer

Which of the following agents of erosion deposits the most poorly sorted sediment?

Correct AnswerverifiedShow Answer

Which of the following terms describes an accumulation of rocky,sandy,or clayey material deposited at the end of a glacier?

Correct AnswerverifiedShow Answer

If accumulation exceeds ablation,then

Correct AnswerverifiedShow Answer

What triggered the Pleistocene ice ages?

Correct AnswerverifiedShow Answer

The process by which icebergs are formed is called

Correct AnswerverifiedShow Answer

If a very large iceberg in the ocean were to melt,what would happen to sea level?

Correct AnswerverifiedShow Answer

In a valley glacier located in a cold region the flow rate will

Correct AnswerverifiedShow Answer

Where is the largest mass of ice on Earth located?

Correct AnswerverifiedShow Answer

Which of the following glacial deposits is the best sorted?

Correct AnswerverifiedShow Answer

When a glacier moves like a stack of cards that has been shifted,the movement is called

Correct AnswerverifiedShow Answer

Which of the following erosional features is characteristic of rivers and not glaciers?

Correct AnswerverifiedShow Answer

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