Question 1

By increasing the albedo of the Earth,global ice sheets produce conditions that are ________ to their further advance,thus providing an example of ________ feedback.

Accepted Answer

A)   detrimental; positive
B)   detrimental; negative
C)   favorable; positive
D)   favorable; negative

Question 2

What are the circumstances that lead to glacial advance versus glacial retreat? Most glaciers today are in retreat.What does this imply about the glaciers and their environment?

Accepted Answer

In order for a glacier to advance there ...

Question 3

Wind blows finer particles long distances from glacial environments,where they settle out to form ________.

Accepted Answer

A)   firn
B)   loess
C)   outwash
D)   till

Question 4

A bowl-shaped depression formed by a mountain glacier is termed a(n) ________.

Accepted Answer

A)   arête
B)   cirque
C)   horn
D)   tarn

Question 5

An angular peak surrounded by three or more bowl-shaped depressions formed by a mountain glacier is termed a(n) ________.

Accepted Answer

A)   arête
B)   cirque
C)   horn
D)   tarn

Question 6

During the Pleistocene Ice Age,all the climate belts of the northern hemisphere shifted to the __________.

Accepted Answer

A)   north
B)   south
C)   east
D)   west

Question 7

If glaciers carry a mixture of different clast sizes,why are glacial outwash deposits layered?

Accepted Answer

A)   because clasts fall out of the glacier in size progression
B)   because gravity pulls out only the smallest particles
C)   because glacial outwash is formed from the bottom of the glacier
D)   because the glacier does not deposit the sediments; the river does

Question 8

The formation of continental glaciers ____________ the weight of the lithosphere causing it to __________.

Accepted Answer

A)   increases; subside
B)   increases; uplift
C)   decreases; subside
D)   decreases; uplift

Question 9

Glacial ice cores can be used to determine the atmospheric concentration of CO2 during the Earth's history.How do scientists come up with these data?

Accepted Answer

A)   They use the thickness of the ice layers to determine how much CO2 was in the atmosphere.
B)   They melt the ice and measure how much carbon was trapped in the ice.
C)   They record changes in the shape of ice crystals to determine the paleoclimate.
D)   They break the ice apart,release the air trapped in bubbles,and then measure the gases.

Question 10

Ice is a substance with a high albedo,which means it ________.

Accepted Answer

A)   requires much heat to raise its temperature by 1°C
B)   absorbs most of the light that falls on it
C)   reflects most of the light that falls on it
D)   strongly refracts the light that falls on it

Question 11

Cirques,horns,and arêtes form due to glacial ________,whereas moraines,erratics,and till form from glacial ________.

Accepted Answer

A)   erosion; deposition
B)   deposition; carving
C)   retreat; advance
D)   erosion; sublimation

Question 12

Which types of features would you find in a glacially eroded landscape?

Accepted Answer

A)   eskers,drumlins,cirques,and kettles
B)   cirques,arêtes,horns,and moraines
C)   cirques,arêtes,kettles,and tarns
D)   drumlins,ground moraines,and arêtes

Question 13

Which of the following statements is true of flowing water and glacial ice?

Accepted Answer

A)   Both flowing water and glacial ice are capable of sorting sediments based on clast size.
B)   Flowing water will sort sediment based on clast size; glacial ice will not.
C)   Glacial ice will sort sediment based on clast size; flowing water will not.
D)   Neither flowing water nor glacial ice will sort sediment based on clast size.

Question 14

Describe what you would expect to see in glacial till deposit.Why?

Accepted Answer

A glacial till deposit would c...

Question 15

What happens to global sea level during times of increased glaciation? During interglacial periods? Why?

Accepted Answer

Sea level falls during times of increase...

Question 16

Today,continental glaciers are limited to Antarctica and ________.

Accepted Answer

A)   Alaska
B)   Greenland
C)   Canada
D)   Siberia

Question 17

A hanging valley is formed when a ________.

Accepted Answer

A)   smaller glacially carved valley intersects with a larger glacially carved valley
B)   smaller stream-cut valley intersects with a larger stream-cut valley
C)   smaller stream-cut valley intersects with a larger glacially carved valley
D)   stream-cut valley is on the upthrust side of a normal fault

Question 18

Glacial ice exhibits ________ behavior near the top but ________ behavior at a depth of more than 60 m.

Accepted Answer

A)   brittle; plastic
B)   plastic; brittle
C)   solid; elastic
D)   plastic; elastic

Question 19

The Milankovitch cycles describe the change in ________ because of changes in the ________ of the Earth relative to the Sun.

Accepted Answer

A)   greenhouse gases; tilt
B)   eccentricity; orientation
C)   albedo; precession
D)   solar insolation; orientation

Question 20

When the sea level rises,causing the ocean to fill a glacially carved valley,a ________ results.

Accepted Answer

A)   cirque
B)   tarn
C)   fjord
D)   estuary

Exam 22: Amazing Ice: Glaciers and Ice Ages

By increasing the albedo of the Earth,global ice sheets produce conditions that are ________ to their further advance,thus providing an example of ________ feedback.

Correct AnswerverifiedShow Answer

A hanging valley is formed when a ________.

Correct AnswerverifiedShow Answer

Which types of features would you find in a glacially eroded landscape?

Correct AnswerverifiedShow Answer

Cirques,horns,and arêtes form due to glacial ________,whereas moraines,erratics,and till form from glacial ________.

Correct AnswerverifiedShow Answer

Describe what you would expect to see in glacial till deposit.Why?

Correct AnswerverifiedA glacial till deposit would c...View AnswerShow Answer

Glacial ice exhibits ________ behavior near the top but ________ behavior at a depth of more than 60 m.

Correct AnswerverifiedShow Answer

What happens to global sea level during times of increased glaciation? During interglacial periods? Why?

Correct AnswerverifiedSea level falls during times of increase...View AnswerShow Answer

Which of the following statements is true of flowing water and glacial ice?

Correct AnswerverifiedShow Answer

Today,continental glaciers are limited to Antarctica and ________.

Correct AnswerverifiedShow Answer

Ice is a substance with a high albedo,which means it ________.

Correct AnswerverifiedShow Answer

During the Pleistocene Ice Age,all the climate belts of the northern hemisphere shifted to the __________.

Correct AnswerverifiedShow Answer

What are the circumstances that lead to glacial advance versus glacial retreat? Most glaciers today are in retreat.What does this imply about the glaciers and their environment?

Correct AnswerverifiedIn order for a glacier to advance there ...View AnswerShow Answer

A bowl-shaped depression formed by a mountain glacier is termed a(n) ________.

Correct AnswerverifiedShow Answer

Wind blows finer particles long distances from glacial environments,where they settle out to form ________.

Correct AnswerverifiedShow Answer

If glaciers carry a mixture of different clast sizes,why are glacial outwash deposits layered?

Correct AnswerverifiedShow Answer

The formation of continental glaciers ____________ the weight of the lithosphere causing it to __________.

Correct AnswerverifiedShow Answer

An angular peak surrounded by three or more bowl-shaped depressions formed by a mountain glacier is termed a(n) ________.

Correct AnswerverifiedShow Answer

The Milankovitch cycles describe the change in ________ because of changes in the ________ of the Earth relative to the Sun.

Correct AnswerverifiedShow Answer

Glacial ice cores can be used to determine the atmospheric concentration of CO2 during the Earth's history.How do scientists come up with these data?

Correct AnswerverifiedShow Answer

When the sea level rises,causing the ocean to fill a glacially carved valley,a ________ results.

Correct AnswerverifiedShow Answer

By increasing the albedo of the Earth,global ice sheets produce conditions that are to their further advance,thus providing an example of feedback.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Cirques,horns,and arêtes form due to glacial ,whereas moraines,erratics,and till form from glacial .

Correct Answer
verified

Correct Answer
verified
A glacial till deposit would c...
View Answer

Glacial ice exhibits behavior near the top but behavior at a depth of more than 60 m.

Correct Answer
verified

Correct Answer
verified
Sea level falls during times of increase...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
In order for a glacier to advance there ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The formation of continental glaciers __ the weight of the lithosphere causing it to .

Correct Answer
verified

Correct Answer
verified

The Milankovitch cycles describe the change in because of changes in the of the Earth relative to the Sun.

Correct Answer
verified

Glacial ice cores can be used to determine the atmospheric concentration of CO₂ during the Earth's history.How do scientists come up with these data?

Correct Answer
verified

Correct Answer
verified