Question 1

Postfire debris flows are most common in the first 2 years after a fire.

Accepted Answer

A) True 
 B)False

Question 2

How did the underlying geology contribute to the Gros Ventre Landslide of 1925?

Accepted Answer

A)  Rains saturated the sandstone and clay that make up the slope.
B)  Creep weakened the sandstone making up the slope.
C)  Vegetation was removed from the slope.
D)  The river that flowed through the valley dissolved the limestone.E) B) and D)
F) A) and D)

Question 3

A ________ is an example of a translational slide.

Accepted Answer

A)  rockslide
B)  creep
C)  mudflow
D)  slumpE) None of the above
F) All of the above

Question 4

What is the controlling force of mass wasting?

Accepted Answer

A)  Water
B)  Gravity
C)  Friction
D)  HydrationE) None of the above
F) A) and D)

Question 5

What is the slowest form of mass wasting?

Accepted Answer

A)  Slump
B)  Debris flow
C)  Creep
D)  EarthflowE) All of the above
F) B) and C)

Question 6

Assume this house is located in central Alaska.What did this house do to the local landscape to end up so misaligned?

Accepted Answer

A)  The house shifted because of a mudflow.
B)  The weight of the house generated a debris flow.
C)  A rockfall knocked the house off its foundation.
D)  Heat from the house melted the permafrost below.E) A) and D)
F) None of the above

Question 7

Which region would be most likely to produce a catastrophic landslide?

Accepted Answer

A)  Old, eroded, worn-down mountains
B)  V-shaped stream valley with gentle slopes
C)  Flat-lying floodplains along a stream
D)  Steep, geologically young mountainsE) B) and C)
F) A) and D)

Question 8

Identify the mass-wasting event in this image.

Accepted Answer

A)  Fall
B)  Rockslide
C)  Debris flow
D)  SlumpE) A) and B)
F) A) and C)

Question 9

A ________ is an example of a rotational slide.

Accepted Answer

A)  rockslide
B)  fall
C)  mudflow
D)  slumpE) All of the above
F) A) and C)

Question 10

What is the fastest form of mass wasting?

Accepted Answer

A)  Slide
B)  Slump
C)  Creep
D)  Rock avalancheE) None of the above
F) C) and D)

Question 11

A ________ is not the sole cause of a mass wasting event, but the last of many causes that initiate the downslope movement of materials.

Accepted Answer

A)  debris flow
B)  slide
C)  repose angle
D)  triggerE) B) and C)
F) A) and D)

Question 12

Which of the following mass wasting disasters was triggered by an earthquake?

Accepted Answer

A)  Storm King Mountain, Colorado, 1994
B)  Colorado Front Range, Colorado, 2013
C)  Chengdu, China, 2008
D)  Oso, Washington, 2014E) A) and B)
F) B) and C)

Question 13

A stream is cutting into a valley wall.Which of the following is the most likely trigger for a mass wasting event?

Accepted Answer

A)  The stream will saturate the slope and generate a mudflow.
B)  The stream erodes the toe of the slope, which results in the slope becoming oversteepened.
C)  Upslope trees will be removed, reducing slope strength.
D)  The stream will deposit extra sediment on the slope, increasing the weight on the slope.E) B) and D)
F) None of the above

Question 14

Evaluate the statement, "All lahars are mudflows, but not all mudflows are lahars."

Accepted Answer

Mudflows in general are defined as a rap...

Question 15

What nongeologic term is commonly used to describe a sudden event in which large volumes of material move down steep slopes?

Accepted Answer

A)  Mass Wasting
B)  Carbonization
C)  Landslide
D)  LaharE) All of the above
F) A) and C)

Question 16

What combination of factors was responsible for the disaster west of Yellowstone National Park on August 17, 1959?

Accepted Answer

A)  Rock falls filled a lake with debris until the water overtopped the dam and eroded through the concrete.
B)  Water migrating along foliation layers in the metamorphic rock destabilized a dam, which collapsed and flooded the valley.
C)  A severe earthquake triggered a slide that blocked a river and flooded a campground.
D)  Drainage from the reservoir generated a lahar, which destroyed small towns downstream.E) A) and B)
F) None of the above

Question 17

Mudflows are big enough to move in any direction, regardless of the orientation of the landscape.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following was the cause of the debris flow in Oso, Washington, in March 2014?

Accepted Answer

A)  Volcanic eruptions generated a lahar.
B)  A stream at the base of a slope eroded the toe of the slope away.
C)  Heavy rains saturated the surface materials on the slope.
D)  The slope was oversteepened during construction.E) B) and D)
F) C) and D)

Question 19

Mass wasting is possible only with the aid of a transportation agent such as water, wind, or ice.

Accepted Answer

A) True 
 B)False

Question 20

How can road construction in mountainous areas exacerbate mass wasting?

Accepted Answer

Many mountainous areas have steeply incl...

Exam 15: Mass Wasting

Identify the mass-wasting event in this image.

Correct AnswerverifiedShow Answer

A stream is cutting into a valley wall.Which of the following is the most likely trigger for a mass wasting event?

Correct AnswerverifiedShow Answer

Assume this house is located in central Alaska.What did this house do to the local landscape to end up so misaligned?

Correct AnswerverifiedShow Answer

A ________ is an example of a rotational slide.

Correct AnswerverifiedShow Answer

How did the underlying geology contribute to the Gros Ventre Landslide of 1925?

Correct AnswerverifiedShow Answer

What combination of factors was responsible for the disaster west of Yellowstone National Park on August 17, 1959?

Correct AnswerverifiedShow Answer

What is the fastest form of mass wasting?

Correct AnswerverifiedShow Answer

Mudflows are big enough to move in any direction, regardless of the orientation of the landscape.

Correct AnswerverifiedShow Answer

What is the slowest form of mass wasting?

Correct AnswerverifiedShow Answer

What nongeologic term is commonly used to describe a sudden event in which large volumes of material move down steep slopes?

Correct AnswerverifiedShow Answer

Which region would be most likely to produce a catastrophic landslide?

Correct AnswerverifiedShow Answer

Evaluate the statement, "All lahars are mudflows, but not all mudflows are lahars."

Correct AnswerverifiedMudflows in general are defined as a rap...View AnswerShow Answer

Postfire debris flows are most common in the first 2 years after a fire.

Correct AnswerverifiedShow Answer

Which of the following was the cause of the debris flow in Oso, Washington, in March 2014?

Correct AnswerverifiedShow Answer

A ________ is an example of a translational slide.

Correct AnswerverifiedShow Answer

Which of the following mass wasting disasters was triggered by an earthquake?

Correct AnswerverifiedShow Answer

What is the controlling force of mass wasting?

Correct AnswerverifiedShow Answer

How can road construction in mountainous areas exacerbate mass wasting?

Correct AnswerverifiedMany mountainous areas have steeply incl...View AnswerShow Answer

Mass wasting is possible only with the aid of a transportation agent such as water, wind, or ice.

Correct AnswerverifiedShow Answer

A ________ is not the sole cause of a mass wasting event, but the last of many causes that initiate the downslope movement of materials.

Correct AnswerverifiedShow Answer

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

Correct Answer
verified

Correct Answer
verified
Mudflows in general are defined as a rap...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Many mountainous areas have steeply incl...
View Answer

Correct Answer
verified

Correct Answer
verified