Question 1

Which of the following is the most rapid form of mass wasting?

Accepted Answer

A)   Rock fall
B)   Rock slide
C)   Creep
D)   Earthflow
E)   SlumpF) A) and D)
G) D) and E) A

Question 2

Landslides are a significant hazard on the California coastline and in the Rocky Mountain states.

Accepted Answer

A) True 
 B)False  True

Question 3

Explain the difference between a loose snow and slab avalanche.

Accepted Answer

Loose-snow avalanches typically start at...

Question 4

The Portuguese Bend landslide in California involved an area with weak sedimentary rock that has bedding parallel to the slope and a cliff at the front edge where ocean waves eroded into the cliff.

Accepted Answer

A) True 
 B)False

Question 5

A mudflow is usually not dangerous to human life because it moves at speeds that are imperceptibly slow to the eye.

Accepted Answer

A) True 
 B)False  False

Question 6

Landslides can be a positive event for forests by creating new habitats for plants and animals.

Accepted Answer

A) True 
 B)False

Question 7

The Portuguese Bend landslide in California involved

Accepted Answer

A)   gradual, continuous, downslope movement over a 30 year time period that resulted in damage to many homes.
B)   a volcanic mudflow that killed over 20,000 people despite prior warnings of an imminent landslide threat.
C)   an enormous debris slide that created a giant wave which killed ~2,500 people in a matter of a few minutes.
D)   heavy rains in an area of folded and fractured limestone bedrock with clay layers and underground caves.E) A) and D)
F) A) and C)

Question 8

Which of the following describes a slump?

Accepted Answer

A)   Rocks break off of cliffs and fall to the base of a slope.
B)   Rocks and soil move downslope very slowly.
C)   Rapid downslope movement of snow and ice, sometimes with the addition of rock, soil, and vegetation
D)   Blocks of rock break off and move together, sliding along a curved path.
E)   Mud becomes saturated with water and flows quickly into a streambed.F) A) and B)
G) A) and C)

Question 9

Most snow avalanches are triggered by the victims themselves or by someone in their company.

Accepted Answer

A) True 
 B)False

Question 10

Adding earth material to the lower part of a slope which has the potential for a landslide would

Accepted Answer

A)   increase the resisting force.
B)   decrease the resisting force.
C)   increase the driving force.
D)   decrease the driving force.E) A) and B)
F) A) and C)

Question 11

Growing plants on a slope will always make it more stable because plant roots add strength and cohesion to the soil.

Accepted Answer

A) True 
 B)False

Question 12

Would adding mass to the top of a slope in the form of houses or buildings make the mass more or less likely to slide?

Accepted Answer

A)   It would make it less likely to slide because the houses would add pressure on the slope keeping it stable.
B)   It would make it less likely to slide because the houses make the slope less steep.
C)   It would make it more likely to slide because the houses add weight to the slope making it more unstable.
D)   It would make it more likely to slide because the houses would make the slope more steep.
E)   Adding mass to the top of a slope would not make a difference in the stability of the slope.F) A) and B)
G) A) and C)

Question 13

A slope with sedimentary layering parallel to the ground surface is more stable than a slope with sedimentary layering perpendicular to the ground surface.

Accepted Answer

A) True 
 B)False

Question 14

La Conchita, CA was a site of two massive landslides within 10 years of each other. One theory for the landslide was that it was caused in part by an Avocado Farm at the top of the slope. Explain two different ways that the cultivation of avocadoes could contribute to the slides. Give 3 suggestions for what the avocado growers could do to reduce the occurrence of future slides in the area.

Accepted Answer

Cultivation of avocadoes could contribut...

Question 15

Only one mass wasting type happens at a single time to an individual slope.

Accepted Answer

A) True 
 B)False

Question 16

Volcanic eruptions are the one example of a natural hazard that cannot produce landslides.

Accepted Answer

A) True 
 B)False

Question 17

What is mass wasting?

Accepted Answer

A)   Recycling of ancient earth materials to make slopes for development
B)   Loss of mass from a soil during chemical weathering
C)   Downslope movement of rock, soil, and sediment
D)   Land lost due to explosive volcanic eruptions
E)   Movement of sediment along the coast due to offshore ocean currentsF) B) and D)
G) B) and C)

Question 18

Slumps involve sliding of rock or soil along a curved surface.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following environments is NOT susceptible to mass wasting?

Accepted Answer

A)   A steep and rocky slope
B)   A moderate slope made of fill materials
C)   A gentle slope with deep soils
D)   A slope that has many buildings on it
E)   Relatively flat-lying areaF) A) and C)
G) B) and D)

Question 20

Which of the following is NOT a factor in how urbanization increases the incidence of landslides?

Accepted Answer

A)   Trees and grasses are removed, leaving the land susceptible to erosion.
B)   Roads are constructed altering the permeability of the land.
C)   Buildings are placed on slopes, increasing the weight on the slope.
D)   Roads are cut at the base of slopes increasing instability.
E)   Flood control measures prevent river flooding, which increases the incidence of landslides.F) A) and B)
G) None of the above

Exam 7: Mass Wasting

Which of the following is the most rapid form of mass wasting?

Correct Answer
verified
A

Landslides are a significant hazard on the California coastline and in the Rocky Mountain states.

Correct Answer
verified
True

Explain the difference between a loose snow and slab avalanche.

Correct Answer
verified
Loose-snow avalanches typically start at...
View Answer

The Portuguese Bend landslide in California involved an area with weak sedimentary rock that has bedding parallel to the slope and a cliff at the front edge where ocean waves eroded into the cliff.

Correct Answer
verified

A mudflow is usually not dangerous to human life because it moves at speeds that are imperceptibly slow to the eye.

Correct Answer
verified
False

Landslides can be a positive event for forests by creating new habitats for plants and animals.

Correct Answer
verified

The Portuguese Bend landslide in California involved

Correct Answer
verified

Which of the following describes a slump?

Correct Answer
verified

Most snow avalanches are triggered by the victims themselves or by someone in their company.

Correct Answer
verified

Adding earth material to the lower part of a slope which has the potential for a landslide would

Correct Answer
verified

Growing plants on a slope will always make it more stable because plant roots add strength and cohesion to the soil.

Correct Answer
verified

Would adding mass to the top of a slope in the form of houses or buildings make the mass more or less likely to slide?

Correct Answer
verified

A slope with sedimentary layering parallel to the ground surface is more stable than a slope with sedimentary layering perpendicular to the ground surface.

Correct Answer
verified

Correct Answer
verified
Cultivation of avocadoes could contribut...
View Answer

Only one mass wasting type happens at a single time to an individual slope.

Correct Answer
verified

Volcanic eruptions are the one example of a natural hazard that cannot produce landslides.

Correct Answer
verified

What is mass wasting?

Correct Answer
verified

Slumps involve sliding of rock or soil along a curved surface.

Correct Answer
verified

Which of the following environments is NOT susceptible to mass wasting?

Correct Answer
verified

Which of the following is NOT a factor in how urbanization increases the incidence of landslides?

Correct Answer
verified

Exam 7: Mass Wasting

Which of the following is the most rapid form of mass wasting?

Correct AnswerverifiedA

Landslides are a significant hazard on the California coastline and in the Rocky Mountain states.

Correct AnswerverifiedTrue

Explain the difference between a loose snow and slab avalanche.

Correct AnswerverifiedLoose-snow avalanches typically start at...View AnswerShow Answer

The Portuguese Bend landslide in California involved an area with weak sedimentary rock that has bedding parallel to the slope and a cliff at the front edge where ocean waves eroded into the cliff.

Correct AnswerverifiedShow Answer

A mudflow is usually not dangerous to human life because it moves at speeds that are imperceptibly slow to the eye.

Correct AnswerverifiedFalse

Landslides can be a positive event for forests by creating new habitats for plants and animals.

Correct AnswerverifiedShow Answer

The Portuguese Bend landslide in California involved

Correct AnswerverifiedShow Answer

Which of the following describes a slump?

Correct AnswerverifiedShow Answer

Most snow avalanches are triggered by the victims themselves or by someone in their company.

Correct AnswerverifiedShow Answer

Adding earth material to the lower part of a slope which has the potential for a landslide would

Correct AnswerverifiedShow Answer

Growing plants on a slope will always make it more stable because plant roots add strength and cohesion to the soil.

Correct AnswerverifiedShow Answer

Would adding mass to the top of a slope in the form of houses or buildings make the mass more or less likely to slide?

Correct AnswerverifiedShow Answer

A slope with sedimentary layering parallel to the ground surface is more stable than a slope with sedimentary layering perpendicular to the ground surface.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedCultivation of avocadoes could contribut...View AnswerShow Answer

Only one mass wasting type happens at a single time to an individual slope.

Correct AnswerverifiedShow Answer

Volcanic eruptions are the one example of a natural hazard that cannot produce landslides.

Correct AnswerverifiedShow Answer

What is mass wasting?

Correct AnswerverifiedShow Answer

Slumps involve sliding of rock or soil along a curved surface.

Correct AnswerverifiedShow Answer

Which of the following environments is NOT susceptible to mass wasting?

Correct AnswerverifiedShow Answer

Which of the following is NOT a factor in how urbanization increases the incidence of landslides?

Correct AnswerverifiedShow Answer

Correct Answer
verified
A

Correct Answer
verified
True

Correct Answer
verified
Loose-snow avalanches typically start at...
View Answer

Correct Answer
verified

Correct Answer
verified
False

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
Cultivation of avocadoes could contribut...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified