Question 1

Which of the following is/are true?

Accepted Answer

A)  Clay minerals make for very stable slopes because they bake and harden in the sun. 
B)  An unstable slope can be stabilized by removing material to reduce the slope angle. 
C)  Natural slopes, once formed, remain stable unless disturbed by human activities. 
D)  All of the choices are correct. 
A)  Clay minerals make for very stable slopes because they bake and harden in the sun. 
B)  An unstable slope can be stabilized by removing material to reduce the slope angle. 
C)  Natural slopes, once formed, remain stable unless disturbed by human activities. 
D)  All of the choices are correct. B

Question 2

Which is/are true?

Accepted Answer

A)  Curved tree trunks and tilted utility poles may be signs of soil creep 
B)  In a true slide, movement of a coherent mass of material occurs along a well-defined plane 
C)  Surfaces of ancient landslides often have a lumpy (hummocky) appearance 
D)  All of the choices are true.
Scrambling: Locked. 
A)  Curved tree trunks and tilted utility poles may be signs of soil creep 
B)  In a true slide, movement of a coherent mass of material occurs along a well-defined plane 
C)  Surfaces of ancient landslides often have a lumpy (hummocky) appearance 
D)  All of the choices are true.
Scrambling: Locked. D

Question 3

The reason clay minerals (and other phyllosilicate)often form the slip plane for a landslide is that they

Accepted Answer

A)  Have platy structures, allowing them to stack up and then slip past each other, like a deck of cards and also have high porosity. 
B)  Have rigid structures that can trap oil and the oil acts as a lubricant for the landslide. 
C)  Are made of material that dissolves easily in water, initiating a landslide in the process. 
D)  Change their internal structure under stress, allowing them to get "mushy" and thus be slippery. 
A)  Have platy structures, allowing them to stack up and then slip past each other, like a deck of cards and also have high porosity. 
B)  Have rigid structures that can trap oil and the oil acts as a lubricant for the landslide. 
C)  Are made of material that dissolves easily in water, initiating a landslide in the process. 
D)  Change their internal structure under stress, allowing them to get "mushy" and thus be slippery. A

Question 4

The removal of vegetation always makes soil-covered slopes more stable because it removes excess weight.

Accepted Answer

A) True 
 B)False

Question 5

Mass wasting

Accepted Answer

A)  Is a formal term for the weathering of rock masses. 
B)  Represents the process of lava flow. 
C)  Is the movement of material (rock or soil) down slope due to gravity. 
D)  Is the movement of material by wind. 
A)  Is a formal term for the weathering of rock masses. 
B)  Represents the process of lava flow. 
C)  Is the movement of material (rock or soil) down slope due to gravity. 
D)  Is the movement of material by wind.

Question 6

Mass movements owing to downslope pull is called

Accepted Answer

A)  Shear strength. 
B)  Shear pull. 
C)  Shear power. 
D)  Shear stress. 
A)  Shear strength. 
B)  Shear pull. 
C)  Shear power. 
D)  Shear stress.

Question 7

Heavy rains and thick tropical soils caused landslides and debris flows along the Venezuelan coast.

Accepted Answer

A) True 
 B)False

Question 8

Rock falls

Accepted Answer

A)  Occur only on mountain sides in dry climates. 
B)  Occur on any steep-faced cliff, including under waterfalls. 
C)  Cause the "nick point" in a stream to migrate downstream with time. 
D)  Are unaffected by waves slamming against the base of a sea cliff. 
A)  Occur only on mountain sides in dry climates. 
B)  Occur on any steep-faced cliff, including under waterfalls. 
C)  Cause the "nick point" in a stream to migrate downstream with time. 
D)  Are unaffected by waves slamming against the base of a sea cliff.

Question 9

Factors contributing to the Vaiont Reservoir landslide included all of the following except

Accepted Answer

A)  Heavy rains. 
B)  Filling of the reservoir. 
C)  The presence of clay-rich layers in the valley wall rocks. 
D)  Earthquakes. 
A)  Heavy rains. 
B)  Filling of the reservoir. 
C)  The presence of clay-rich layers in the valley wall rocks. 
D)  Earthquakes.

Question 10

Quick clays are characteristically found in

Accepted Answer

A)  Northern subtropical regions. 
B)  Northern temperate regions. 
C)  Northern equatorial regions. 
D)  Northern polar regions. 
A)  Northern subtropical regions. 
B)  Northern temperate regions. 
C)  Northern equatorial regions. 
D)  Northern polar regions.

Question 11

This type of mass wasting is a hazard within Yosemite National Park

Accepted Answer

A)  Slumps. 
B)  Rock slides and rock falls. 
C)  Debris flows. 
D)  Rock creep. 
A)  Slumps. 
B)  Rock slides and rock falls. 
C)  Debris flows. 
D)  Rock creep.

Question 12

Soil creep

Accepted Answer

A)  Cannot be recognized or detected because it is such a slow process. 
B)  Is more of a hazard to property than to lives. 
C)  Commonly triggers snow avalanches because it makes overlying snow unstable. 
D)  All of the choices are correct. 
A)  Cannot be recognized or detected because it is such a slow process. 
B)  Is more of a hazard to property than to lives. 
C)  Commonly triggers snow avalanches because it makes overlying snow unstable. 
D)  All of the choices are correct.

Question 13

A landslide warning system,developed in California,utilizes all of the following except

Accepted Answer

A)  The past history of sliding in an area. 
B)  Quantitative relationships between storm intensity and duration and resultant sliding. 
C)  Laboratory studies of response of slopes to earthquakes. 
D)  Characteristics of slopes, such as angles and soil types. 
A)  The past history of sliding in an area. 
B)  Quantitative relationships between storm intensity and duration and resultant sliding. 
C)  Laboratory studies of response of slopes to earthquakes. 
D)  Characteristics of slopes, such as angles and soil types.

Question 14

Landslides never take lives because they move slowly.

Accepted Answer

A) True 
 B)False

Question 15

A thin,shallowly inclined rockslide might best be stabilized by

Accepted Answer

A)  The use of rock bolts. 
B)  The addition of fluid to make the rock swell and stick. 
C)  Driving long, thin piles into rocks below. 
D)  Heating and baking the rocks to solidify them. 
A)  The use of rock bolts. 
B)  The addition of fluid to make the rock swell and stick. 
C)  Driving long, thin piles into rocks below. 
D)  Heating and baking the rocks to solidify them.

Question 16

Which of the following is the slowest form of mass movement?

Accepted Answer

A)  Soil creep 
B)  Slumps 
C)  Rock falls 
D)  Rock slides 
A)  Soil creep 
B)  Slumps 
C)  Rock falls 
D)  Rock slides

Question 17

Debris flows

Accepted Answer

A)  May move rapidly and transport rock materials of greatly different size. 
B)  Are common in semi-arid regions. 
C)  Are not fluids in their behavior, but are dry flows of material. 
D)  Both may move rapidly and transport rock materials of greatly different size and are common in semi-arid regions are correct. 
A)  May move rapidly and transport rock materials of greatly different size. 
B)  Are common in semi-arid regions. 
C)  Are not fluids in their behavior, but are dry flows of material. 
D)  Both may move rapidly and transport rock materials of greatly different size and are common in semi-arid regions are correct.

Question 18

Construction of a reservoir behind a dam

Accepted Answer

A)  Stabilizes the sides of the reservoir walls; the water buoys them up. 
B)  Can destabilize the slopes by increasing pore fluid pressure. 
C)  Destabilizes the slopes because of the weight of the dam. 
D)  Has no effect on slope stability. 
A)  Stabilizes the sides of the reservoir walls; the water buoys them up. 
B)  Can destabilize the slopes by increasing pore fluid pressure. 
C)  Destabilizes the slopes because of the weight of the dam. 
D)  Has no effect on slope stability.

Question 19

All of the following could increase the risk of landslide on a slope except

Accepted Answer

A)  Use of septic tanks. 
B)  Building a house on the slope. 
C)  Planting shrubs with extensive root systems. 
D)  Adding fill at the top of the slope to build a road. 
A)  Use of septic tanks. 
B)  Building a house on the slope. 
C)  Planting shrubs with extensive root systems. 
D)  Adding fill at the top of the slope to build a road.

Question 20

Where rotational movement of soil is accompanied by downslope movement the feature that is observed is a

Accepted Answer

A)  Scarp. 
B)  Talus. 
C)  Slump. 
D)  Solifluction. 
A)  Scarp. 
B)  Talus. 
C)  Slump. 
D)  Solifluction.

Which of the following is/are true?

Which is/are true?

The reason clay minerals (and other phyllosilicate)often form the slip plane for a landslide is that they

The removal of vegetation always makes soil-covered slopes more stable because it removes excess weight.

Mass wasting

Mass movements owing to downslope pull is called

Heavy rains and thick tropical soils caused landslides and debris flows along the Venezuelan coast.

Rock falls

Factors contributing to the Vaiont Reservoir landslide included all of the following except

Quick clays are characteristically found in

This type of mass wasting is a hazard within Yosemite National Park

Soil creep

A landslide warning system,developed in California,utilizes all of the following except

Landslides never take lives because they move slowly.

A thin,shallowly inclined rockslide might best be stabilized by

Which of the following is the slowest form of mass movement?

Debris flows

Construction of a reservoir behind a dam

All of the following could increase the risk of landslide on a slope except

Where rotational movement of soil is accompanied by downslope movement the feature that is observed is a

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Exam 8: Mass Movements

Which of the following is/are true?

Which is/are true?

The reason clay minerals (and other phyllosilicate)often form the slip plane for a landslide is that they

The removal of vegetation always makes soil-covered slopes more stable because it removes excess weight.

Mass wasting

Mass movements owing to downslope pull is called

Heavy rains and thick tropical soils caused landslides and debris flows along the Venezuelan coast.

Rock falls

Factors contributing to the Vaiont Reservoir landslide included all of the following except

Quick clays are characteristically found in

This type of mass wasting is a hazard within Yosemite National Park

Soil creep

A landslide warning system,developed in California,utilizes all of the following except

Landslides never take lives because they move slowly.

A thin,shallowly inclined rockslide might best be stabilized by

Which of the following is the slowest form of mass movement?

Debris flows

Construction of a reservoir behind a dam

All of the following could increase the risk of landslide on a slope except

Where rotational movement of soil is accompanied by downslope movement the feature that is observed is a

Planet and Population: An Overview

Rocks and Minerals-A First Look

Plate Tectonics

Earthquakes

Volcanoes

Streams and Flooding

Coastal Zones and Processes

Ice and Glaciers,wind and Deserts

Climate-Past, present, and Future

Ground Water and Water Resources

Weathering, erosion, and Soil Resources

Mineral and Rock Resources

Energy Resources-Fossil Fuels

Energy Resources-Alternative Sources

Waste Disposal

Water Pollution

Air Pollution

Environmental Law and Policy

Land-Use Planning and Engineering Geology

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