Question 1

____________ are unlikely to occur in regions without volcanic activity.

Accepted Answer

A)  Lahars 
B)  Rockfalls 
C)  Submarine mass movements 
D)  Avalanches 
A)  Lahars 
B)  Rockfalls 
C)  Submarine mass movements 
D)  Avalanches A

Question 2

Highway departments sometimes drill holes into roadside slopes excavated into regolith or weak rock.The holes are drilled to angle slightly upward from the curb,and after drilling is complete a perforated pipe is installed in each hole.How will this help stabilize the roadside slopes?

Accepted Answer

A)  Air within the pipes will help dry out the slope. 
B)  Minerals will precipitate into the pipe where water enters it, making the slope stronger. 
C)  Air and bacteria that enter the hillside via the pipe will introduce rooting systems that will stabililize the slope. 
D)  Groundwater will flow into the pipes and drain out, thus decreasing the saturation of the slope. 
A)  Air within the pipes will help dry out the slope. 
B)  Minerals will precipitate into the pipe where water enters it, making the slope stronger. 
C)  Air and bacteria that enter the hillside via the pipe will introduce rooting systems that will stabililize the slope. 
D)  Groundwater will flow into the pipes and drain out, thus decreasing the saturation of the slope. D

Question 3

Fires and deforestation may lead to slope failure.

Accepted Answer

A) True 
 B)False  True

Question 4

Which of the following increases the risk of mass movement?

Accepted Answer

A)  adding a small amount of moisture to dry sediment 
B)  waves breaking on a beach before reaching a vertical sea cliff 
C)  saturating the sediment with water 
D)  reducing the steepness of the slope 
A)  adding a small amount of moisture to dry sediment 
B)  waves breaking on a beach before reaching a vertical sea cliff 
C)  saturating the sediment with water 
D)  reducing the steepness of the slope

Question 5

The principal difference between a debris flow and a mudflow is the ____________.

Accepted Answer

A)  shape of the path taken by the moving mass 
B)  clastic particles within the moving mass 
C)  debris flow's abundant water, compared to the dry mudflow 
D)  debris flow's pyroclastic debris content from a volcanic eruption 
A)  shape of the path taken by the moving mass 
B)  clastic particles within the moving mass 
C)  debris flow's abundant water, compared to the dry mudflow 
D)  debris flow's pyroclastic debris content from a volcanic eruption

Question 6

Well-rounded sand has a gentler angle of repose than irregularly shaped gravel.

Accepted Answer

A) True 
 B)False

Question 7

____________ may help stabilize slopes to prevent mass wasting.

Accepted Answer

A)  Revegetation 
B)  Regrading 
C)  Preventing undercutting 
D)  All of the above are correct. 
A)  Revegetation 
B)  Regrading 
C)  Preventing undercutting 
D)  All of the above are correct.

Question 8

Which of the following types of mass movement is actually a landslide?

Accepted Answer

A)  slump 
B)  creep 
C)  rock slide 
D)  mudflow 
A)  slump 
B)  creep 
C)  rock slide 
D)  mudflow

Question 9

Which type of mass movement includes a large proportion of ash derived from a volcanic eruption?

Accepted Answer

A)  stromboli 
B)  lahar 
C)  debris flow 
D)  wadi 
A)  stromboli 
B)  lahar 
C)  debris flow 
D)  wadi

Question 10

Look at the remedial measures proposed for unstable grounds in the figures below.Which figures show the remedial measures that would have the most widespread applicability,be the least expensive,and be politically acceptable?

Accepted Answer

A)  C and D 
B)  F and H 
C)  E and G 
D)  A and B 
A)  C and D 
B)  F and H 
C)  E and G 
D)  A and B

Question 11

Which of these processes is illustrated in this diagram?

Accepted Answer

A)  avalanches 
B)  slumping 
C)  creep 
D)  solifluction 
A)  avalanches 
B)  slumping 
C)  creep 
D)  solifluction

Question 12

____________ in metamorphic rock may become a failure surface.

Accepted Answer

A)  Bedding planes 
B)  Exfoliation joints 
C)  Foliation planes 
A)  Bedding planes 
B)  Exfoliation joints 
C)  Foliation planes

Question 13

Which of the following types of mass movement is likely to move most rapidly?

Accepted Answer

A)  slump 
B)  creep 
C)  rock slide 
D)  solifluction 
A)  slump 
B)  creep 
C)  rock slide 
D)  solifluction

Question 14

A warming climate at both higher elevations and polar lattitudes would increase the extent or area in which solifluction occurs.
a.
true
b.
false

Accepted Answer

A) True 
 B)False

Question 15

____________occur(s)when a semicoherent mass of material moves downslope on a failure surface.

Accepted Answer

A)  Avalanches 
B)  Slumps 
C)  Creep 
D)  Solifluction 
A)  Avalanches 
B)  Slumps 
C)  Creep 
D)  Solifluction

Question 16

Which of the following processes probably caused the failure of this riverbank in Costa Rica?

Accepted Answer

A)  a combination of higher river level and stronger current after a recent storm 
B)  a lahar from one of Costa Rica's volcanoes 
C)  a rock slide triggered by an earthquake 
D)  soil creep 
A)  a combination of higher river level and stronger current after a recent storm 
B)  a lahar from one of Costa Rica's volcanoes 
C)  a rock slide triggered by an earthquake 
D)  soil creep

Question 17

One property that geologists use to distinguish among different types of mass wasting is the ____________ of the moving material.

Accepted Answer

A)  weight 
B)  color 
C)  composition 
D)  name 
A)  weight 
B)  color 
C)  composition 
D)  name

Question 18

Unstable slopes start to move when the ____________ force exceeds the ____________ force that holds the material in place.

Accepted Answer

A)  downslope; gravity 
B)  resistance; downslope 
C)  downslope; resistance 
D)  gravity; resistance 
A)  downslope; gravity 
B)  resistance; downslope 
C)  downslope; resistance 
D)  gravity; resistance

Question 19

The principal difference between a slump and a debris slide is the ____________.

Accepted Answer

A)  shape of the path taken by the moving mass 
B)  grain size of the moving mass 
C)  slump's abundant water, compared to the dry debris slide 
D)  slump contains pyroclastic debris from a volcanic eruption 
A)  shape of the path taken by the moving mass 
B)  grain size of the moving mass 
C)  slump's abundant water, compared to the dry debris slide 
D)  slump contains pyroclastic debris from a volcanic eruption

Question 20

Large ____________ may trigger tsunamis.

Accepted Answer

A)  lahars 
B)  submarine mass movements 
C)  avalanches 
D)  rockfalls 
A)  lahars 
B)  submarine mass movements 
C)  avalanches 
D)  rockfalls

Exam 13: Unsafe Ground: Landslides and Other Mass Movements

____________ are unlikely to occur in regions without volcanic activity.

Highway departments sometimes drill holes into roadside slopes excavated into regolith or weak rock.The holes are drilled to angle slightly upward from the curb,and after drilling is complete a perforated pipe is installed in each hole.How will this help stabilize the roadside slopes?

Fires and deforestation may lead to slope failure.

Which of the following increases the risk of mass movement?

The principal difference between a debris flow and a mudflow is the ____________.

Well-rounded sand has a gentler angle of repose than irregularly shaped gravel.

____________ may help stabilize slopes to prevent mass wasting.

Which of the following types of mass movement is actually a landslide?

Which type of mass movement includes a large proportion of ash derived from a volcanic eruption?

Look at the remedial measures proposed for unstable grounds in the figures below.Which figures show the remedial measures that would have the most widespread applicability,be the least expensive,and be politically acceptable?

Which of these processes is illustrated in this diagram?

____________ in metamorphic rock may become a failure surface.

Which of the following types of mass movement is likely to move most rapidly?

A warming climate at both higher elevations and polar lattitudes would increase the extent or area in which solifluction occurs. a. true b. false

____________occur(s)when a semicoherent mass of material moves downslope on a failure surface.

Which of the following processes probably caused the failure of this riverbank in Costa Rica?

One property that geologists use to distinguish among different types of mass wasting is the ____________ of the moving material.

Unstable slopes start to move when the ____________ force exceeds the ____________ force that holds the material in place.

The principal difference between a slump and a debris slide is the ____________.

Large ____________ may trigger tsunamis.

The Earth in Context

The Way the Earth Works: Plate Tectonics

Patterns in Nature: Minerals

Up From the Inferno: Magma and Igneous Rocks

The Wrath of Vulcan: Volcanic Eruptions

Pages of Earths Past: Sedimentary Rocks

Metamorphism: a Process of Change

A Violent Pulse: Earthquakes

Crags, cracks, and Crumples: Crustal Deformation and Mountain Building

Deep Time: How Old Is Old

A Biography of Earth

Riches in Rock: Energy and Mineral Resources

Streams and Floods: the Geology of Running Water

Restless Realm: Oceans and Coasts

A Hidden Reserve: Groundwater

Dry Regions: the Geology of Deserts

Amazing Ice: Glaciers and Ice Ages

Global Change in the Earth System

Rock Groups

A Surface Veneer: Sediments and Soils

The Rock Cycle

The Earths Interior Revisited: Insights From Geophysics

Memories of Past Life: Fossils and Evolution

An Introduction to Landscapes and the Hydrologic Cycle

Filters

Unstable slopes start to move when the force exceeds the force that holds the material in place.