Question 1

A phreatic volcanic eruption

Accepted Answer

A)  Involves ash only. 
B)  Is the same type of eruption as a nuée ardente. 
C)  Only occurs at rift zones. 
D)  Results from groundwater that becomes steam upon magmatic heating. 
A)  Involves ash only. 
B)  Is the same type of eruption as a nuée ardente. 
C)  Only occurs at rift zones. 
D)  Results from groundwater that becomes steam upon magmatic heating.

Question 2

To halt a pyroclastic flow,one could use many of the same techniques as are used for lava,because both are flowing fluids.

Accepted Answer

A) True 
 B)False

Question 3

Yellowstone National Park is underlain by an ancient volcanic caldera and current thermal activity and uplift there may signal future eruption potential.

Accepted Answer

A) True 
 B)False

Question 4

The rock type that forms at new seafloor spreading centers is

Accepted Answer

A)  Andesitic. 
B)  Rhyolitic. 
C)  Granitic. 
D)  Basaltic. 
A)  Andesitic. 
B)  Rhyolitic. 
C)  Granitic. 
D)  Basaltic.

Question 5

So far,Mount St.Helens is the only volcano in the Cascade Range to show any sign of thermal activity.

Accepted Answer

A) True 
 B)False

Question 6

The 1991 eruption of Mt.Pinatubo caused global cooling because it

Accepted Answer

A)  Added ozone to the ozone layer. 
B)  Produced sulfuric acid droplets in the atmosphere that blocked incoming sunlight. 
C)  Caused increased evaporation of cool water vapor from the oceans. 
D)  Produced very strong winds that cooled the continents. 
A)  Added ozone to the ozone layer. 
B)  Produced sulfuric acid droplets in the atmosphere that blocked incoming sunlight. 
C)  Caused increased evaporation of cool water vapor from the oceans. 
D)  Produced very strong winds that cooled the continents.

Question 7

A volcano built of many thin flows of fluid lava is a

Accepted Answer

A)  Shield volcano. 
B)  Composite volcano. 
C)  Cinder cone. 
D)  Subduction-zone volcano. 
A)  Shield volcano. 
B)  Composite volcano. 
C)  Cinder cone. 
D)  Subduction-zone volcano.

Question 8

The Pacific Ring of Fire is

Accepted Answer

A)  A nearly circular region of fissure eruptions in the Pacific Ocean basin. 
B)  Volcanic activity related to subduction zones and spreading zones rimming the Pacific Ocean basin. 
C)  A region of nearly continuous eruption of nueé ardentes in the Pacific Ocean basin. 
D)  The region defined by the Hawaiian Islands and the adjacent underwater volcanoes known as seamounts. 
E)  A doughnut-shaped eruption characteristic of Pacific Islands, which, when dormant is called an atoll. 
A)  A nearly circular region of fissure eruptions in the Pacific Ocean basin. 
B)  Volcanic activity related to subduction zones and spreading zones rimming the Pacific Ocean basin. 
C)  A region of nearly continuous eruption of nueé ardentes in the Pacific Ocean basin. 
D)  The region defined by the Hawaiian Islands and the adjacent underwater volcanoes known as seamounts. 
E)  A doughnut-shaped eruption characteristic of Pacific Islands, which, when dormant is called an atoll.

Question 9

The Yellowstone Park volcanic area is along a hot-spot track across the northwestern United States.

Accepted Answer

A) True 
 B)False

Question 10

Mafic magmas

Accepted Answer

A)  May contain up to about 75 percent SiO2 by weight. 
B)  Are viscous and do not flow easily. 
C)  Tend to inhibit passage of gas that tries to escape through it. 
D)  Result in less violent eruptions than felsic to intermediate magmas. 
A)  May contain up to about 75 percent SiO2 by weight. 
B)  Are viscous and do not flow easily. 
C)  Tend to inhibit passage of gas that tries to escape through it. 
D)  Result in less violent eruptions than felsic to intermediate magmas.

Question 11

A volcanic landform built of entirely of pyroclastics of basaltic composition is a

Accepted Answer

A)  Shield volcano. 
B)  Cinder cone. 
C)  Volcanic dome. 
D)  Nuée ardente. 
A)  Shield volcano. 
B)  Cinder cone. 
C)  Volcanic dome. 
D)  Nuée ardente.

A phreatic volcanic eruption

To halt a pyroclastic flow,one could use many of the same techniques as are used for lava,because both are flowing fluids.

Yellowstone National Park is underlain by an ancient volcanic caldera and current thermal activity and uplift there may signal future eruption potential.

The rock type that forms at new seafloor spreading centers is

So far,Mount St.Helens is the only volcano in the Cascade Range to show any sign of thermal activity.

The 1991 eruption of Mt.Pinatubo caused global cooling because it

A volcano built of many thin flows of fluid lava is a

The Pacific Ring of Fire is

The Yellowstone Park volcanic area is along a hot-spot track across the northwestern United States.

Mafic magmas

A volcanic landform built of entirely of pyroclastics of basaltic composition is a

Planet and Population: An Overview

Rocks and Minerals-A First Look

Plate Tectonics

Earthquakes

Streams and Flooding

Coastal Zones and Processes

Mass Movements

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

Filters

Exam 5: Volcanoes

A phreatic volcanic eruption

To halt a pyroclastic flow,one could use many of the same techniques as are used for lava,because both are flowing fluids.

Yellowstone National Park is underlain by an ancient volcanic caldera and current thermal activity and uplift there may signal future eruption potential.

The rock type that forms at new seafloor spreading centers is

So far,Mount St.Helens is the only volcano in the Cascade Range to show any sign of thermal activity.

The 1991 eruption of Mt.Pinatubo caused global cooling because it

A volcano built of many thin flows of fluid lava is a

The Pacific Ring of Fire is

The Yellowstone Park volcanic area is along a hot-spot track across the northwestern United States.

Mafic magmas

A volcanic landform built of entirely of pyroclastics of basaltic composition is a

Planet and Population: An Overview

Rocks and Minerals-A First Look

Plate Tectonics

Earthquakes

Streams and Flooding

Coastal Zones and Processes

Mass Movements

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

Filters