Question 1

Which of the following are characteristics of actively erupting volcanoes?

Accepted Answer

A)  Glowing orange lava flowing downhill 
B)  Fragments of molten rock blasting into the air 
C)  Billowing clouds of ash rising into the air 
D)  All of these 
A)  Glowing orange lava flowing downhill 
B)  Fragments of molten rock blasting into the air 
C)  Billowing clouds of ash rising into the air 
D)  All of these

Question 2

What kind of volcano is in this figure?

Accepted Answer

A)  scoria cone 
B)  large shield volcano 
C)  small shield volcano 
D)  composite volcano 
E)  caldera 
A)  scoria cone 
B)  large shield volcano 
C)  small shield volcano 
D)  composite volcano 
E)  caldera

Question 3

Which of these volcanic hazards associated with Mount Rainier is the most dangerous to nearby population centers?

Accepted Answer

A)  mudflows 
B)  pahoehoe flows 
C)  lava flows 
A)  mudflows 
B)  pahoehoe flows 
C)  lava flows

Question 4

What was the most damaging type of eruption that occurred at Vesuvius in Italy?

Accepted Answer

A)  A huge landslide caused a lateral blast that knocked down trees and buildings. 
B)  A fast-moving viscous lava flow flowed through the middle of Pompeii. 
C)  The volcano was so heavy that it caused part of the island to collapse. 
D)  One or more pyroclastic flows hit the city of Pompeii. 
E)  None of these. 
A)  A huge landslide caused a lateral blast that knocked down trees and buildings. 
B)  A fast-moving viscous lava flow flowed through the middle of Pompeii. 
C)  The volcano was so heavy that it caused part of the island to collapse. 
D)  One or more pyroclastic flows hit the city of Pompeii. 
E)  None of these.

Question 5

What type of basaltic feature is shown in this photograph?

Accepted Answer

A)  vesicles 
B)  volcanic bomb 
C)  aa lava flow 
D)  pahoehoe lava flow 
E)  pyroclastic flow 
A)  vesicles 
B)  volcanic bomb 
C)  aa lava flow 
D)  pahoehoe lava flow 
E)  pyroclastic flow

Question 6

What are some factors that could allow flood basalts to have high-volume eruptions?

Accepted Answer

A)  a large amount of magma is generated in the mantle 
B)  magma rises to the surface along thick dikes 
C)  the magma is hot and has a low viscosity 
D)  all of these 
A)  a large amount of magma is generated in the mantle 
B)  magma rises to the surface along thick dikes 
C)  the magma is hot and has a low viscosity 
D)  all of these

Question 7

What type of eruption formed this flow-banded rhyolite?

Accepted Answer

A)  a viscous lava flow 
B)  a pyroclastic column 
C)  a pyroclastic flow 
D)  a lava that broke apart while it flowed 
E)  a lava fountain 
A)  a viscous lava flow 
B)  a pyroclastic column 
C)  a pyroclastic flow 
D)  a lava that broke apart while it flowed 
E)  a lava fountain

Question 8

What type of eruption formed this flow-banded obsidian?

Accepted Answer

A)  a viscous lava flow 
B)  a pyroclastic column 
C)  a pyroclastic flow 
D)  a lava that broke apart while it flowed 
E)  a lava fountain 
A)  a viscous lava flow 
B)  a pyroclastic column 
C)  a pyroclastic flow 
D)  a lava that broke apart while it flowed 
E)  a lava fountain

Question 9

Shield volcanoes, like Mauna Loa, have what kind of slopes?

Accepted Answer

A)  broad, gentle 
B)  nearly level 
C)  extremely steep 
A)  broad, gentle 
B)  nearly level 
C)  extremely steep

Question 10

Which of the following is NOT true of calderas?

Accepted Answer

A)  They are produced by removal of easily eroded pyroclastic materials 
B)  They commonly contain layers of volcanic ash and volcanic domes. 
C)  They are bounded by steep topographic scarps with a generally basin-shaped outline. 
D)  They form from the collapse of the ground surface into an emptied magma chamber below. 
A)  They are produced by removal of easily eroded pyroclastic materials 
B)  They commonly contain layers of volcanic ash and volcanic domes. 
C)  They are bounded by steep topographic scarps with a generally basin-shaped outline. 
D)  They form from the collapse of the ground surface into an emptied magma chamber below.

Question 11

Which of the following are NOT differences between an eruption column and pyroclastic flow?

Accepted Answer

A)  Tephra in an eruption column mostly cools before it reaches the ground. 
B)  A pyroclastic flow mostly flows downhill, whereas a column rises at first. 
C)  Damage from an eruption column can be more widespread. 
D)  Pyroclastic flows form from a higher gas flux. 
A)  Tephra in an eruption column mostly cools before it reaches the ground. 
B)  A pyroclastic flow mostly flows downhill, whereas a column rises at first. 
C)  Damage from an eruption column can be more widespread. 
D)  Pyroclastic flows form from a higher gas flux.

Question 12

What type of basaltic feature is shown in this photograph?

Accepted Answer

A)  vesicles 
B)  volcanic bomb 
C)  aa lava flow 
D)  pahoehoe lava flow 
E)  pyroclastic flow 
A)  vesicles 
B)  volcanic bomb 
C)  aa lava flow 
D)  pahoehoe lava flow 
E)  pyroclastic flow

Question 13

The crater at Crater Lake was formed by:

Accepted Answer

A)  collapse of overlying rocks into an emptied magma chamber 
B)  an asteroid impact 
C)  the erosion of ash and cinders from a circular basin filled with pyroclastics 
D)  formation of a large sinkhole over a collapsed limestone cavern system 
A)  collapse of overlying rocks into an emptied magma chamber 
B)  an asteroid impact 
C)  the erosion of ash and cinders from a circular basin filled with pyroclastics 
D)  formation of a large sinkhole over a collapsed limestone cavern system

Question 14

The most damaging type of eruption that occurred at Mount Pelée, Martinique was:

Accepted Answer

A)  A huge landslide caused a lateral blast that knocked down trees and buildings. 
B)  A fast-moving viscous lava flow flowed through the middle of St. Pierre. 
C)  The volcano was so heavy that it caused part of the island to collapse. 
D)  One or more pyroclastic flows hit the city of St. Pierre. 
E)  None of these. 
A)  A huge landslide caused a lateral blast that knocked down trees and buildings. 
B)  A fast-moving viscous lava flow flowed through the middle of St. Pierre. 
C)  The volcano was so heavy that it caused part of the island to collapse. 
D)  One or more pyroclastic flows hit the city of St. Pierre. 
E)  None of these.

Question 15

Which of the following is the best indicator that a volcano might be very dangerous?

Accepted Answer

A)  gentle slopes that signify fast-flowing lavas 
B)  rock analyses that indicate a low content of silica 
C)  a volcano that contains andesite and welded tuffs 
D)  ages that indicate the volcano last erupted 10 million years ago 
A)  gentle slopes that signify fast-flowing lavas 
B)  rock analyses that indicate a low content of silica 
C)  a volcano that contains andesite and welded tuffs 
D)  ages that indicate the volcano last erupted 10 million years ago

Question 16

What is a main hazard of this type of volcano?

Accepted Answer

A)  burning, building collapse, and suffocation from an eruption column and pyroclastic flows 
B)  volcanic mudflows and landslides 
C)  hot fragments thrown a short distance from the volcano 
D)  destruction by moderately fluid lava flows that can flow far from the volcano 
A)  burning, building collapse, and suffocation from an eruption column and pyroclastic flows 
B)  volcanic mudflows and landslides 
C)  hot fragments thrown a short distance from the volcano 
D)  destruction by moderately fluid lava flows that can flow far from the volcano

Question 17

Flood basalts influence life on Earth because:

Accepted Answer

A)  Large volumes of flood basalts are erupted during a short time 
B)  Eruptions can release large amounts of gas that cool the atmosphere 
C)  Eruptions can release large amounts of gas that warm the atmosphere 
D)  All of these 
A)  Large volumes of flood basalts are erupted during a short time 
B)  Eruptions can release large amounts of gas that cool the atmosphere 
C)  Eruptions can release large amounts of gas that warm the atmosphere 
D)  All of these

Question 18

Which of the following is typically erupted from a volcano?

Accepted Answer

A)  Scalding hot ash, lava, and gases 
B)  Ice and snow, combined with steam 
C)  Large quantities of liquid water 
A)  Scalding hot ash, lava, and gases 
B)  Ice and snow, combined with steam 
C)  Large quantities of liquid water

Question 19

What type of material likely composes this volcano?

Accepted Answer

A)  felsic to intermediate lava flows 
B)  pyroclastic flows 
C)  volcanic mudflows and landslides 
D)  all of these 
A)  felsic to intermediate lava flows 
B)  pyroclastic flows 
C)  volcanic mudflows and landslides 
D)  all of these

Question 20

Which of the following is NOT a hazard typically associated with scoria cones?

Accepted Answer

A)  Bulldozing of houses from their foundations 
B)  Air quality reduction by ash and volcanic gases 
C)  Falling volcanic bombs and cinders 
A)  Bulldozing of houses from their foundations 
B)  Air quality reduction by ash and volcanic gases 
C)  Falling volcanic bombs and cinders

Which of the following are characteristics of actively erupting volcanoes?

What kind of volcano is in this figure?

Which of these volcanic hazards associated with Mount Rainier is the most dangerous to nearby population centers?

What was the most damaging type of eruption that occurred at Vesuvius in Italy?

What type of basaltic feature is shown in this photograph?

What are some factors that could allow flood basalts to have high-volume eruptions?

What type of eruption formed this flow-banded rhyolite?

What type of eruption formed this flow-banded obsidian?

Shield volcanoes, like Mauna Loa, have what kind of slopes?

Which of the following is NOT true of calderas?

Which of the following are NOT differences between an eruption column and pyroclastic flow?

What type of basaltic feature is shown in this photograph?

The crater at Crater Lake was formed by:

The most damaging type of eruption that occurred at Mount Pelée, Martinique was:

Which of the following is the best indicator that a volcano might be very dangerous?

What is a main hazard of this type of volcano?

Flood basalts influence life on Earth because:

Which of the following is typically erupted from a volcano?

What type of material likely composes this volcano?

Which of the following is NOT a hazard typically associated with scoria cones?

The Nature of Geology

Investigating Geologic Questions

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Igneous Environments

Sedimentary Environments

Deformation and Metamorphism

Geologic Time

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Earthquakes and Earths Interior

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Glaciers, Shorelines, and Changing Sea Levels

Weathering, Soil, and Unstable Slopes

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Exam 6: Volcanoes and Volcanic Hazards

Which of the following are characteristics of actively erupting volcanoes?

What kind of volcano is in this figure?

Which of these volcanic hazards associated with Mount Rainier is the most dangerous to nearby population centers?

What was the most damaging type of eruption that occurred at Vesuvius in Italy?

What type of basaltic feature is shown in this photograph?

What are some factors that could allow flood basalts to have high-volume eruptions?

What type of eruption formed this flow-banded rhyolite?

What type of eruption formed this flow-banded obsidian?

Shield volcanoes, like Mauna Loa, have what kind of slopes?

Which of the following is NOT true of calderas?

Which of the following are NOT differences between an eruption column and pyroclastic flow?

What type of basaltic feature is shown in this photograph?

The crater at Crater Lake was formed by:

The most damaging type of eruption that occurred at Mount Pelée, Martinique was:

Which of the following is the best indicator that a volcano might be very dangerous?

What is a main hazard of this type of volcano?

Flood basalts influence life on Earth because:

Which of the following is typically erupted from a volcano?

What type of material likely composes this volcano?

Which of the following is NOT a hazard typically associated with scoria cones?

The Nature of Geology

Investigating Geologic Questions

Plate Tectonics

Earth Materials

Igneous Environments

Sedimentary Environments

Deformation and Metamorphism

Geologic Time

Seafloor and Continental Margins

Mountains, Basins, and Continents

Earthquakes and Earths Interior

Climate and Weathering

Glaciers, Shorelines, and Changing Sea Levels

Weathering, Soil, and Unstable Slopes

Streams and Flooding

Water Resources

Energy and Mineral Resources

Geology of the Solar System

Filters