Question 1

Which of the numbered features is a lahar?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 2

Which of the following is NOT a characteristic of an actively erupting volcano?

Accepted Answer

A)  Totally covered in a fresh blanket of clean, white snow 
B)  Billowing ash column rising into the sky 
C)  Glowing lava flows moving down mountain slopes 
D)  Rapidly melting glaciers/snowpack producing massive mudflows 
A)  Totally covered in a fresh blanket of clean, white snow 
B)  Billowing ash column rising into the sky 
C)  Glowing lava flows moving down mountain slopes 
D)  Rapidly melting glaciers/snowpack producing massive mudflows

Question 3

What is the main type of eruption that formed the volcano in this photograph?

Accepted Answer

A)  fluid lava flows 
B)  eruption of viscous lava 
C)  lava fountain 
D)  eruption column 
E)  pyroclastic flow 
A)  fluid lava flows 
B)  eruption of viscous lava 
C)  lava fountain 
D)  eruption column 
E)  pyroclastic flow

Question 4

When basaltic lava reach the ocean they:

Accepted Answer

A)  cause lava fountains at the vent on land 
B)  form pillow basalts 
C)  can flow long distances on top of the water 
D)  form circular calderas 
E)  all of these 
A)  cause lava fountains at the vent on land 
B)  form pillow basalts 
C)  can flow long distances on top of the water 
D)  form circular calderas 
E)  all of these

Question 5

Which site on the island is the most dangerous?

Accepted Answer

A)  the location of Rock 1 
B)  the location of Rock 2 
C)  the location of Rock 3 
D)  the area of the landslide blocks 
E)  the area of the mudflow deposits 
A)  the location of Rock 1 
B)  the location of Rock 2 
C)  the location of Rock 3 
D)  the area of the landslide blocks 
E)  the area of the mudflow deposits

Question 6

This volcano is relatively small and composed of volcanic cinders. What kind of volcano is it?

Accepted Answer

A)  scoria cone 
B)  shield volcano 
C)  composite volcano 
D)  volcanic dome 
E)  caldera 
A)  scoria cone 
B)  shield volcano 
C)  composite volcano 
D)  volcanic dome 
E)  caldera

Question 7

Comparing these two photographs, which eruption has lower viscosity magma?

Accepted Answer

A)  the fluid cascade of lava 
B)  the circular volcanic feature 
C)  they could have the same viscosity 
D)  there is no way to tell 
A)  the fluid cascade of lava 
B)  the circular volcanic feature 
C)  they could have the same viscosity 
D)  there is no way to tell

Question 8

Prior to an eruption, the surface of a volcano may rise centimeters to hundreds of meters as a result of:

Accepted Answer

A)  injected magma inflating the mountain 
B)  pent-up gas pressure being released 
C)  an increase in SO2 content of volcanic gases 
A)  injected magma inflating the mountain 
B)  pent-up gas pressure being released 
C)  an increase in SO2 content of volcanic gases

Question 9

Hazards associated with basaltic lava flows and eruptions are:

Accepted Answer

A)  burial of roads and neighborhoods by lava flows 
B)  house fires 
C)  floods from catastrophic melting of ice 
D)  all of these 
A)  burial of roads and neighborhoods by lava flows 
B)  house fires 
C)  floods from catastrophic melting of ice 
D)  all of these

Question 10

What types of rocks would be most common in a composite volcano?

Accepted Answer

A)  scoria and other vesicular basalt 
B)  basalt mostly formed in lava flows 
C)  felsic and intermediate lava flows and tephra 
D)  pillow basalts 
E)  none of these 
A)  scoria and other vesicular basalt 
B)  basalt mostly formed in lava flows 
C)  felsic and intermediate lava flows and tephra 
D)  pillow basalts 
E)  none of these

Question 11

What types of rocks would be most common in the volcano in this photograph?

Accepted Answer

A)  scoria and other vesicular basalt 
B)  basalt mostly formed in lava flows 
C)  felsic and intermediate lava flows and tephra 
D)  pillow basalts 
E)  none of these 
A)  scoria and other vesicular basalt 
B)  basalt mostly formed in lava flows 
C)  felsic and intermediate lava flows and tephra 
D)  pillow basalts 
E)  none of these

Question 12

The main hazard of an eruption that forms a large caldera is:

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 13

Long, thin lava flows are typically produced by:

Accepted Answer

A)  volatile-rich eruptions 
B)  high-viscosity lavas 
C)  low-viscosity lavas 
D)  collapsing eruption columns 
A)  volatile-rich eruptions 
B)  high-viscosity lavas 
C)  low-viscosity lavas 
D)  collapsing eruption columns

Question 14

Which of the following is NOT true of basaltic lava flows?

Accepted Answer

A)  They flow downhill from the vent area 
B)  They pile up in steep, cone-shaped hills 
C)  They form from nonexplosive eruptions 
D)  They can issue from the bases of scoria cones 
A)  They flow downhill from the vent area 
B)  They pile up in steep, cone-shaped hills 
C)  They form from nonexplosive eruptions 
D)  They can issue from the bases of scoria cones

Question 15

What is a main hazard of this type of volcano?

Accepted Answer

A)  hot fragments thrown a short distance from the volcano 
B)  burning, building collapse, and suffocation from widely distributed pyroclastic material 
C)  destruction by viscous lava flows that can flow far from the volcano 
D)  volcanic mudflows and landslides 
E)  relatively small pyroclastic eruptions caused by localized explosions or collapse 
A)  hot fragments thrown a short distance from the volcano 
B)  burning, building collapse, and suffocation from widely distributed pyroclastic material 
C)  destruction by viscous lava flows that can flow far from the volcano 
D)  volcanic mudflows and landslides 
E)  relatively small pyroclastic eruptions caused by localized explosions or collapse

Question 16

The typical form for a composite volcano is a:

Accepted Answer

A)  steep-sided cone 
B)  shallowly-sloping shield 
C)  broad, circular crater 
D)  steep-sided dome 
A)  steep-sided cone 
B)  shallowly-sloping shield 
C)  broad, circular crater 
D)  steep-sided dome

Question 17

Which of the following types of eruptions is among the most deadly of natural disasters?

Accepted Answer

A)  Caldera-forming 
B)  Scoria cone-forming 
C)  Basaltic shield-forming 
D)  Geysers 
A)  Caldera-forming 
B)  Scoria cone-forming 
C)  Basaltic shield-forming 
D)  Geysers

Question 18

This volcano is broad and low, and is composed of basaltic lava flows. What kind of volcano is it?

Accepted Answer

A)  scoria cone 
B)  shield volcano 
C)  composite volcano 
D)  volcanic dome 
E)  caldera 
A)  scoria cone 
B)  shield volcano 
C)  composite volcano 
D)  volcanic dome 
E)  caldera

Question 19

Which of the following commonly precede a volcanic eruption?

Accepted Answer

A)  Increased gas flow from a volcano 
B)  Steam eruptions from the volcanic crater 
C)  Increased heat flow from the volcano 
D)  All of these 
A)  Increased gas flow from a volcano 
B)  Steam eruptions from the volcanic crater 
C)  Increased heat flow from the volcano 
D)  All of these

Question 20

Volcanic mudflows can be detected remotely by monitoring:

Accepted Answer

A)  characteristic rumbling produced as they rush down valleys 
B)  rapid changes in groundwater chemistry and volcanic gas conten 
C)  dropping of the ground surface as mudflows are erupted from beneath the volcano 
A)  characteristic rumbling produced as they rush down valleys 
B)  rapid changes in groundwater chemistry and volcanic gas conten 
C)  dropping of the ground surface as mudflows are erupted from beneath the volcano

Which of the numbered features is a lahar?

Which of the following is NOT a characteristic of an actively erupting volcano?

What is the main type of eruption that formed the volcano in this photograph?

When basaltic lava reach the ocean they:

Which site on the island is the most dangerous?

This volcano is relatively small and composed of volcanic cinders. What kind of volcano is it?

Comparing these two photographs, which eruption has lower viscosity magma?

Prior to an eruption, the surface of a volcano may rise centimeters to hundreds of meters as a result of:

Hazards associated with basaltic lava flows and eruptions are:

What types of rocks would be most common in a composite volcano?

What types of rocks would be most common in the volcano in this photograph?

The main hazard of an eruption that forms a large caldera is:

Long, thin lava flows are typically produced by:

Which of the following is NOT true of basaltic lava flows?

What is a main hazard of this type of volcano?

The typical form for a composite volcano is a:

Which of the following types of eruptions is among the most deadly of natural disasters?

This volcano is broad and low, and is composed of basaltic lava flows. What kind of volcano is it?

Which of the following commonly precede a volcanic eruption?

Volcanic mudflows can be detected remotely by monitoring:

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

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Glaciers, Shorelines, and Changing Sea Levels

Weathering, Soil, and Unstable Slopes

Streams and Flooding

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Exam 6: Volcanoes and Volcanic Hazards

Which of the numbered features is a lahar?

Which of the following is NOT a characteristic of an actively erupting volcano?

What is the main type of eruption that formed the volcano in this photograph?

When basaltic lava reach the ocean they:

Which site on the island is the most dangerous?

This volcano is relatively small and composed of volcanic cinders. What kind of volcano is it?

Comparing these two photographs, which eruption has lower viscosity magma?

Prior to an eruption, the surface of a volcano may rise centimeters to hundreds of meters as a result of:

Hazards associated with basaltic lava flows and eruptions are:

What types of rocks would be most common in a composite volcano?

What types of rocks would be most common in the volcano in this photograph?

The main hazard of an eruption that forms a large caldera is:

Long, thin lava flows are typically produced by:

Which of the following is NOT true of basaltic lava flows?

What is a main hazard of this type of volcano?

The typical form for a composite volcano is a:

Which of the following types of eruptions is among the most deadly of natural disasters?

This volcano is broad and low, and is composed of basaltic lava flows. What kind of volcano is it?

Which of the following commonly precede a volcanic eruption?

Volcanic mudflows can be detected remotely by monitoring:

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