Question 1

Which represents the largest igneous eruptions on Earth?

Accepted Answer

A)  Flood basalts 
B)  Rhyolite ash columns 
C)  Curtains of fire 
A)  Flood basalts 
B)  Rhyolite ash columns 
C)  Curtains of fire A

Question 2

Which of the following is NOT a major controlling factor on volcanic eruption style?

Accepted Answer

A)  Age of volcano 
B)  Chemistry of the magma 
C)  Magma volatile content 
A)  Age of volcano 
B)  Chemistry of the magma 
C)  Magma volatile content A

Question 3

Which of the following sites has volcanism related to a hot spot or divergent margin? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a mid-ocean ridge.

Accepted Answer

A)  A and B 
B)  B and C 
C)  C and D 
D)  A and C 
E)  B and D 
A)  A and B 
B)  B and C 
C)  C and D 
D)  A and C 
E)  B and D C

Question 4

Huge circular depressions from which volcanoes erupt are called:

Accepted Answer

A)  calderas 
B)  fissures 
C)  cones 
A)  calderas 
B)  fissures 
C)  cones

Question 5

What type of volcanic eruption is probably shown in this photograph?

Accepted Answer

A)  pyroclastic flow 
B)  fire fountain 
C)  basaltic lava flow 
D)  felsic lava flow 
E)  caldera eruption 
A)  pyroclastic flow 
B)  fire fountain 
C)  basaltic lava flow 
D)  felsic lava flow 
E)  caldera eruption

Question 6

This igneous rock contains flattened pieces of pumice and small crystals of quartz and feldspar. What type of rock is it?

Accepted Answer

A)  basalt 
B)  rhyolite or obsidian 
C)  welded tuff 
D)  volcanic breccia 
A)  basalt 
B)  rhyolite or obsidian 
C)  welded tuff 
D)  volcanic breccia

Question 7

Volcanic domes commonly are partially destroyed when:

Accepted Answer

A)  gases are released slowly out the top of the dome, dissolving it 
B)  steep parts of the dome collapse and cause small pyroclastic flows 
C)  fast-moving, low-viscosity lava carries away part of the dome 
D)  the center of the dome collapses, forming a composite volcano 
E)  all of these 
A)  gases are released slowly out the top of the dome, dissolving it 
B)  steep parts of the dome collapse and cause small pyroclastic flows 
C)  fast-moving, low-viscosity lava carries away part of the dome 
D)  the center of the dome collapses, forming a composite volcano 
E)  all of these

Question 8

Scoria cones are composed primarily of:

Accepted Answer

A)  ejected fragments of vesicular lava 
B)  blocky lava flows and lahar deposits 
C)  pahoehoe and/or a'a 
D)  volcanic ash 
A)  ejected fragments of vesicular lava 
B)  blocky lava flows and lahar deposits 
C)  pahoehoe and/or a'a 
D)  volcanic ash

Question 9

Which of the following is NOT a way in which a volcano's history indicates the level of hazard it poses to nearby population centers?

Accepted Answer

A)  Length of time since last eruption 
B)  Average time between eruptions 
C)  Abundance of felsic pyroclastic materials in its deposits 
D)  Age of the oldest volcanic layer present 
A)  Length of time since last eruption 
B)  Average time between eruptions 
C)  Abundance of felsic pyroclastic materials in its deposits 
D)  Age of the oldest volcanic layer present

Question 10

What is the plate-tectonic setting of Mount Rainier?

Accepted Answer

A)  a hot spot related to Yellowstone 
B)  spreading along the Juan de Fuca ridge 
C)  a continent-continent collision 
D)  subduction beneath the Pacific Northwest 
E)  none of these 
A)  a hot spot related to Yellowstone 
B)  spreading along the Juan de Fuca ridge 
C)  a continent-continent collision 
D)  subduction beneath the Pacific Northwest 
E)  none of these

Question 11

If bubbles cannot escape easily from a magma, the resulting eruption is likely to:

Accepted Answer

A)  be explosive 
B)  be nonexplosive 
C)  produce long, thin lava flows 
A)  be explosive 
B)  be nonexplosive 
C)  produce long, thin lava flows

Question 12

What tectonic setting is interpreted to be the cause of volcanism at Yellowstone?

Accepted Answer

A)  subduction along the coast of the Pacific Northwest 
B)  magma that is coming up along a bend in a transform fault 
C)  movement of North America over a mantle plume 
D)  a large meteorite impact that struck the area 100 years ago 
A)  subduction along the coast of the Pacific Northwest 
B)  magma that is coming up along a bend in a transform fault 
C)  movement of North America over a mantle plume 
D)  a large meteorite impact that struck the area 100 years ago

Question 13

What type of eruption 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 14

Which of the numbered features is a pyroclastic column?

Accepted Answer

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

Question 15

Some scientists think that Yellowstone could cause a future disaster because:

Accepted Answer

A)  the area is part of a caldera 
B)  scientists think that magma is still present at depth 
C)  past eruptions from Yellowstone carried ash over a huge area of western North America 
D)  land near Yellowstone is uplifting in some places and subsiding in others 
E)  all of these 
A)  the area is part of a caldera 
B)  scientists think that magma is still present at depth 
C)  past eruptions from Yellowstone carried ash over a huge area of western North America 
D)  land near Yellowstone is uplifting in some places and subsiding in others 
E)  all of these

Question 16

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

Accepted Answer

A)  felsic and intermediate lava flows 
B)  pyroclastic rocks from an eruption column 
C)  pyroclastic rocks from pyroclastic flows 
D)  rocks with fragments formed by landslides and mudflows 
E)  all of these 
A)  felsic and intermediate lava flows 
B)  pyroclastic rocks from an eruption column 
C)  pyroclastic rocks from pyroclastic flows 
D)  rocks with fragments formed by landslides and mudflows 
E)  all of these

Question 17

Mount Pelée, a composite volcano on Martinique, destroyed the town of St. Pierre in 1902, killing about 30,000 people with:

Accepted Answer

A)  pyroclastic flows 
B)  basaltic lava flows 
C)  lahars and mudflows 
A)  pyroclastic flows 
B)  basaltic lava flows 
C)  lahars and mudflows

Question 18

At what depth do gas bubbles have the most effect on magma?

Accepted Answer

A)  when the magma first forms, before the bubbles can dissolve into the magma 
B)  at moderate depths, when the magma is moving rapidly through the conduit 
C)  at very shallow levels, such as within the volcano 
D)  none of these 
A)  when the magma first forms, before the bubbles can dissolve into the magma 
B)  at moderate depths, when the magma is moving rapidly through the conduit 
C)  at very shallow levels, such as within the volcano 
D)  none of these

Question 19

Eruptions of scoria cones are commonly associated with:

Accepted Answer

A)  basaltic lava flows 
B)  lava fountains 
C)  pyroclastic flow 
D)  viscous lava flows 
E)  basaltic lava flows and lava fountains 
A)  basaltic lava flows 
B)  lava fountains 
C)  pyroclastic flow 
D)  viscous lava flows 
E)  basaltic lava flows and lava fountains

Question 20

Which of the following is NOT a common type of volcano?

Accepted Answer

A)  mesa 
B)  shield 
C)  dome 
D)  composite cone 
A)  mesa 
B)  shield 
C)  dome 
D)  composite cone

Which represents the largest igneous eruptions on Earth?

Which of the following is NOT a major controlling factor on volcanic eruption style?

Which of the following sites has volcanism related to a hot spot or divergent margin? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a mid-ocean ridge.

Huge circular depressions from which volcanoes erupt are called:

What type of volcanic eruption is probably shown in this photograph?

This igneous rock contains flattened pieces of pumice and small crystals of quartz and feldspar. What type of rock is it?

Volcanic domes commonly are partially destroyed when:

Scoria cones are composed primarily of:

Which of the following is NOT a way in which a volcano's history indicates the level of hazard it poses to nearby population centers?

What is the plate-tectonic setting of Mount Rainier?

If bubbles cannot escape easily from a magma, the resulting eruption is likely to:

What tectonic setting is interpreted to be the cause of volcanism at Yellowstone?

What type of eruption formed the volcano in this photograph?

Which of the numbered features is a pyroclastic column?

Some scientists think that Yellowstone could cause a future disaster because:

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

Mount Pelée, a composite volcano on Martinique, destroyed the town of St. Pierre in 1902, killing about 30,000 people with:

At what depth do gas bubbles have the most effect on magma?

Eruptions of scoria cones are commonly associated with:

Which of the following is NOT a common type of volcano?

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

Exam 6: Volcanoes and Volcanic Hazards

Which represents the largest igneous eruptions on Earth?

Which of the following is NOT a major controlling factor on volcanic eruption style?

Which of the following sites has volcanism related to a hot spot or divergent margin? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a mid-ocean ridge.

Huge circular depressions from which volcanoes erupt are called:

What type of volcanic eruption is probably shown in this photograph?

This igneous rock contains flattened pieces of pumice and small crystals of quartz and feldspar. What type of rock is it?

Volcanic domes commonly are partially destroyed when:

Scoria cones are composed primarily of:

Which of the following is NOT a way in which a volcano's history indicates the level of hazard it poses to nearby population centers?

What is the plate-tectonic setting of Mount Rainier?

If bubbles cannot escape easily from a magma, the resulting eruption is likely to:

What tectonic setting is interpreted to be the cause of volcanism at Yellowstone?

What type of eruption formed the volcano in this photograph?

Which of the numbered features is a pyroclastic column?

Some scientists think that Yellowstone could cause a future disaster because:

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

Mount Pelée, a composite volcano on Martinique, destroyed the town of St. Pierre in 1902, killing about 30,000 people with:

At what depth do gas bubbles have the most effect on magma?

Eruptions of scoria cones are commonly associated with:

Which of the following is NOT a common type of volcano?

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