Question 1

hotspots form volcanoes only in the ocean.

Accepted Answer

A) True 
 B)False  False

Question 2

Stratovolcanoes have been responsible for most of the volcano-related deaths.

Accepted Answer

A) True 
 B)False  True

Question 3

Explain the term supervolcano.

Accepted Answer

A supervolcano is a caldera many dozens of km across,produced by very rare,but extremely violent eruptions.Toba in Indonesia and Yellowstone in North America are examples of supervolcanoes,which produce 1000X more ash than the 1980 Mount St.Helens eruption.

Question 4

Lava from stratovolcanoes typically flows much farther than lava from shield volcanoes.

Accepted Answer

A) True 
 B)False

Question 5

List the main gases emitted during volcanic eruptions.

Accepted Answer

Water vapour(H₂O),carbon dioxi

Question 6

Lava that solidifies with a smooth ropy surface is called

Accepted Answer

A)  aa. 
B)  pahoehoe. 
C)  tephra. 
D)  dacite. 
E)  pyroclastic. 
A)  aa. 
B)  pahoehoe. 
C)  tephra. 
D)  dacite. 
E)  pyroclastic.

Question 7

Compare and contrast the main types of volcanoes.How are they classified? Provide examples.

Accepted Answer

Four different types of volcanoes,classi

Question 8

Jokulhlaups are

Accepted Answer

A)  floods induced by volcanic eruptions underneath glaciers. 
B)  rubbly, slow moving lava flows in Iceland, similar to aa in Hawaii. 
C)  plants that tolerate highly acidic soils that are the first to recolonize a lava flow. 
D)  low viscosity basaltic lava flows at hotspots like Iceland. 
E)  tsunami-triggering collapses of basaltic rock off of Iceland. 
A)  floods induced by volcanic eruptions underneath glaciers. 
B)  rubbly, slow moving lava flows in Iceland, similar to aa in Hawaii. 
C)  plants that tolerate highly acidic soils that are the first to recolonize a lava flow. 
D)  low viscosity basaltic lava flows at hotspots like Iceland. 
E)  tsunami-triggering collapses of basaltic rock off of Iceland.

Question 9

Which of the following is an indirect or secondary hazard associated with a volcanic eruption?

Accepted Answer

A)  ash fall 
B)  pyroclastic flow 
C)  lahar 
D)  lateral blast 
E)  poisonous gases 
A)  ash fall 
B)  pyroclastic flow 
C)  lahar 
D)  lateral blast 
E)  poisonous gases

Question 10

Dacitic and andesitic eruptions

Accepted Answer

A)  are commonly explosive. 
B)  build shield volcanoes. 
C)  erupt frequently and quietly. 
D)  have low gas contents. 
E)  produce little tephra. 
A)  are commonly explosive. 
B)  build shield volcanoes. 
C)  erupt frequently and quietly. 
D)  have low gas contents. 
E)  produce little tephra.

Question 11

Some suburbs of Seattle,Washington are built on ancient mudflow deposits from Mt.Rainier.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is a secondary effect of a volcanic eruption?

Accepted Answer

A)  pyroclastic flows 
B)  ash falls 
C)  lava flows 
D)  poisonous gas emissions 
E)  lahars 
A)  pyroclastic flows 
B)  ash falls 
C)  lava flows 
D)  poisonous gas emissions 
E)  lahars

Question 13

Magmas with high silica content tend to have lower temperatures.

Accepted Answer

A) True 
 B)False

Question 14

What kind of magma is dominantly produced at spreading ridges?

Accepted Answer

A)  rhyolite 
B)  basalt 
C)  dacite 
D)  andesite 
E)  tephra 
A)  rhyolite 
B)  basalt 
C)  dacite 
D)  andesite 
E)  tephra

Question 15

Which of the following is the most common volcanic rock on Earth?

Accepted Answer

A)  basalt 
B)  andesite 
C)  dacite 
D)  rhyolite 
E)  granite 
A)  basalt 
B)  andesite 
C)  dacite 
D)  rhyolite 
E)  granite

Question 16

Volcanoes occur on all seven continents as well as the ocean floor.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following is probably the most common secondary effect of volcanic eruptions?

Accepted Answer

A)  tsunami 
B)  landslides 
C)  forest fires 
D)  flooding 
E)  climatic change 
A)  tsunami 
B)  landslides 
C)  forest fires 
D)  flooding 
E)  climatic change

Question 18

What changes in volcanic gas composition could indicate an imminent eruption?

Accepted Answer

An increase in the a

Question 19

Calderas produce flood basalts.

Accepted Answer

A) True 
 B)False

Question 20

What is the composition of volcanic material erupted from cinder cones?

Accepted Answer

A)  basalt 
B)  andesite 
C)  dacite 
D)  rhyolite 
E)  granite 
A)  basalt 
B)  andesite 
C)  dacite 
D)  rhyolite 
E)  granite

hotspots form volcanoes only in the ocean.

Stratovolcanoes have been responsible for most of the volcano-related deaths.

Explain the term supervolcano.

Lava from stratovolcanoes typically flows much farther than lava from shield volcanoes.

List the main gases emitted during volcanic eruptions.

Lava that solidifies with a smooth ropy surface is called

Compare and contrast the main types of volcanoes.How are they classified? Provide examples.

Jokulhlaups are

Which of the following is an indirect or secondary hazard associated with a volcanic eruption?

Dacitic and andesitic eruptions

Some suburbs of Seattle,Washington are built on ancient mudflow deposits from Mt.Rainier.

Which of the following is a secondary effect of a volcanic eruption?

Magmas with high silica content tend to have lower temperatures.

What kind of magma is dominantly produced at spreading ridges?

Which of the following is the most common volcanic rock on Earth?

Volcanoes occur on all seven continents as well as the ocean floor.

Which of the following is probably the most common secondary effect of volcanic eruptions?

What changes in volcanic gas composition could indicate an imminent eruption?

Calderas produce flood basalts.

What is the composition of volcanic material erupted from cinder cones?

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Earthquakes

Tsunamis

Landslides

Snow Avalanches

Subsidence and Soil Expansion and Contraction

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

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Exam 5: Volcanoes and Volcanic Eruptions

hotspots form volcanoes only in the ocean.

Stratovolcanoes have been responsible for most of the volcano-related deaths.

Explain the term supervolcano.

Lava from stratovolcanoes typically flows much farther than lava from shield volcanoes.

List the main gases emitted during volcanic eruptions.

Lava that solidifies with a smooth ropy surface is called

Compare and contrast the main types of volcanoes.How are they classified? Provide examples.

Jokulhlaups are

Which of the following is an indirect or secondary hazard associated with a volcanic eruption?

Dacitic and andesitic eruptions

Some suburbs of Seattle,Washington are built on ancient mudflow deposits from Mt.Rainier.

Which of the following is a secondary effect of a volcanic eruption?

Magmas with high silica content tend to have lower temperatures.

What kind of magma is dominantly produced at spreading ridges?

Which of the following is the most common volcanic rock on Earth?

Volcanoes occur on all seven continents as well as the ocean floor.

Which of the following is probably the most common secondary effect of volcanic eruptions?

What changes in volcanic gas composition could indicate an imminent eruption?

Calderas produce flood basalts.

What is the composition of volcanic material erupted from cinder cones?

Introduction to Natural Hazards

Internal Structure of Earth and Plate Tectonics

Earthquakes

Tsunamis

Landslides

Snow Avalanches

Subsidence and Soil Expansion and Contraction

River Flooding

Atmosphere and Severe Weather

Hurricanes and Extratropical Cyclones

Waves, Currents, and Coastlines

Wildfires

Climate Change

Meteorite Impacts and Extinctions

Filters