Question 1

Composite volcanoes are both scenic and deadly.What factors contribute to this?

Accepted Answer

Composite volcanoes are built up from hi

Question 2

Discuss the role of education and experience in decreasing fatalities from volcanic hazards.

Accepted Answer

People live near volcanoes for many reas

Question 3

What is the Volcanic Explosivity Index? What factors contribute to it?

Accepted Answer

The VEI is a measure of the si

Question 4

How did the Toba caldera eruption impact human populations?

Accepted Answer

The huge amount of pyroclastic material

Question 5

All active volcanoes on land are located along the Ring of Fire.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following volcanic products is most hazardous to air traffic?

Accepted Answer

A)  pyroclastic flows 
B)  volcanic ash 
C)  lahars 
D)  volcanic bombs 
E)  lava flows 
A)  pyroclastic flows 
B)  volcanic ash 
C)  lahars 
D)  volcanic bombs 
E)  lava flows

Question 7

Why is the lava that erupts at mid-ocean ridges all basaltic,showing little variation worldwide?

Accepted Answer

Magma at mid-ocean ridges forms from ris

Question 8

Explain the process of fractionation,which produces magmas of different compositions.

Accepted Answer

As magma cools,the first minerals to cry

Question 9

Lapilli are larger than volcanic bombs.

Accepted Answer

A) True 
 B)False

Question 10

The viscosity of magma or lava is largely based on its ________ content.

Accepted Answer

A)  sodium 
B)  silica 
C)  calcium 
D)  magnesium 
E)  iron 
A)  sodium 
B)  silica 
C)  calcium 
D)  magnesium 
E)  iron

Question 11

What is the difference between a hot spring and a geyser?

Accepted Answer

Hot springs occur when groundwater is ci

Question 12

Which of the following eruptions had the highest Volcanic Explosivity Index?

Accepted Answer

A)  Mount St. Helens, 1980 
B)  Mt. Pinatubo, 1991 
C)  Kilauea, 2007 
D)  Yellowstone caldera, 600,000 years ago 
E)  Mt. Unzen, 1991 
A)  Mount St. Helens, 1980 
B)  Mt. Pinatubo, 1991 
C)  Kilauea, 2007 
D)  Yellowstone caldera, 600,000 years ago 
E)  Mt. Unzen, 1991

Question 13

The Nevado del Ruiz Volcanic disaster,which killed over 23,000 people,was due largely to this type of secondary effect.

Accepted Answer

A)  poisonous gas 
B)  landslide 
C)  fire 
D)  tsunami 
E)  lahar 
A)  poisonous gas 
B)  landslide 
C)  fire 
D)  tsunami 
E)  lahar

Question 14

Explain how a mantle hotspot is responsible for the Hawaiian islands.

Accepted Answer

The hotspot is stationary in the mantle,

Question 15

The two primary volcanic gases are

Accepted Answer

A)  hydrogen sulfide and carbon monoxide. 
B)  carbon monoxide and carbon dioxide. 
C)  chlorine gas and carbon monoxide. 
D)  carbon dioxide and water vapour. 
E)  chlorine gas and hydrogen sulfide. 
A)  hydrogen sulfide and carbon monoxide. 
B)  carbon monoxide and carbon dioxide. 
C)  chlorine gas and carbon monoxide. 
D)  carbon dioxide and water vapour. 
E)  chlorine gas and hydrogen sulfide.

Question 16

Silica-rich magmas are noted for their high viscosity,which results in slow moving lava flows and highly explosive eruptions.

Accepted Answer

A) True 
 B)False

Question 17

A group of volcanoes in central British Columbia extends from west to east,growing progressively older to the west.The youngest volcano (at the east end)is about 8 thousand years old.This age progression implies that movement of the North American Plate in this region has been to the

Accepted Answer

A)  west. 
B)  east. 
C)  northwest. 
D)  northeast. 
E)  southwest. 
A)  west. 
B)  east. 
C)  northwest. 
D)  northeast. 
E)  southwest.

Question 18

Shield volcanoes commonly erupt tephra.

Accepted Answer

A) True 
 B)False

Question 19

What process causes melting of rocks in subduction zones?

Accepted Answer

A)  decompression of the mantle 
B)  addition of heat from the subducting plate 
C)  addition of water into the mantle from the subducting slab 
D)  removal of water from the mantle 
E)  convection of the asthenosphere 
A)  decompression of the mantle 
B)  addition of heat from the subducting plate 
C)  addition of water into the mantle from the subducting slab 
D)  removal of water from the mantle 
E)  convection of the asthenosphere

Question 20

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

Accepted Answer

A)  pyroclastic flow 
B)  lahar 
C)  pyroclastic surge 
D)  poisonous gas 
E)  ash fall 
A)  pyroclastic flow 
B)  lahar 
C)  pyroclastic surge 
D)  poisonous gas 
E)  ash fall

Composite volcanoes are both scenic and deadly.What factors contribute to this?

Discuss the role of education and experience in decreasing fatalities from volcanic hazards.

What is the Volcanic Explosivity Index? What factors contribute to it?

How did the Toba caldera eruption impact human populations?

All active volcanoes on land are located along the Ring of Fire.

Which of the following volcanic products is most hazardous to air traffic?

Why is the lava that erupts at mid-ocean ridges all basaltic,showing little variation worldwide?

Explain the process of fractionation,which produces magmas of different compositions.

Lapilli are larger than volcanic bombs.

The viscosity of magma or lava is largely based on its ________ content.

What is the difference between a hot spring and a geyser?

Which of the following eruptions had the highest Volcanic Explosivity Index?

The Nevado del Ruiz Volcanic disaster,which killed over 23,000 people,was due largely to this type of secondary effect.

Explain how a mantle hotspot is responsible for the Hawaiian islands.

The two primary volcanic gases are

Silica-rich magmas are noted for their high viscosity,which results in slow moving lava flows and highly explosive eruptions.

A group of volcanoes in central British Columbia extends from west to east,growing progressively older to the west.The youngest volcano (at the east end)is about 8 thousand years old.This age progression implies that movement of the North American Plate in this region has been to the

Shield volcanoes commonly erupt tephra.

What process causes melting of rocks in subduction zones?

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

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

Composite volcanoes are both scenic and deadly.What factors contribute to this?

Discuss the role of education and experience in decreasing fatalities from volcanic hazards.

What is the Volcanic Explosivity Index? What factors contribute to it?

How did the Toba caldera eruption impact human populations?

All active volcanoes on land are located along the Ring of Fire.

Which of the following volcanic products is most hazardous to air traffic?

Why is the lava that erupts at mid-ocean ridges all basaltic,showing little variation worldwide?

Explain the process of fractionation,which produces magmas of different compositions.

Lapilli are larger than volcanic bombs.

The viscosity of magma or lava is largely based on its ________ content.

What is the difference between a hot spring and a geyser?

Which of the following eruptions had the highest Volcanic Explosivity Index?

The Nevado del Ruiz Volcanic disaster,which killed over 23,000 people,was due largely to this type of secondary effect.

Explain how a mantle hotspot is responsible for the Hawaiian islands.

The two primary volcanic gases are

Silica-rich magmas are noted for their high viscosity,which results in slow moving lava flows and highly explosive eruptions.

A group of volcanoes in central British Columbia extends from west to east,growing progressively older to the west.The youngest volcano (at the east end)is about 8 thousand years old.This age progression implies that movement of the North American Plate in this region has been to the

Shield volcanoes commonly erupt tephra.

What process causes melting of rocks in subduction zones?

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

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