Question 1

Which magma composition will produce the most explosive volcanoes?

Accepted Answer

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

Question 2

Which of the following is a classic example of a shield volcano?

Accepted Answer

A)  Mount Baker, Washington 
B)  Mauna Loa, Hawaii 
C)  Mount Fuji, Japan 
D)  Mount Vesuvius, Italy 
E)  Mount St. Helens, Washington 
A)  Mount Baker, Washington 
B)  Mauna Loa, Hawaii 
C)  Mount Fuji, Japan 
D)  Mount Vesuvius, Italy 
E)  Mount St. Helens, Washington

Question 3

Stratovolcanoes form at divergent plate margins.

Accepted Answer

A) True 
 B)False

Question 4

What is a large igneous province? Give a likely modern example.

Accepted Answer

A large igneous province is an extensive

Question 5

Which of the following is usually the first sign of impending eruption of a volcano?

Accepted Answer

A)  small earthquakes 
B)  increased hot spring activity 
C)  changes in gas emissions 
D)  changes in slope of the volcano 
E)  changes in magnetic properties of the volcano 
A)  small earthquakes 
B)  increased hot spring activity 
C)  changes in gas emissions 
D)  changes in slope of the volcano 
E)  changes in magnetic properties of the volcano

Question 6

The prevailing winds in Vancouver,B.C.,blow from west to east.How likely is Vancouver to be inundated with volcanic ash the next time Mt.Meager,Mt.Baker,Mt.Rainier,or Mt.St.Helens erupts?

Accepted Answer

Not very likely.The ash from a

Question 7

Give three secondary effects of volcanoes.

Accepted Answer

Lahars,debris avalan

Question 8

Shield volcanoes are largely the products of this type of eruption.

Accepted Answer

A)  explosive 
B)  dacite lavas 
C)  rhyolite lavas 
D)  basaltic magmas 
E)  andesitic melts 
A)  explosive 
B)  dacite lavas 
C)  rhyolite lavas 
D)  basaltic magmas 
E)  andesitic melts

Question 9

Large eruptions from stratovolcanoes typically affect climate by

Accepted Answer

A)  heating the atmosphere, causing global warming. 
B)  SO₂ and ash particles blocking sunlight and causing global cooling. 
C)  melting large quantities of ice causing sea level to rise. 
D)  heating ocean water with lava flows. 
E)  reducing alpine ice cover, contributing to global warming. 
A)  heating the atmosphere, causing global warming. 
B)  SO₂ and ash particles blocking sunlight and causing global cooling. 
C)  melting large quantities of ice causing sea level to rise. 
D)  heating ocean water with lava flows. 
E)  reducing alpine ice cover, contributing to global warming.

Question 10

Give three measurable phenomena that are used to predict imminent volcanic eruptions.

Accepted Answer

Increased seismic activity below the vol

Question 11

Immediately after an eruption at Kilauea in Hawaii,the surface of the volcano

Accepted Answer

A)  inflates, making the slopes of the volcano slightly steeper. 
B)  subsides, making the slopes of the volcano less steep. 
C)  shows higher tilt in the north-south direction. 
D)  shows higher tilt in the east-west direction. 
E)  cracks open in many places surrounding the summit. 
A)  inflates, making the slopes of the volcano slightly steeper. 
B)  subsides, making the slopes of the volcano less steep. 
C)  shows higher tilt in the north-south direction. 
D)  shows higher tilt in the east-west direction. 
E)  cracks open in many places surrounding the summit.

Question 12

Lahars are avalanches of hot gas,ash and volcanic rock fragments that flow down slopes during eruptions.

Accepted Answer

A) True 
 B)False

Question 13

In 1986,Lake Nyos,a crater lake in the Cameroon highlands West Africa,erupted a cloud of which gas that killed over 1700 people.

Accepted Answer

A)  chlorine 
B)  carbon monoxide 
C)  sulphur dioxide 
D)  carbon dioxide 
E)  hydrogen sulphide 
A)  chlorine 
B)  carbon monoxide 
C)  sulphur dioxide 
D)  carbon dioxide 
E)  hydrogen sulphide

Question 14

What is a pyroclastic flow,how does it form,and why is it so dangerous?

Accepted Answer

A pyroclastic flows is a dense super-hot

Question 15

Describe the three main mechanisms for the melting of silicate rocks in the mantle.

Accepted Answer

Most magmas originate from melting withi

Question 16

The eruption of Mount St.Helens was an example of a super eruption.

Accepted Answer

A) True 
 B)False

Question 17

The largest volcanoes on the planet are

Accepted Answer

A)  shield volcanoes. 
B)  volcanic domes. 
C)  composite volcanoes. 
D)  stratovolcanoes. 
E)  cinder cones. 
A)  shield volcanoes. 
B)  volcanic domes. 
C)  composite volcanoes. 
D)  stratovolcanoes. 
E)  cinder cones.

Question 18

Dacite has a higher silica content than basalt does.

Accepted Answer

A) True 
 B)False

Question 19

Sulphur dioxide from volcanoes can combine with water vapour in the atmosphere and produce acid rain.

Accepted Answer

A) True 
 B)False

Question 20

What feature is caused by the collapse of the roof of an empty magma chamber?

Accepted Answer

A)  a volcanic tube 
B)  a maar 
C)  a geyser 
D)  a caldera 
E)  hot springs 
A)  a volcanic tube 
B)  a maar 
C)  a geyser 
D)  a caldera 
E)  hot springs

Which magma composition will produce the most explosive volcanoes?

Which of the following is a classic example of a shield volcano?

Stratovolcanoes form at divergent plate margins.

What is a large igneous province? Give a likely modern example.

Which of the following is usually the first sign of impending eruption of a volcano?

The prevailing winds in Vancouver,B.C.,blow from west to east.How likely is Vancouver to be inundated with volcanic ash the next time Mt.Meager,Mt.Baker,Mt.Rainier,or Mt.St.Helens erupts?

Give three secondary effects of volcanoes.

Shield volcanoes are largely the products of this type of eruption.

Large eruptions from stratovolcanoes typically affect climate by

Give three measurable phenomena that are used to predict imminent volcanic eruptions.

Immediately after an eruption at Kilauea in Hawaii,the surface of the volcano

Lahars are avalanches of hot gas,ash and volcanic rock fragments that flow down slopes during eruptions.

In 1986,Lake Nyos,a crater lake in the Cameroon highlands West Africa,erupted a cloud of which gas that killed over 1700 people.

What is a pyroclastic flow,how does it form,and why is it so dangerous?

Describe the three main mechanisms for the melting of silicate rocks in the mantle.

The eruption of Mount St.Helens was an example of a super eruption.

The largest volcanoes on the planet are

Dacite has a higher silica content than basalt does.

Sulphur dioxide from volcanoes can combine with water vapour in the atmosphere and produce acid rain.

What feature is caused by the collapse of the roof of an empty magma chamber?

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

Which magma composition will produce the most explosive volcanoes?

Which of the following is a classic example of a shield volcano?

Stratovolcanoes form at divergent plate margins.

What is a large igneous province? Give a likely modern example.

Which of the following is usually the first sign of impending eruption of a volcano?

The prevailing winds in Vancouver,B.C.,blow from west to east.How likely is Vancouver to be inundated with volcanic ash the next time Mt.Meager,Mt.Baker,Mt.Rainier,or Mt.St.Helens erupts?

Give three secondary effects of volcanoes.

Shield volcanoes are largely the products of this type of eruption.

Large eruptions from stratovolcanoes typically affect climate by

Give three measurable phenomena that are used to predict imminent volcanic eruptions.

Immediately after an eruption at Kilauea in Hawaii,the surface of the volcano

Lahars are avalanches of hot gas,ash and volcanic rock fragments that flow down slopes during eruptions.

In 1986,Lake Nyos,a crater lake in the Cameroon highlands West Africa,erupted a cloud of which gas that killed over 1700 people.

What is a pyroclastic flow,how does it form,and why is it so dangerous?

Describe the three main mechanisms for the melting of silicate rocks in the mantle.

The eruption of Mount St.Helens was an example of a super eruption.

The largest volcanoes on the planet are

Dacite has a higher silica content than basalt does.

Sulphur dioxide from volcanoes can combine with water vapour in the atmosphere and produce acid rain.

What feature is caused by the collapse of the roof of an empty magma chamber?

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