Question 1

A landslide or sector collapse led to the eruption of Mount St.Helens.

Accepted Answer

A) True 
 B)False

Question 2

Basic names of volcanic rocks are based on the rock's

Accepted Answer

A)  iron content. 
B)  magnesium content. 
C)  aluminum content. 
D)  silica content. 
E)  calcium content. 
A)  iron content. 
B)  magnesium content. 
C)  aluminum content. 
D)  silica content. 
E)  calcium content.

Question 3

List the main elements comprising silicate minerals in magma.

Accepted Answer

oxygen (O),silicon (Si),alumin

Question 4

How can monitoring magnetic properties of rocks help forecast a volcanic eruption?

Accepted Answer

When older volcanic rocks are heated abo

Question 5

Basaltic eruptions

Accepted Answer

A)  tend to have low viscosity. 
B)  produce stratovolcanoes. 
C)  occur at subduction zones. 
D)  are associated with strike-slip faults. 
E)  produce abundant tephra. 
A)  tend to have low viscosity. 
B)  produce stratovolcanoes. 
C)  occur at subduction zones. 
D)  are associated with strike-slip faults. 
E)  produce abundant tephra.

Question 6

Which type of volcano is most common around the Pacific Rim?

Accepted Answer

A)  shield volcano 
B)  stratovolcano 
C)  caldera 
D)  cinder cone 
E)  volcanic dome 
A)  shield volcano 
B)  stratovolcano 
C)  caldera 
D)  cinder cone 
E)  volcanic dome

Question 7

List the four main types of volcanic rocks,in order from low silica content to high silica content.

Accepted Answer

basalt,and

Question 8

The Ring of Fire includes most of the world's onshore volcanoes.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following volcanic hazards has been deadliest for people?

Accepted Answer

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

Question 10

Basaltic magma can change composition slowly over time.

Accepted Answer

A) True 
 B)False

A landslide or sector collapse led to the eruption of Mount St.Helens.

Basic names of volcanic rocks are based on the rock's

List the main elements comprising silicate minerals in magma.

How can monitoring magnetic properties of rocks help forecast a volcanic eruption?

Basaltic eruptions

Which type of volcano is most common around the Pacific Rim?

List the four main types of volcanic rocks,in order from low silica content to high silica content.

The Ring of Fire includes most of the world's onshore volcanoes.

Which of the following volcanic hazards has been deadliest for people?

Basaltic magma can change composition slowly over time.

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

Exam 5: Volcanoes and Volcanic Eruptions

A landslide or sector collapse led to the eruption of Mount St.Helens.

Basic names of volcanic rocks are based on the rock's

List the main elements comprising silicate minerals in magma.

How can monitoring magnetic properties of rocks help forecast a volcanic eruption?

Basaltic eruptions

Which type of volcano is most common around the Pacific Rim?

List the four main types of volcanic rocks,in order from low silica content to high silica content.

The Ring of Fire includes most of the world's onshore volcanoes.

Which of the following volcanic hazards has been deadliest for people?

Basaltic magma can change composition slowly over time.

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