Question 1

Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent?

Accepted Answer

A)  composition of the magma 
B)  temperature of the magma 
C)  amount of dissolved gas in the magma 
D)  all of these 
A)  composition of the magma 
B)  temperature of the magma 
C)  amount of dissolved gas in the magma 
D)  all of these

Question 2

What volcanic events formed Crater Lake, Oregon? When did they take place?

Accepted Answer

A)  Landslides and volcanic mudflows dammed the Mazama River 500 years ago. 
B)  The crater of a large, extinct cinder cone filled with water 5 million years ago. 
C)  Caldera collapse followed major ash and pyroclastic- flow eruptions 6000 years ago. 
D)  A powerful explosion blew away the top of a stratovolcano 10 million years ago. 
A)  Landslides and volcanic mudflows dammed the Mazama River 500 years ago. 
B)  The crater of a large, extinct cinder cone filled with water 5 million years ago. 
C)  Caldera collapse followed major ash and pyroclastic- flow eruptions 6000 years ago. 
D)  A powerful explosion blew away the top of a stratovolcano 10 million years ago.

Question 3

Which statement about the May, 1980, eruption of Mount St. Helens is false?

Accepted Answer

A)  The most powerful explosive event was preceded by a massive landslide. 
B)  During the eruptive period, the mountain peak was substantially built up by new lava flows and pyroclastic debris. 
C)  Plumes of ash rose high into the atmosphere during the major eruptive events. 
D)  Mudflows accompanied the major eruptive events. 
A)  The most powerful explosive event was preceded by a massive landslide. 
B)  During the eruptive period, the mountain peak was substantially built up by new lava flows and pyroclastic debris. 
C)  Plumes of ash rose high into the atmosphere during the major eruptive events. 
D)  Mudflows accompanied the major eruptive events.

Question 4

Which of the following statements best describes the big Hawaiian volcanoes?

Accepted Answer

A)  They lie directly above a transform plate boundary that cuts deeply into the mantle. 
B)  They lie along the crest of the East Pacific Rise, a mid- ocean ridge or spreading center. 
C)  They lie directly above an active subduction zone where the Pacific plate is sinking into the mantle. 
D)  They are situated in the interior of a large, Pacific plate above a hot spot deep in the mantle. 
A)  They lie directly above a transform plate boundary that cuts deeply into the mantle. 
B)  They lie along the crest of the East Pacific Rise, a mid- ocean ridge or spreading center. 
C)  They lie directly above an active subduction zone where the Pacific plate is sinking into the mantle. 
D)  They are situated in the interior of a large, Pacific plate above a hot spot deep in the mantle.

Question 5

The largest types of volcanoes are the_______ .

Accepted Answer

A)  cinder cones 
B)  composite cones 
C)  stratocones 
D)  shield volcanoes 
A)  cinder cones 
B)  composite cones 
C)  stratocones 
D)  shield volcanoes

Question 6

In 1980,_______ became the first Cascade Range volcano to erupt since Mt. Lassen in 1915- 16.

Accepted Answer

A)  Mt. Rainier 
B)  Kilauea 
C)  Mt. St. Helens 
D)  Mt. Shasta 
A)  Mt. Rainier 
B)  Kilauea 
C)  Mt. St. Helens 
D)  Mt. Shasta

Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent?

What volcanic events formed Crater Lake, Oregon? When did they take place?

Which statement about the May, 1980, eruption of Mount St. Helens is false?

Which of the following statements best describes the big Hawaiian volcanoes?

The largest types of volcanoes are the_______ .

In 1980,_______ became the first Cascade Range volcano to erupt since Mt. Lassen in 1915- 16.

Introduction to Earth Science

Matter and Minerals

Rocks: Materials of the Solid Earth

Plate Tectonics: a Scientific Revolution Unfolds

Earthquakes and Earths Interior

Crustal Deformation and Mountain Building

Weathering, Soil, and Mass Movement

Running Water and Groundwater

Glaciers, Deserts, and Wind

Geologic Time

Earths Evolution Through Geologic Time

The Ocean Floor

Ocean Water and Ocean Life

The Dynamic Ocean

The Atmosphere: Composition, Structure, and Temperature

Moisture, Clouds, and Precipitation

Air Pressure and Wind

Weather Patterns and Severe Storms

World Climates and Global Climate Change

Origins of Modern Astronomy

Touring Our Solar System

Light, Telescopes, and the Sun

Beyond Our Solar System

Filters

Exam 6: Volcanoes and Other Igneous Activity

Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent?

What volcanic events formed Crater Lake, Oregon? When did they take place?

Which statement about the May, 1980, eruption of Mount St. Helens is false?

Which of the following statements best describes the big Hawaiian volcanoes?

The largest types of volcanoes are the_______ .

In 1980,_______ became the first Cascade Range volcano to erupt since Mt. Lassen in 1915- 16.

Introduction to Earth Science

Matter and Minerals

Rocks: Materials of the Solid Earth

Plate Tectonics: a Scientific Revolution Unfolds

Earthquakes and Earths Interior

Crustal Deformation and Mountain Building

Weathering, Soil, and Mass Movement

Running Water and Groundwater

Glaciers, Deserts, and Wind

Geologic Time

Earths Evolution Through Geologic Time

The Ocean Floor

Ocean Water and Ocean Life

The Dynamic Ocean

The Atmosphere: Composition, Structure, and Temperature

Moisture, Clouds, and Precipitation

Air Pressure and Wind

Weather Patterns and Severe Storms

World Climates and Global Climate Change

Origins of Modern Astronomy

Touring Our Solar System

Light, Telescopes, and the Sun

Beyond Our Solar System

Filters