Question 1

Gases that are abundantly emitted by volcanoes include ____________.

Accepted Answer

A)   water vapor, carbon dioxide, and sulfur dioxide
B)   oxygen, ozone, and water vapor
C)   oxygen, hydrogen, and neon
D)   carbon dioxide, carbon monoxide, and oxygen

Question 2

Olympus Mons,the largest known volcano in the Universe,is an example of a ____________.

Accepted Answer

A)   stratovolcano
B)   cinder cone
C)   shield volcano

Question 3

Hot-spot volcanoes ____________.

Accepted Answer

A)   can arise from the ocean floor
B)   can arise on continents
C)   may arise in the interior of lithospheric plates
D)   all of the above

Question 4

Which national park is home to a large volcanic caldera formed through a very large explosive eruption 630,000 years ago?

Accepted Answer

A)   Acadia
B)   Carlsbad Caverns
C)   Great Smoky Mountains
D)   Yellowstone

Question 5

Pillow lavas are associated with ____________.

Accepted Answer

A)   continental rhyolitic eruptions
B)   continental basaltic eruptions
C)   submarine rhyolitic eruptions
D)   submarine basaltic eruptions D

Question 6

Mt.St.Helens killed a geologist studying the volcano because ____________.

Accepted Answer

A)   the geologist disregarded orders to keep a safe distance from the vent
B)   the eruption produced a greater volume of ash than anyone predicted
C)   a landslide produced a lateral blast of volcaniclastic debris that no one anticipated
D)   lahars swept down all sides of the volcano and buried all towns within 100 km

Question 7

What was unusual about the 1986 disaster around Lake Nyos in Cameroon? A A volcanic eruption involved a lateral blast of volcaniclastic debris that no one anticipated.

Accepted Answer

A)   Pyroclastic flows buried surrounding villages, reminiscent of the burial of Pompeii 1900 years earlier.
B)   Volcanically derived carbon dioxide gas bubbled from the lake and suffocated people and animals nearby.
C)   A slurry of lava and lake water flowed rapidly outward from the lake and buried surrounding villages.

Question 8

Nonviolent eruptions characterized by extensive flows of basaltic lava are termed ____________.

Accepted Answer

A)   pyroclastic
B)   effusive
C)   explosive B

Question 9

The difference between tephra and tuff is that ____________.

Accepted Answer

A)   tephra is created in ash falls, whereas tuff is created in pyroclastic flows
B)   tephra is unlithified, whereas tuff is lithified
C)   tephra is always silicic, whereas tuff is always basaltic
D)   all of the above

Question 10

Of the three primary forms of subaerial volcanoes,____________ consist of a simple,conical pile of tephra.

Accepted Answer

A)   stratovolcanoes
B)   cinder cones
C)   shield volcanoes

Question 11

Basaltic lavas ____________.

Accepted Answer

A)   contain more iron and magnesium than rhyolitic lavas
B)   contain more silica than rhyolitic lavas
C)   are more viscous than rhyolitic lavas
D)   contain a greater proportion of trapped volatiles than rhyolitic lavas A

Question 12

Mt.Fuji in Japan is an example of a ____________.

Accepted Answer

A)   stratovolcano
B)   cinder cone
C)   shield volcano

Question 13

Rhyolitic lavas ____________.

Accepted Answer

A)   do not flow as far from the vent as basaltic lavas do
B)   cool much more slowly than basaltic lavas do
C)   are associated with volcanoes that almost never emit pyroclastic debris
D)   all of the above

Question 14

Of the three primary forms of subaerial volcanoes,____________ consist of alternating layers of tephra and solidified lava.

Accepted Answer

A)   stratovolcanoes
B)   cinder cones
C)   shield volcanoes

Question 15

The greatest hazard to human life associated with volcanoes is ____________.

Accepted Answer

A)   flowing lava
B)   volcanic gas
C)   falling ash
D)   pyroclastic flows

Question 16

Of the three primary forms of subaerial volcanoes,____________ are the largest in area.

Accepted Answer

A)   stratovolcanoes
B)   cinder cones
C)   shield volcanoes

Question 17

In 1902,a famous,deadly volcaniclastic flow killed thousands of people on the Caribbean island of ____________.

Accepted Answer

A)   Puerto Rico
B)   Martinique
C)   Aruba
D)   Jamaica

Question 18

Of the three primary forms of subaerial volcanoes,____________ have the most gently sloping sides,due to the low viscosity of the basaltic lavas which form them.

Accepted Answer

A)   stratovolcanoes
B)   cinder cones
C)   shield volcanoes

Question 19

The lithification of material from a pyroclastic flow forms a rock called ___________.

Accepted Answer

A)   metabasalt
B)   ignimbrite
C)   migmatite
D)   tuff

Question 20

Hawaiian-style effusive eruptions are a greater threat to property than to human life.

Accepted Answer

A) True 
 B)False

Exam 5: The Wrath of Vulcan: Volcanic Eruptions

Gases that are abundantly emitted by volcanoes include ____________.

Correct AnswerverifiedShow Answer

Olympus Mons,the largest known volcano in the Universe,is an example of a ____________.

Correct AnswerverifiedShow Answer

Hot-spot volcanoes ____________.

Correct AnswerverifiedShow Answer

Which national park is home to a large volcanic caldera formed through a very large explosive eruption 630,000 years ago?

Correct AnswerverifiedShow Answer

Pillow lavas are associated with ____________.

Correct AnswerverifiedD

Mt.St.Helens killed a geologist studying the volcano because ____________.

Correct AnswerverifiedShow Answer

What was unusual about the 1986 disaster around Lake Nyos in Cameroon? A A volcanic eruption involved a lateral blast of volcaniclastic debris that no one anticipated.

Correct AnswerverifiedShow Answer

Nonviolent eruptions characterized by extensive flows of basaltic lava are termed ____________.

Correct AnswerverifiedB

The difference between tephra and tuff is that ____________.

Correct AnswerverifiedShow Answer

Of the three primary forms of subaerial volcanoes,____________ consist of a simple,conical pile of tephra.

Correct AnswerverifiedShow Answer

Basaltic lavas ____________.

Correct AnswerverifiedA

Mt.Fuji in Japan is an example of a ____________.

Correct AnswerverifiedShow Answer

Rhyolitic lavas ____________.

Correct AnswerverifiedShow Answer

Of the three primary forms of subaerial volcanoes,____________ consist of alternating layers of tephra and solidified lava.

Correct AnswerverifiedShow Answer

The greatest hazard to human life associated with volcanoes is ____________.

Correct AnswerverifiedShow Answer

Of the three primary forms of subaerial volcanoes,____________ are the largest in area.

Correct AnswerverifiedShow Answer

In 1902,a famous,deadly volcaniclastic flow killed thousands of people on the Caribbean island of ____________.

Correct AnswerverifiedShow Answer

Of the three primary forms of subaerial volcanoes,____________ have the most gently sloping sides,due to the low viscosity of the basaltic lavas which form them.

Correct AnswerverifiedShow Answer

The lithification of material from a pyroclastic flow forms a rock called ___________.

Correct AnswerverifiedShow Answer

Hawaiian-style effusive eruptions are a greater threat to property than to human life.

Correct AnswerverifiedShow Answer

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