Question 1

Which type of basaltic lava flow has a fairly smooth, unfragmented, ropy surface?

Accepted Answer

A)  aa
B)  scoria
C)  pahoehoe
D)  pegmatiticE) A) and C)
F) B) and C)

Question 2

Another term for a volcanic mudflow is a(n)__________.

Accepted Answer

The answer of Another term for a volcanic mudflow is...

Question 3

A relatively small, summit depression on a volcano, marking a former eruptive vent, is a(n)__________.

Accepted Answer

The answer of A relatively small, summit depression on a...

Question 4

Which type of basaltic lava flow has its surface covered with sharp- edged, angular blocks and rubble?

Accepted Answer

A)  pahoehoe
B)  pillow lava
C)  aa
D)  scoriaE) B) and C)
F) A) and D)

Question 5

________only emit gas.

Accepted Answer

A)  Calderas
B)  Parasitic cones
C)  Fumaroles
D)  CraterE) None of the above
F) B) and C)

Question 6

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)  Mudflows accompanied the major eruptive events.
D)  Plumes of ash rose high into the atmosphere during the major eruptive events.E) A) and B)
F) A) and C)

Question 7

__________denotes a basaltic lava flow covered with angular, congealed lava rubble.

Accepted Answer

The answer of __________denotes a basaltic lava flow covered with...

Question 8

________tend to increase the explosive potential of a magma body beneath a volcano.

Accepted Answer

A)  Low silica content and low viscosity
B)  High viscosity and dissolved gas
C)  Low viscosity and low dissolved gas content
D)  High viscosity and low dissolved gas contentE) A) and B)
F) A) and C)

Question 9

The (geologically) recent volcanic activity in Yellowstone National Park is .

Accepted Answer

A)  related to intraplate, hot spot volcanism
B)  related to a divergent plate boundary
C)  related to plate subduction
D)  related to a transform plate boundaryE) A) and B)
F) A) and C)

Question 10

________destroyed the city of St. Pierre, Martinique in 1902.

Accepted Answer

A)  A nueé ardente
B)  Mudflows
C)  Basaltic lava flows
D)  Heavy ashfallE) None of the above
F) A) and C)

Question 11

Which one of the following shows the correct order (left to right) of decreasing magma viscosity?

Accepted Answer

A)  rhyolite, andesite, basalt
B)  basalt, rhyolite, andesite
C)  andesite, rhyolite, basalt
D)  basalt, andesite, rhyoliteE) C) and D)
F) A) and C)

Question 12

The________ ocean basin is rimmed by the most subduction zones.

Accepted Answer

A)  Atlantic
B)  Pacific
C)  Arctic
D)  IndianE) C) and D)
F) None of the above

Question 13

Vents that emit only hot gases and vapors are called ___________.

Accepted Answer

The answer of Vents that emit only hot gases and...

Question 14

Composite volcanic cones are also known as __________.

Accepted Answer

The answer of Composite volcanic cones are also known as...

Question 15

Which basaltic lava flow has a relatively smooth surface?

Accepted Answer

pahoehoe

Question 16

Which one of the following statements is NOT true?

Accepted Answer

A)  When magma reaches the surface, its dissolved gas content increases.
B)  Basalt magmas in general have higher temperatures than rhyolite magmas.
C)  Melting temperatures of silicate rocks are lowered by small amounts of water.
D)  Melting temperatures of silicate rocks increase with increased pressure.E) A) and D)
F) All of the above

Question 17

__________is a dangerous, fast moving, hot, turbulent cloud of volcanic gases and fine- sized, pyroclastic particles.

Accepted Answer

The answer of __________is a dangerous, fast moving, hot, turbulent...

Question 18

Volcanic bombs originate ________.

Accepted Answer

A)  as laser- guided, granite blocks launched from a supersonic jet
B)  as erupted magma blobs that partly congeal before falling to the ground
C)  as ash particles that join together in the eruptive plume and fall as cobble- sized objects
D)  as blocks of volcanic rock ejected from an erupting volcanic craterE) A) and D)
F) B) and C)

Question 19

Use complete sentences, correct spelling, and the information presented in chapter 5 to answer the questions below.
-What type of volcano is shown in the diagram below?

Accepted Answer

cinder cone

Question 20

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

Accepted Answer

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

Exam 5: Volcanoes and Volcanic Hazards

Which type of basaltic lava flow has a fairly smooth, unfragmented, ropy surface?

Correct AnswerverifiedShow Answer

Another term for a volcanic mudflow is a(n)__________.

Correct AnswerverifiedShow Answer

A relatively small, summit depression on a volcano, marking a former eruptive vent, is a(n)__________.

Correct AnswerverifiedShow Answer

Which type of basaltic lava flow has its surface covered with sharp- edged, angular blocks and rubble?

Correct AnswerverifiedShow Answer

________only emit gas.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

__________denotes a basaltic lava flow covered with angular, congealed lava rubble.

Correct AnswerverifiedShow Answer

________tend to increase the explosive potential of a magma body beneath a volcano.

Correct AnswerverifiedShow Answer

The (geologically) recent volcanic activity in Yellowstone National Park is .

Correct AnswerverifiedShow Answer

________destroyed the city of St. Pierre, Martinique in 1902.

Correct AnswerverifiedShow Answer

Which one of the following shows the correct order (left to right) of decreasing magma viscosity?

Correct AnswerverifiedShow Answer

The________ ocean basin is rimmed by the most subduction zones.

Correct AnswerverifiedShow Answer

Vents that emit only hot gases and vapors are called ___________.

Correct AnswerverifiedShow Answer

Composite volcanic cones are also known as __________.

Correct AnswerverifiedShow Answer

Which basaltic lava flow has a relatively smooth surface?

Correct Answerverifiedpahoehoe

Which one of the following statements is NOT true?

Correct AnswerverifiedShow Answer

__________is a dangerous, fast moving, hot, turbulent cloud of volcanic gases and fine- sized, pyroclastic particles.

Correct AnswerverifiedShow Answer

Volcanic bombs originate ________.

Correct AnswerverifiedShow Answer

Use complete sentences, correct spelling, and the information presented in chapter 5 to answer the questions below. -What type of volcano is shown in the diagram below?

Correct Answerverifiedcinder cone

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

Correct AnswerverifiedA

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pahoehoe

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cinder cone

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A