Question 1

What sort of volcano was formed during the Laki eruption in Iceland in 1783?

Accepted Answer

A)  stratovolcano
B)  under-water volcano
C)  fissure
D)  shield volcanoE) C) and D)
F) A) and D)

Question 2

An eruption of lava that pours out of vertical cracks along the flank of a volcano is referred to as a

Accepted Answer

A)  central eruption.
B)  phreatic eruption.
C)  lateral eruption.
D)  fissure eruption.E) A) and B)
F) A) and C)

Question 3

Large igneous provinces (LIPs) produce

Accepted Answer

A)  large volumes of felsic extrusive rock.
B)  large volumes of volcanic tuffs and breccias.
C)  large volumes of mafic and intermediate extrusive rock.
D)  large volumes of mafic extrusive and intrusive rocks.E) C) and D)
F) A) and B)

Question 4

So called Large Igneous Provinces are thought be the result of ________ volcanism?

Accepted Answer

A)  divergent boundary
B)  convergent boundary
C)  transform boundary
D)  intra-plate superplumeE) B) and C)
F) A) and D)

Question 5

Which of the following volcanic deposits is most likely to form from a mafic lava?

Accepted Answer

A)  flood basalt
B)  pahoehoe
C)  shield volcano
D)  all of the aboveE) A) and B)
F) A) and C)

Question 6

How can volcanic eruptions endanger commercial air traffic?

Accepted Answer

A)  Airplanes can get struck by large volcanic bombs.
B)  Volcanic ash lofted into the air can damage engines.
C)  Large plumes of volcanic gas can cause an airplane to lose lift.
D)  Clouds of volcanic ash can reduce visibility.E) A) and B)
F) B) and D)

Question 7

How long does it take to recycle the entire volume of the ocean through the mid-ocean ridges?

Accepted Answer

A)  10 days
B)  10 years
C)  10 million years
D)  10 billion yearsE) All of the above
F) B) and D)

Question 8

Kimperlite pipes contain material that may have come from mantle as deep as

Accepted Answer

A)  100 km.
B)  200 km.
C)  1000 km.
D)  3000 km.E) A) and D)
F) A) and C)

Question 9

Where are aseismic ridges located?

Accepted Answer

A)  convergent plate boundaries
B)  transform plate boundaries
C)  divergent plate boundaries
D)  intraplate regionsE) C) and D)
F) None of the above

Question 10

Shiprock,New Mexico,is an example of a

Accepted Answer

A)  caldera.
B)  cinder cone.
C)  diatreme.
D)  lava flow.E) B) and C)
F) A) and B)

Question 11

Approximately how many active volcanoes are there on Earth?

Accepted Answer

A)  50
B)  500
C)  5000
D)  50,000E) None of the above
F) A) and D)

Question 12

Which of the following rocks is formed from volcanic ash?

Accepted Answer

A)  aa
B)  breccia
C)  pahoehoe
D)  tuffE) A) and D)
F) B) and D)

Question 13

Roughly ______ people live in areas adjacent to active volcanoes.

Accepted Answer

A)  100,000
B)  10 million
C)  600 million
D)  2 billionE) A) and D)
F) A) and C)

Question 14

Approximately how much basaltic lava is erupted each year at mid-ocean ridges?

Accepted Answer

A)  3 cubic kilometers
B)  300 cubic kilometers
C)  30 cubic kilometers
D)  3000 cubic kilometersE) A) and B)
F) A) and C)

Question 15

Which of the following volcanoes is a composite volcano (stratovolcano) ?

Accepted Answer

A)  Mauna Loa,Hawaii
B)  Shiprock,New Mexico
C)  Mount Rainier,Washington
D)  Yellowstone,WyomingE) A) and D)
F) All of the above

Question 16

Which of the following states has the most active volcanoes?

Accepted Answer

A)  Alaska
B)  Florida
C)  New York
D)  TexasE) C) and D)
F) A) and B)

Question 17

Which of the following volcanic gases emitted during the 1992 eruption of Mount Pinatubo increased the rate of ozone loss in the atmosphere?

Accepted Answer

A)  carbon dioxide
B)  chlorine
C)  sulfur dioxide
D)  water vaporE) A) and B)
F) All of the above

Question 18

Most of the world's active volcanoes are located around the edge of which ocean?

Accepted Answer

A)  the Arctic Ocean
B)  the Atlantic Ocean
C)  the Indian Ocean
D)  the Pacific OceanE) All of the above
F) C) and D)

Question 19

Find the correct volcano/volcanic product match.

Accepted Answer

A)  dome/basalt
B)  shield volcano/rhyolite
C)  fissure/basalt
D)  shield volcano/andesiteE) A) and B)
F) A) and C)

Question 20

Which of the following lavas will flow downhill slowest?

Accepted Answer

A)  andesite
B)  basalt
C)  rhyolite
D)  Andesite,basalt,and rhyolite lavas all flow at approximately the same speed.E) B) and C)
F) None of the above

Exam 12: Volcanoes

Approximately how many active volcanoes are there on Earth?

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Which of the following volcanoes is a composite volcano (stratovolcano) ?

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What sort of volcano was formed during the Laki eruption in Iceland in 1783?

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Which of the following volcanic gases emitted during the 1992 eruption of Mount Pinatubo increased the rate of ozone loss in the atmosphere?

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Most of the world's active volcanoes are located around the edge of which ocean?

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Large igneous provinces (LIPs) produce

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How long does it take to recycle the entire volume of the ocean through the mid-ocean ridges?

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An eruption of lava that pours out of vertical cracks along the flank of a volcano is referred to as a

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Shiprock,New Mexico,is an example of a

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Find the correct volcano/volcanic product match.

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Which of the following lavas will flow downhill slowest?

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Approximately how much basaltic lava is erupted each year at mid-ocean ridges?

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Which of the following states has the most active volcanoes?

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Which of the following rocks is formed from volcanic ash?

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Kimperlite pipes contain material that may have come from mantle as deep as

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How can volcanic eruptions endanger commercial air traffic?

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Which of the following volcanic deposits is most likely to form from a mafic lava?

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Where are aseismic ridges located?

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So called Large Igneous Provinces are thought be the result of ________ volcanism?

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Roughly ______ people live in areas adjacent to active volcanoes.

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