Question 1

Match the letter on the figure with the term. 
-Pyroclastic material

Accepted Answer

The answer of Match the letter on the figure with...

Question 2

The average composition of rocks comprising a large composite cone or stratovolcano is similar to a(n) ________ magma.

Accepted Answer

A)  basaltic
B)  ultramafic
C)  andesitic
D)  rhyoliticE) A) and D)
F) None of the above

Question 3

Cinder cones ________.

Accepted Answer

A)  have very steep slopes
B)  are usually less than 300 meters (1000 feet) high
C)  consist largely of pyroclastics
D)  all of theseE) C) and D)
F) A) and B)

Question 4

Match the letter on the figure with the term. 
-Bomb

Accepted Answer

The answer of Match the letter on the figure with...

Question 5

Most granitic batholiths are generated ________.

Accepted Answer

A)  as intrusions beneath composite volcanos along convergent plate margins
B)  where spreading ridges occur beneath continents
C)  along transform faults,which accounts for their linear geographic distribution
D)  along hot spot chains beneath continents,like a welder cutting through the continent to make a linear belt of intrusive granitesE) All of the above
F) A) and B)

Question 6

Match the letter on the figure with the term. 
-Magma chamber

Accepted Answer

The answer of Match the letter on the figure with...

Question 7

Which of the following is not considered pyroclastic debris?

Accepted Answer

A)  ash
B)  cinders
C)  bombs
D)  pahoehoeE) A) and B)
F) None of the above

Question 8

The greatest danger from pyroclastic flows is ________.

Accepted Answer

A)  being incinerated by the hot gas and entrained magma.
B)  being smothered by hot gases and ash.
C)  being buried in ash.
D)  not significant because they move so slowly they can be avoided.E) A) and C)
F) A) and D)

Question 9

Pyroclastic flows move ________.

Accepted Answer

A)  very rapidly,too fast to outrun on foot
B)  as gravity flows similar to snow avalanches
C)  as a dense cloud that contains hot magma particles suspended in hot gases and moves rapidly downhill
D)  all of the above
E)  none of the aboveF) All of the above
G) A) and B)

Question 10

Which of the following is a tabular intrusive body with subparallel intrusive contacts?

Accepted Answer

A)  dike
B)  laccolith
C)  stock
D)  columnar jointsE) None of the above
F) A) and B)

Question 11

The dominant rock type erupted by submarine volcanoes at spreading ridges is andesite.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

A)  amount of dissolved gas in the magma
B)  temperature of the magma
C)  composition of the magma
D)  all of theseE) B) and C)
F) B) and D)

Question 13

Shield volcanos form from what type of magma?

Accepted Answer

A)  high viscosity aa basalt magmas
B)  low viscosity rhyolite magmas
C)  low viscosity basalt magmas
D)  high viscosity rhyolite magmasE) A) and C)
F) None of the above

Question 14

Ash and lapilli are different sized pyroclastic particles.

Accepted Answer

A) True 
 B)False

Question 15

A ________ is the largest discordant body of intrusive,igneous rock.

Accepted Answer

A)  lopolith
B)  laccolith
C)  pluton
D)  batholithE) A) and C)
F) All of the above

Question 16

Mount Pelée on Martinique is an example of a ________.

Accepted Answer

A)  shield volcano
B)  cinder cone
C)  lava dome
D)  composite volcanoE) B) and D)
F) None of the above

Question 17

Volcanic bombs originate ________.

Accepted Answer

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

Question 18

Match the name of the tectonic feature with the Figure. 
-continental rift

Accepted Answer

The answer of Match the name of the tectonic feature...

Question 19

Which of the following best describes melting of the mantle at subduction zones that leads to island arc volcanos?

Accepted Answer

A)  Heat is carried downward with the subducting plate and melts the mantle above the downgoing plate.
B)  Water released from the subducting plate decreases the melting temperature in the mantle above the downgoing plate to generate magmas from the overlying mantle wedge.
C)  The subducting plate is heated as it is carried to depth and the subducted oceanic crust melts.
D)  The subducted plate subsides into the mantle and allows magma from the lower mantle magma ocean to rise toward the surface.E) None of the above
F) A) and B)

Question 20

Which of the following is emplaced over millions of years to form a composite intrusive complex?

Accepted Answer

A)  dike
B)  sill
C)  laccolith
D)  batholithE) C) and D)
F) A) and B)

Exam 9: Volcanoes and Other Igneous Activity

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

Correct AnswerverifiedShow Answer

Which of the following best describes melting of the mantle at subduction zones that leads to island arc volcanos?

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Ash and lapilli are different sized pyroclastic particles.

Correct AnswerverifiedShow Answer

Cinder cones ________.

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Match the letter on the figure with the term. -Pyroclastic material

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Match the letter on the figure with the term. -Magma chamber

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Volcanic bombs originate ________.

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Which of the following is emplaced over millions of years to form a composite intrusive complex?

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Match the letter on the figure with the term. -Bomb

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Mount Pelée on Martinique is an example of a ________.

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Match the name of the tectonic feature with the Figure. -continental rift

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The average composition of rocks comprising a large composite cone or stratovolcano is similar to a(n) ________ magma.

Correct AnswerverifiedShow Answer

Shield volcanos form from what type of magma?

Correct AnswerverifiedShow Answer

Pyroclastic flows move ________.

Correct AnswerverifiedShow Answer

Which of the following is not considered pyroclastic debris?

Correct AnswerverifiedShow Answer

Which of the following is a tabular intrusive body with subparallel intrusive contacts?

Correct AnswerverifiedShow Answer

Most granitic batholiths are generated ________.

Correct AnswerverifiedShow Answer

The greatest danger from pyroclastic flows is ________.

Correct AnswerverifiedShow Answer

A ________ is the largest discordant body of intrusive,igneous rock.

Correct AnswerverifiedShow Answer

The dominant rock type erupted by submarine volcanoes at spreading ridges is andesite.

Correct AnswerverifiedShow Answer

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