Question 1

Of the diagrams pictured above, which one represents a hot spot setting? How is such a setting evidence for plat tectonic theory, and name one location where such a setting can be found.

Accepted Answer

Students should identify letter D as the...

Question 2

Volcanoes have_______ impact on weather and climate.

Accepted Answer

A)   some definite
B)   no significant
C)   major, extinction- causingD) A) and C)
E) All of the above

Question 3

The slopes of most cinder cones are usually about 30 degrees because _______ .

Accepted Answer

A)   cinder cones are mostly basalt and basalt is too weak to maintain a slope greater than 30 degrees
B)   the loose materials ejected from the cone form slopes at that angle of repose
C)   they are composites of loose material and lava and the viscosity of the lava requires the slopes to form at about 30 degrees
D)   The statement is false; most cinder cones have slopes less than 10 degrees because of the low viscosity of basalt lava flows.E) B) and C)
F) A) and D)

Question 4

A _______is the largest discordant body of intrusive, igneous rock.

Accepted Answer

A)   laccolith
B)   batholith
C)   pluton
D)   lopolithE) C) and D)
F) All of the above

Question 5

The main destruction from shield volcanoes like Kilauea in Hawaii is _______.

Accepted Answer

A)   explosive volcanic activity
B)   a combination of both explosive and slow processes
C)   slow burial of man- made featuresD) A) and B)
E) B) and C)

Question 6

Mount Pelée on Martinique is an example of a _______ .

Accepted Answer

A)   cinder cone
B)   composite volcano
C)   shield volcano
D)   lava domeE) All of the above
F) A) and B)

Question 7

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

Accepted Answer

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

Question 8

The largest percentage of total magma production on earth occurs at what plate tectonic setting?

Accepted Answer

A)   transform plate margins
B)   spreading ridges
C)   convergent plate margins
D)   hot spots like HawaiiE) A) and B)
F) A) and C)

Question 9

not solid rock? A)  The inside of the lava tube was granite, but granite is not resistant to weathering, so has long since eroded away. B)  There are no natural openings within a lava flow. This must be a manmade feature. C)  When lava cools it contracts, leaving large gaps in the middle. D)  Lava on the inside of the tube often remains molten while the outside crystallizes. Sometimes that molten lava flows out, leaving an empty interior. " class="answers-bank-image d-inline" rel="preload" > Observe the image of the individual walking through the lava tube. Why is it hollow there and not solid rock?

Accepted Answer

A)   The inside of the lava tube was granite, but granite is not resistant to weathering, so has long since eroded away.
B)   There are no natural openings within a lava flow. This must be a manmade feature.
C)   When lava cools it contracts, leaving large gaps in the middle.
D)   Lava on the inside of the tube often remains molten while the outside crystallizes. Sometimes that molten lava flows out, leaving an empty interior.E) A) and B)
F) A) and C)

Question 10

The composition of a composite cone or stratovolcano makes its viscosity_______ .

Accepted Answer

A)   high, resulting in low volatility
B)   low, resulting in low volatility
C)   intermediate, resulting in high volatility
D)   high, resulting in high volatilityE) B) and D)
F) B) and C)

Question 11

Most of the active volcanoes on land are located in a belt known as the _______.

Accepted Answer

A)   Mid- Pacific Ridge
B)   Red Sea rift
C)   Ring of Fire
D)   Gulf Coast zoneE) A) and D)
F) C) and D)

Question 12

A _ _ is an intrusive, igneous rock body that is tabular and concordant.

Accepted Answer

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

Question 13

Volcanic activity in Yellowstone National Park is related to_______ .

Accepted Answer

A)   intraplate, hot spot volcanism
B)   a divergent plate boundary
C)   a transform plate boundary
D)   plate subductionE) A) and D)
F) B) and D)

Question 14

Considering your knowledge of volcano types in different tectonic settings, if you had to live on a volcano, which of the following would you choose if safety was your only concern?

Accepted Answer

A)   Mt Fujiyama in the Japanese island arc
B)   Mt. Spurr in the Aleutian volcanic arc
C)   Mt. Rainier in the Cascades just north of Mt. St. Helens
D)   Mauna Loa in Hawaii, on the Big Island of Hawaii near KilaueaE) All of the above
F) A) and B)

Question 15

As magma approaches the surface, water contributes to the explosive potential of the eruption because _______ .

Accepted Answer

A)   water has a lower density in its solid phase than its liquid phase which makes it explode when pressure decreases
B)   water dissolved in magma flashes to steam as pressure decreases, and the volume increase leads to an explosive potential
C)   water dissociates to hydrogen and oxygen at high temperatures but reacts violently at decreasing pressures to produce explosive eruptions
D)   water has a large heat capacity, which allow it to keep the magma hot enough to explodeE) B) and D)
F) All of the above

Question 16

not the actual bodies, as those were vaporized by the heat, but Plaster of Paris casts of individuals affected by the reaction, with casts made in the areas where the bodies were. How could this discovery help local residents to plan for the future? A)  Volcanoes never happen again in the same location, so it is an indicator that this area is now safe. B)  There may be written records buried with the bodies that could be of use. C)  The reason that the people did not survive was because they were lying down on the ground, so this can teach future residents to stand up when a pyroclastic flow comes. D)  The bodies indicate how rapidly the pyroclastic flows came, and this could be an indication of what could happen in the future. " class="answers-bank-image d-inline" rel="preload" > Note in the above image there are bodies buried by the pyroclastic flows from Mt. Vesuvius in 79 AD. These are not the actual bodies, as those were vaporized by the heat, but Plaster of Paris casts of individuals affected by the reaction, with casts made in the areas where the bodies were. How could this discovery help local residents to plan for the future?

Accepted Answer

A)   Volcanoes never happen again in the same location, so it is an indicator that this area is now safe.
B)   There may be written records buried with the bodies that could be of use.
C)   The reason that the people did not survive was because they were lying down on the ground, so this can teach future residents to stand up when a pyroclastic flow comes.
D)   The bodies indicate how rapidly the pyroclastic flows came, and this could be an indication of what could happen in the future.E) C) and D)
F) B) and C)

Question 17

_______people have been killed by pyroclastic flows erupted from cinder cones.

Accepted Answer

A)   Relatively few
B)   Thousands ofC) A) and B)
D) undefined

Question 18

When you open a bottle of soda slowly it tends not to spill, whereas if you open it too rapidly, you may get a wet hand. What parallel is there with effusive versus explosive eruptions?

Accepted Answer

A)   Effusive eruptions are like the slowly opened bottle. The air in such eruptions is released so it cannot build up in the magma, thus keeping the eruption non- violent.
B)   Explosive eruptions are like the rapidly opened bottle. Because the gases in the magma are released all at once, the eruption is not violent.
C)   Effusive eruptions are like the rapidly opened bottle. Because the gases in the magma are released all at once, the eruption is not violent.
D)   Explosive eruptions are like the slowly opened bottle. The air in such eruptions is released so it cannot build up in the magma, thus keeping the eruption non- violent.E) A) and D)
F) None of the above

Question 19

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

Accepted Answer

A)   The subducted plate subsides into the mantle and allows magma from the lower mantle magma ocean to rise toward the surface.
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 cooled as it is carried to depth and the subducted oceanic crust melts.
D)   Heat is carried downward with the subducting plate and melts the mantle above the downgoing plate.E) B) and C)
F) A) and D)

Question 20

Match the letter on the figure with the term.
 
-Identify what letter D represents in the diagram.

Accepted Answer

A)   bomb
B)   lava flow
C)   magma chamber
D)   vent
E)   pyroclastic materialF) C) and E)
G) B) and E)

Exam 6: Volcanoes and Other Igneous Activity

When you open a bottle of soda slowly it tends not to spill, whereas if you open it too rapidly, you may get a wet hand. What parallel is there with effusive versus explosive eruptions?

Correct Answer
verified

Of the diagrams pictured above, which one represents a hot spot setting? How is such a setting evidence for plat tectonic theory, and name one location where such a setting can be found.

Correct Answer
verified
Students should identify letter D as the...
View Answer

A _______is the largest discordant body of intrusive, igneous rock.

Correct Answer
verified

Observe the image of the individual walking through the lava tube. Why is it hollow there and not solid rock?

Correct Answer
verified

The slopes of most cinder cones are usually about 30 degrees because _______ .

Correct Answer
verified

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

Correct Answer
verified

The composition of a composite cone or stratovolcano makes its viscosity_______ .

Correct Answer
verified

Correct Answer
verified

The main destruction from shield volcanoes like Kilauea in Hawaii is _______.

Correct Answer
verified

Mount Pelée on Martinique is an example of a _______ .

Correct Answer
verified

A _ _ is an intrusive, igneous rock body that is tabular and concordant.

Correct Answer
verified

The largest percentage of total magma production on earth occurs at what plate tectonic setting?

Correct Answer
verified

_______people have been killed by pyroclastic flows erupted from cinder cones.

Correct Answer
verified

Match the letter on the figure with the term. -Identify what letter D represents in the diagram.

Correct Answer
verified

As magma approaches the surface, water contributes to the explosive potential of the eruption because _______ .

Correct Answer
verified

Considering your knowledge of volcano types in different tectonic settings, if you had to live on a volcano, which of the following would you choose if safety was your only concern?

Correct Answer
verified

Volcanic activity in Yellowstone National Park is related to_______ .

Correct Answer
verified

Most of the active volcanoes on land are located in a belt known as the _______.

Correct Answer
verified

Volcanoes have_______ impact on weather and climate.

Correct Answer
verified

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

Correct Answer
verified

Exam 6: Volcanoes and Other Igneous Activity

When you open a bottle of soda slowly it tends not to spill, whereas if you open it too rapidly, you may get a wet hand. What parallel is there with effusive versus explosive eruptions?

Correct AnswerverifiedShow Answer

Of the diagrams pictured above, which one represents a hot spot setting? How is such a setting evidence for plat tectonic theory, and name one location where such a setting can be found.

Correct AnswerverifiedStudents should identify letter D as the...View AnswerShow Answer

A _______is the largest discordant body of intrusive, igneous rock.

Correct AnswerverifiedShow Answer

Observe the image of the individual walking through the lava tube. Why is it hollow there and not solid rock?

Correct AnswerverifiedShow Answer

The slopes of most cinder cones are usually about 30 degrees because _______ .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The composition of a composite cone or stratovolcano makes its viscosity_______ .

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The main destruction from shield volcanoes like Kilauea in Hawaii is _______.

Correct AnswerverifiedShow Answer

Mount Pelée on Martinique is an example of a _______ .

Correct AnswerverifiedShow Answer

A _ _ is an intrusive, igneous rock body that is tabular and concordant.

Correct AnswerverifiedShow Answer

The largest percentage of total magma production on earth occurs at what plate tectonic setting?

Correct AnswerverifiedShow Answer

_______people have been killed by pyroclastic flows erupted from cinder cones.

Correct AnswerverifiedShow Answer

Match the letter on the figure with the term. -Identify what letter D represents in the diagram.

Correct AnswerverifiedShow Answer

As magma approaches the surface, water contributes to the explosive potential of the eruption because _______ .

Correct AnswerverifiedShow Answer

Considering your knowledge of volcano types in different tectonic settings, if you had to live on a volcano, which of the following would you choose if safety was your only concern?

Correct AnswerverifiedShow Answer

Volcanic activity in Yellowstone National Park is related to_______ .

Correct AnswerverifiedShow Answer

Most of the active volcanoes on land are located in a belt known as the _______.

Correct AnswerverifiedShow Answer

Volcanoes have_______ impact on weather and climate.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
Students should identify letter D as the...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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