Question 1

What ideas brought a renewed interest to the idea of continental drift?

Accepted Answer

A)   data that a submarine mountain occurred beneath the middle of the Atlantic Ocean
B)   evidence that the entire Earth was once frozen
C)   evidence that similar meteorites fall on different continents
D)   evidence that a large meteorite caused extinction of the dinosaursE) None of the above
F) B) and C)

Question 2

At mid-ocean ridges, as two plates diverge:

Accepted Answer

A)   solid mantle in the asthenosphere rises toward the surface and begins to melt due to decompression
B)   solid mantle in the asthenosphere rises toward the surface and begins to melt due to the addition of heat
C)   liquid mantle in the asthenosphere rises toward the surfaceD) A) and B)
E) None of the above

Question 3

Which areas)  on this world map are likely to be near a plate boundary?

Accepted Answer

A)   A and B
B)   A and D
C)   B and D
D)   C and D
E)   A, B, and C onlyF) None of the above
G) A) and C)

Question 4

On this map of South America, which features are NOT on a plate boundary?

Accepted Answer

A)   A and B
B)   B and C
C)   C and D
D)   D and E
E)   all of the features are on a plate boundaryF) A) and B)
G) B) and E)

Question 5

A continent has an oceanic trench offshore of its coast. Which of the following is probably NOT present along this side of the continent?

Accepted Answer

A)   a mountain belt
B)   earthquakes
C)   volcanoes
D)   melting along a mid-ocean ridge
E)   subduction of an oceanic plateF) B) and D)
G) D) and E)

Question 6

If a magnetic stripe is 120 km wide and formed over 4 m.y., what would the rate of seafloor spreading be?

Accepted Answer

A)   30 km/m.y.
B)   116 km/m.y.
C)   .03 km/m.y.D) A) and C)
E) B) and C)

Question 7

Mid-ocean ridges form where two ocean plates:

Accepted Answer

A)   collide
B)   diverge
C)   subduct
D)   slide past each other
E)   are destroyedF) A) and D)
G) A) and B)

Question 8

A convergent plate boundary is most likely associated with an) :

Accepted Answer

A)   oceanic trench
B)   a linear chain of island
C)   mid-ocean ridge
D)   transform fault
E)   none of theseF) A) and E)
G) C) and D)

Question 9

How is magma created in a subduction zone?

Accepted Answer

A)   Friction between the two plates causes the lithosphere to melt.
B)   Subduction brings one plate to a depth hot enough for minerals in the plate to melt.
C)   Subduction brings one plate to a depth hot enough for minerals to release water; this water causes melting in the overlying asthenosphere.D) B) and C)
E) All of the above

Question 10

This figure shows plate boundaries south of Alaska. Which location is along a convergent boundary?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   2 and 3F) B) and D)
G) All of the above

Question 11

Which feature on this figure is formed by bending of the subducted plate?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   EF) A) and E)
G) A) and B)

Question 12

Mid-ocean ridges are elevated above the seafloor. The elevation of the seafloor:

Accepted Answer

A)   decreases away from the mid-ocean ridge because of the cooling and contraction of the rocks
B)   increases away from the mid-ocean ridge because of the expansion of the rocks
C)   decreases away from the mid-ocean ridge because of the expansion of the rocks
D)   increases away from the mid-ocean ridge because of the cooling and contraction of the rocksE) C) and D)
F) None of the above

Question 13

On this map, identify which letter is over the Atlantic ocean.

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   feature is not labeledF) A) and E)
G) A) and D)

Question 14

The process of one plate sliding beneath another plate is called:

Accepted Answer

A)   subduction
B)   conduction
C)   transformation
D)   convergence
E)   divergenceF) A) and E)
G) A) and C)

Question 15

How many times did the Earth's magnetic field switch from north to south in the last 10 million years?

Accepted Answer

A)   many - more than 20 times
B)   seldom - less than 5 times
C)   neverD) A) and C)
E) A) and B)

Question 16

An oceanic transform plate boundary is most likely associated with an) :

Accepted Answer

A)   oceanic trench
B)   mountain belt or island arc
C)   mid-ocean ridge
D)   all of theseE) A) and D)
F) C) and D)

Question 17

Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle.

Accepted Answer

A)   Likely
B)   UnlikelyC) A) and B)
D) undefined

Question 18

Enormous mountain belts and high plateaus can be formed when two continental plates collide and:

Accepted Answer

A)   neither is subducted
B)   both diverge from one another
C)   both are subducted beneath each otherD) A) and B)
E) A) and C)

Question 19

Which location on this figure from the Investigation is most likely to have volcanoes formed above a subduction zone?

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   5F) None of the above
G) B) and E)

Question 20

Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle

Accepted Answer

A)   Likely
B)   UnlikelyC) A) and B)
D) undefined

Exam 3: Plate Tectonics

Mid-ocean ridges are elevated above the seafloor. The elevation of the seafloor:

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What ideas brought a renewed interest to the idea of continental drift?

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On this map, identify which letter is over the Atlantic ocean.

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At mid-ocean ridges, as two plates diverge:

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A continent has an oceanic trench offshore of its coast. Which of the following is probably NOT present along this side of the continent?

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An oceanic transform plate boundary is most likely associated with an) :

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Which areas) on this world map are likely to be near a plate boundary?

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A convergent plate boundary is most likely associated with an) :

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Mid-ocean ridges form where two ocean plates:

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Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle

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This figure shows plate boundaries south of Alaska. Which location is along a convergent boundary?

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If a magnetic stripe is 120 km wide and formed over 4 m.y., what would the rate of seafloor spreading be?

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How is magma created in a subduction zone?

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Enormous mountain belts and high plateaus can be formed when two continental plates collide and:

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On this map of South America, which features are NOT on a plate boundary?

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Use your knowledge of plate boundaries to answer whether an earthquake is likely or unlikely to occur at the location of the red circle.

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Which feature on this figure is formed by bending of the subducted plate?

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Which location on this figure from the Investigation is most likely to have volcanoes formed above a subduction zone?

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The process of one plate sliding beneath another plate is called:

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How many times did the Earth's magnetic field switch from north to south in the last 10 million years?

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