Question 1

Early results of the Deep Sea Drilling Project clearly justified the conclusion that_______ .

Accepted Answer

A)  Proterozoic rocks are found only as seamounts in the deepest parts of the ocean basins
B)  the youngest sediments were deposited directly on the oldest seafloor basalts
C)  the oceans have not always contained most of Earth's water
D)  the ocean basins are relatively young; most ocean basin rocks and sediments are Cretaceous or younger in age

Question 2

The continental drift hypothesis was rejected primarily because Alfred Wegener could not_______ .

Accepted Answer

A)  identify a mechanism capable of moving continents
B)  disprove competing theories that were more accepted by scientists
C)  find geologic similarities on different continents
D)  all of the above

Question 3

Deep- oceanic trenches are most abundant around the rim of the_______ ocean basin.

Accepted Answer

A)  Pacific
B)  Atlantic
C)  Arctic
D)  Indian

Question 4

New oceanic crust and lithosphere are formed at_______ .

Accepted Answer

A)  convergent boundaries by submarine eruptions and intrusions of basaltic magma
B)  divergent boundaries by submarine eruptions and intrusions of basaltic magma
C)  divergent boundaries by submarine eruptions and intrusions of rhyolitic magma
D)  convergent boundaries by submarine eruptions and intrusions of rhyolitic magma B

Question 5

Linear, magnetic patterns associated with mid- ocean ridges are configured as_______ .

Accepted Answer

A)  normal and reversed magnetized strips roughly parallel to the ridge
B)  reversed magnetizations along the rift valleys and normal magnetizations along the ridge
C)  concentric circles about a rising plume of hot mantle rocks and magma
D)  normal and reversed magnetized strips roughly perpendicular to the ridge axis

Question 6

The _______is an example of an active, continent- continent collision.

Accepted Answer

A)  westward movement of the South American plate over the Nazca plate
B)  Arabian Peninsula slamming into North Africa under the Red Sea
C)  northern movement of Baja California and a sliver of western California toward the Hawaiian Islands
D)  northward movement of India into Eurasia

Question 7

A typical rate of seafloor spreading in the Atlantic Ocean is_______ .

Accepted Answer

A)  0.1 inches per year
B)  2 feet per year
C)  20 feet per year
D)  2 centimeters per year

Question 8

_______was never proposed as evidence supporting the existence of Pangaea.

Accepted Answer

A)  Islands of Precambrian rocks along the Mid- Atlantic Ridge
B)  Similar fossils on different continents
C)  Late Paleozoic glacial features
D)  Geometrical fit between South America and Africa

Question 9

A very long- lived magma source located deep in the mantle is called a ________.

Accepted Answer

A)  hot spot
B)  magma welt
C)  basalt spout
D)  melt well

Question 10

_______, in the north Atlantic Ocean, is a volcanic island formed over a hot spot on a divergent plate boundary.

Accepted Answer

Iceland

Question 11

A transform plate boundary is characterized by_______ .

Accepted Answer

A)  two converging oceanic plates meeting head- on and piling up into a mid- ocean ridge
B)  a divergent boundary where the continental plate changes to an oceanic plate
C)  a deep, vertical fault along which two plates slide past one another in opposite directions
D)  stratovolcanoes on the edge of a plate and shield volcanoes on the adjacent plate C

Question 12

Which of the following statements apply to the asthenosphere, but not the lithosphere?

Accepted Answer

A)  deforms mainly by brittle fracturing and faulting
B)  zone in the upper mantle that deforms by plastic flowage
C)  cool, rigid layer of crust and upper mantle that forms the tectonic plates
D)  partial melting of rising granitic plumes produces huge volumes of basaltic magma

Question 13

Cooler, older, oceanic lithosphere sinks into the mantle at ________.

Accepted Answer

A)  transform fault zones along divergent plate boundaries
B)  sites of long- lived, hot spot volcanism in the ocean basins
C)  rift zones along mid- ocean ridges
D)  subduction zones along convergent plate boundaries

Question 14

The volcanoes and deep valleys of east Africa are related to a_______ .

Accepted Answer

A)  continental collision zone between Africa and the Zagros Mountains along the southern margin of Eurasia
B)  continental rift along which parts of the African continent are beginning to slowly separate
C)  transform fault aligned with the Red Sea carrying the Arabian and African blocks in opposite directions
D)  fault allowing Arabia to slip westward past east Africa and penetrate into Turkey

Question 15

If you could time travel back to the 1920s and meet Alfred Wegener, who was the original proponent of the continental drift hypothesis, what could you tell him about our modern idea of plate tectonics? What would you tell him regarding the structure of the Earth's interior, what evidence exists for plate tectonics, what is the relationship between volcanoes and earthquakes to plate tectonics (specifics), and what are some (if any)of the problems we still have in explaining certain features of plate tectonics?

Accepted Answer

The Earth is divided into different laye...

Question 16

Which one of the following most accurately describes the volcanoes of the Hawaiian Islands?

Accepted Answer

A)  shield volcanoes fed by a long- lived hot spot below the Pacific lithospheric plate
B)  stratovolcanoes associated with a mid- Pacific transform fault
C)  shield volcanoes associated with a mid- Pacific ridge and spreading center
D)  stratovolcanoes associated with subduction and a convergent plate boundary

Question 17

The late Paleozoic supercontinent is known as_______ .

Accepted Answer

A)  Panatopia
B)  Pangaea
C)  Pandomonia
D)  Pancakea

Question 18

Rifting and normal faulting are characteristic of a(n)________ plate boundary.

Accepted Answer

The answer of Rifting and normal faulting are characteristic of...

Question 19

During the first two decades of the twentieth century,_______ was a vigorous proponent of continental drift.

Accepted Answer

The answer of During the first two decades of the...

Question 20

All of the following are evidence supporting the theory of plate tectonics EXCEPT for .

Accepted Answer

A)  changes in the Moon's orbit due to shifting plates
B)  ocean floor drilling
C)  paleomagnetism
D)  hot spots

Exam 2: Plate Tectonics: a Scientific Revolution Unfolds

Early results of the Deep Sea Drilling Project clearly justified the conclusion that_______ .

Correct Answer
verified

The continental drift hypothesis was rejected primarily because Alfred Wegener could not_______ .

Correct Answer
verified

Deep- oceanic trenches are most abundant around the rim of the_______ ocean basin.

Correct Answer
verified

New oceanic crust and lithosphere are formed at_______ .

Correct Answer
verified
B

Linear, magnetic patterns associated with mid- ocean ridges are configured as_______ .

Correct Answer
verified

The _______is an example of an active, continent- continent collision.

Correct Answer
verified

A typical rate of seafloor spreading in the Atlantic Ocean is_______ .

Correct Answer
verified

_______was never proposed as evidence supporting the existence of Pangaea.

Correct Answer
verified

A very long- lived magma source located deep in the mantle is called a ________.

Correct Answer
verified

_______, in the north Atlantic Ocean, is a volcanic island formed over a hot spot on a divergent plate boundary.

Correct Answer
verified
Iceland

A transform plate boundary is characterized by_______ .

Correct Answer
verified
C

Which of the following statements apply to the asthenosphere, but not the lithosphere?

Correct Answer
verified

Cooler, older, oceanic lithosphere sinks into the mantle at ________.

Correct Answer
verified

The volcanoes and deep valleys of east Africa are related to a_______ .

Correct Answer
verified

Correct Answer
verified
The Earth is divided into different laye...
View Answer

Which one of the following most accurately describes the volcanoes of the Hawaiian Islands?

Correct Answer
verified

The late Paleozoic supercontinent is known as_______ .

Correct Answer
verified

Rifting and normal faulting are characteristic of a(n)________ plate boundary.

Correct Answer
verified

During the first two decades of the twentieth century,_______ was a vigorous proponent of continental drift.

Correct Answer
verified

All of the following are evidence supporting the theory of plate tectonics EXCEPT for .

Correct Answer
verified

Exam 2: Plate Tectonics: a Scientific Revolution Unfolds

Early results of the Deep Sea Drilling Project clearly justified the conclusion that_______ .

Correct AnswerverifiedShow Answer

The continental drift hypothesis was rejected primarily because Alfred Wegener could not_______ .

Correct AnswerverifiedShow Answer

Deep- oceanic trenches are most abundant around the rim of the_______ ocean basin.

Correct AnswerverifiedShow Answer

New oceanic crust and lithosphere are formed at_______ .

Correct AnswerverifiedB

Linear, magnetic patterns associated with mid- ocean ridges are configured as_______ .

Correct AnswerverifiedShow Answer

The _______is an example of an active, continent- continent collision.

Correct AnswerverifiedShow Answer

A typical rate of seafloor spreading in the Atlantic Ocean is_______ .

Correct AnswerverifiedShow Answer

_______was never proposed as evidence supporting the existence of Pangaea.

Correct AnswerverifiedShow Answer

A very long- lived magma source located deep in the mantle is called a ________.

Correct AnswerverifiedShow Answer

_______, in the north Atlantic Ocean, is a volcanic island formed over a hot spot on a divergent plate boundary.

Correct AnswerverifiedIceland

A transform plate boundary is characterized by_______ .

Correct AnswerverifiedC

Which of the following statements apply to the asthenosphere, but not the lithosphere?

Correct AnswerverifiedShow Answer

Cooler, older, oceanic lithosphere sinks into the mantle at ________.

Correct AnswerverifiedShow Answer

The volcanoes and deep valleys of east Africa are related to a_______ .

Correct AnswerverifiedShow Answer

Correct AnswerverifiedThe Earth is divided into different laye...View AnswerShow Answer

Which one of the following most accurately describes the volcanoes of the Hawaiian Islands?

Correct AnswerverifiedShow Answer

The late Paleozoic supercontinent is known as_______ .

Correct AnswerverifiedShow Answer

Rifting and normal faulting are characteristic of a(n)________ plate boundary.

Correct AnswerverifiedShow Answer

During the first two decades of the twentieth century,_______ was a vigorous proponent of continental drift.

Correct AnswerverifiedShow Answer

All of the following are evidence supporting the theory of plate tectonics EXCEPT for .

Correct AnswerverifiedShow Answer

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B

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Iceland

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C

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The Earth is divided into different laye...
View Answer

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