Question 1

The energy in an earthquake is released

Accepted Answer

A)  all at once.
B)  before the quake, after the quake, and during the quake.
C)  as an epicenter focus.
D)  in unconsolidated rock.

Question 2

Rocks in the core of an anticline are than rocks away from the core.

Accepted Answer

A)  higher
B)  lower
C)  older
D)  younger

Question 3

Compared with oceanic crust, continental crust is very buoyant because it is

Accepted Answer

A)  composed of basaltic rock that contains air bubbles from successive lava flows.
B)  composed of granitic rocks whereas oceanic crust is composed of basaltic rocks.
C)  thinner and forms a thin upper skin on the oceanic crust below.
D)  very young and fresh.

Question 4

When the magnetic field of Earth is reversed,

Accepted Answer

A)  Earth flips over in its orbit.
B)  Earth's rotation is also reversed.
C)  newly formed mineral grains on the ocean floor are magnetized according to the new orientation of the magnetic field.

Question 5

The theory of seafloor spreading is attributed to

Accepted Answer

A)  Harry Hess.
B)  Marie Tharp.
C)  Alfred Wegener.
D)  Richard Oldham

Question 6

Subduction is the process of one lithospheric plate descending beneath another. Why does the oceanic portion of the lithosphere undergo subduction while the continental portion does not?

Accepted Answer

Oceanic crust is more dense th...

Question 7

In a reconstruction of Earth's geologic past, the continents of Africa and South America fit best along the

Accepted Answer

A)  shorelines.
B)  continental shelves.
C)  continental slopes.
D)  ocean floors.

Question 8

The mantle can be separated into two different portions: the lower mantle and the upper mantle. The lower mantle is

Accepted Answer

A)  completely solid due to extreme pressure that prevents iron-rich silica rocks from melting.
B)  composed of silly putty that flows like molasses.
C)  rigid and has no capability of flow.
D)  predominantly liquid silica.

Question 9

Most of the state of Nevada is in the Basin and Range Province. The predominant active fault for this region is

Accepted Answer

A)  thrust faulting.
B)  reverse faulting.
C)  normal faulting.
D)  none of the above.

Question 10

Tectonic interaction between plate boundaries does NOT explain

Accepted Answer

A)  magma production and the variety of igneous rocks.
B)  mountain building.
C)  polar wandering.
D)  global distribution of earthquakes and volcanoes.

Question 11

plates are touching-plate boundaries. When the stress reaches a critical threshold, rocks break, slide past each other, and earthquakes are generated.

Accepted Answer

Stress builds up in ...

Question 12

In comparison to P-waves, S-waves

Accepted Answer

A)  compress and expand the rock as they move through it.
B)  can travel through all mediums-solid granite, magma, water and/or air.
C)  can travel only through solids-not in fluids.
D)  are fast and the first to register on a seismograph.

Question 13

We can say that Earth's crust floats on the mantle because

Accepted Answer

A)  the mantle is very hot and flows from internal convection.
B)  part of the mantle is hot enough to flow as a plastic solid.
C)  the continental crust floats on the oceanic crust.
D)  the mantle is below the crust.

Question 14

At divergent boundaries the dominant rock type is

Accepted Answer

A)  basalt.
B)  granite.
C)  andesite.
D)  basalt, granite, and andesite.

Question 15

Continental crust is

Accepted Answer

A)  thinner than oceanic crust.
B)  less dense than oceanic crust.
C)  more dense than oceanic crust.
D)  thinner and more dense than oceanic crust.

Question 16

Plate tectonics differs from continental drift because it

Accepted Answer

A)  provides a credible driving force.
B)  did not explain the fit between South America and Africa.
C)  showed that ancient ice sheets did not exist.
D)  showed that Pangaea broke up much later than predicted.

Question 17

Spreading centers occur along

Accepted Answer

A)  trenches.
B)  transform faults.
C)  mid-ocean ridges.
D)  the northern and western margins of the Juan de Fuca Plate.

Question 18

The theory of continental drift is attributed to

Accepted Answer

A)  H.H. Hess.
B)  Alfred Wegener.
C)  W. Loma Prieta.
D)  Simon Tectonic.

Question 19

Thermal convection movement in the upper mantle

Accepted Answer

A)  generates the electric current that powers Earth's magnetic field.
B)  greatly influences Earth's surface features.
C)  heats Earth's core by frictional forces.
D)  is usually negligible.

Question 20

The Himalayan Mountains formed at which type of plate boundary?

Accepted Answer

A)  Transform-fault boundary.
B)  Oceanic-continental convergent boundary.
C)  Divergent boundary.
D)  Continental-continental convergent boundary.

Exam 21: Plate Tectonics and Earths Interior

We can say that Earth's crust floats on the mantle because

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The mantle can be separated into two different portions: the lower mantle and the upper mantle. The lower mantle is

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Continental crust is

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The Himalayan Mountains formed at which type of plate boundary?

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Spreading centers occur along

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In a reconstruction of Earth's geologic past, the continents of Africa and South America fit best along the

Correct AnswerverifiedShow Answer

Thermal convection movement in the upper mantle

Correct AnswerverifiedShow Answer

The energy in an earthquake is released

Correct AnswerverifiedShow Answer

In comparison to P-waves, S-waves

Correct AnswerverifiedShow Answer

When the magnetic field of Earth is reversed,

Correct AnswerverifiedShow Answer

Rocks in the core of an anticline are than rocks away from the core.

Correct AnswerverifiedShow Answer

At divergent boundaries the dominant rock type is

Correct AnswerverifiedShow Answer

plates are touching-plate boundaries. When the stress reaches a critical threshold, rocks break, slide past each other, and earthquakes are generated.

Correct AnswerverifiedStress builds up in ...View AnswerShow Answer

The theory of continental drift is attributed to

Correct AnswerverifiedShow Answer

Compared with oceanic crust, continental crust is very buoyant because it is

Correct AnswerverifiedShow Answer

Most of the state of Nevada is in the Basin and Range Province. The predominant active fault for this region is

Correct AnswerverifiedShow Answer

The theory of seafloor spreading is attributed to

Correct AnswerverifiedShow Answer

Subduction is the process of one lithospheric plate descending beneath another. Why does the oceanic portion of the lithosphere undergo subduction while the continental portion does not?

Correct AnswerverifiedOceanic crust is more dense th...View AnswerShow Answer

Tectonic interaction between plate boundaries does NOT explain

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Plate tectonics differs from continental drift because it

Correct AnswerverifiedShow Answer

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Stress builds up in ...
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Oceanic crust is more dense th...
View Answer

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