1 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 
Felsic and mafic are terms used by geologists to describe:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A)  |
composition of continental and oceanic crust. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B)  |
behavior of earthquake waves. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C)  |
the mechanical behavior of rocks. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D)  |
none of these. |
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2 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 
The boundary that separates the crust from the mantle is called:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A)  |
the crust-mantle boundary. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B)  |
the lithosphere. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C)  |
the Moho. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D)  |
all of these. |
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3 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 
The inner core is most likely composed of:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A)  |
silicon. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B)  |
oxygen. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C)  |
sulfur. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D)  |
iron. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
4 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
The principle of continents being in buoyant equilibrium is known as:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
isostasy. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
the principle of buoyant equilibrium. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
the elastic rebound theory. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
none of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
5 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
A positive gravity anomaly indicates:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
an excess of mass. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
a deficiency in mass. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
a reversal of the gravitational field. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
none of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
6 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
Positive gravity anomalies are often associated with:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
deep ocean trenches |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
ore bodies beneath Earth’s surface. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
large cavern systems beneath Earth’s surface |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
all of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
7 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
A positive magnetic anomaly indicates:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
a body of magnetic ore. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
an intrusion of gabbro. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
mafic rock masses. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
all of the above. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
8 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
Which of the following is not an example of isostasy?
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
deep mountain roots. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
crustal rebound. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
ocean basins are deeper than continents. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
all of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
9 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
The S-wave shadow zone is evidence that:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
the outer core is liquid. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
the outer core is composed of iron and nickel oxides. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
the inner core is solid. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
it is very hot near the core. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
10 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
The physical evidence that the core is composed mostly of iron is:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
the known mass of Earth requires material of high density at the core. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
scientists have sampled the core and determined its composition. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
volcanoes regularly erupt material from the core to the surface. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
all of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
11 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
The velocity of seismic waves varies through Earth because:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
temperature varies within the Earth. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
density of rocks varies within the Earth. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
the composition of rocks varies within the Earth. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
all of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
12 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
Convection is likely occurring in:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
the mantle. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
the outer core. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
both the mantle and the outer core. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
throughout the Earth. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
13 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
The interior composition and structure of Earth have been deduced in part from:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
studies of meteorites. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
deep drilling projects. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
analyses of the behavior of seismic waves. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
all of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
14 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
Heat inside Earth:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
is generated by radioactive decay. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
is uniform throughout the interior. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
decreases with increasing depth. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
none of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
15 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
The geothermal gradient in the crust averages:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
25 degrees Celsius per kilometer. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
1 degree Celsius per kilometer. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
10 degrees Celsius per kilometer. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
100 degrees Celsius per kilometer. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
16 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
Heat flow to the surface of Earth:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
varies from place to place. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
is highest in areas of active volcanism |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
is lowest in stable continental interiors. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
all of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
17 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
The boundary between the crust and mantle:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
coincides with the boundary between the asthenosphere and lithosphere. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
is marked by a change is velocity of seismic waves. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
is the source of the S-wave shadow zone. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
none of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
18 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
The largest portion of Earth’s volume is:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
the crust. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
the mantle. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
the inner core. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
the outer core. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
19 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
The composition of the upper mantle is known because:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
samples of mantle rock have been analyzed by scientists. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
meteorites are believed to be similar to the mantle. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
some caves on Earth extend into the mantle. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
none of these. |
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 ![THE THEORY OF ISOSTASY Assignment 12]() |
20 |
 ![THE THEORY OF ISOSTASY Assignment 1]() |
 ![THE THEORY OF ISOSTASY Assignment 2]()
The average thickness of the crust is:
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
A) ![THE THEORY OF ISOSTASY Assignment 5]() |
10-12 km. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
B) ![THE THEORY OF ISOSTASY Assignment 5]() |
30-50 km. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
C) ![THE THEORY OF ISOSTASY Assignment 5]() |
100-150 km. |
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 ![THE THEORY OF ISOSTASY Assignment 4]() |
D) ![THE THEORY OF ISOSTASY Assignment 5]() |
1 km. |
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