Quiz History_ Exam 3
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School
Tarrant County College, Fort Worth *
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Course
1403
Subject
Geology
Date
Dec 6, 2023
Type
Pages
17
Uploaded by CaptainNightingale2524
Exam 3 Results
Correct answers are hidden.
Score for this quiz:
48
out of 50
Submitted Oct 23 at 9:55am
This attempt took 46 minutes.
1 / 1 pts
Question 1
The composition of the core is:
peridotite.
basalt.
granite.
iron.
iron and nickel metal.
1 / 1 pts
Question 2
The name of the point on Earth's surface vertically above the hypocenter is
the ____________________.
epicenter
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Question 3
The focus of the most destructive earthquakes is almost always:
shallow.
intermediate.
deep.
internediate and deep.
shallow, intermediate, or deep.
1 / 1 pts
Question 4
Aftershocks do not cause much damage.
True
False
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Question 5
The magnitude of an earthquake measures:
its intensity.
the damage created.
the energy released.
the duration of trembling.
its intensity and the duration of trembling.
1 / 1 pts
Question 6
If you could drill from the outer surface of Earth all the way to the center, you
would pass through the major divisions of Earth: the
____________________, the ____________________, and finally the
____________________.
crust, mantle, core
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Question 7
We know that the mantle is not molten because P-waves can travel through
it.
True
False
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Question 8
The composition of the mantle is:
peridotite.
basalt.
granite.
iron.
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iron and nickel metal.
0 / 1 pts
Question 9
Incorrect
Incorrect
The name of the location within Earth where earthquakes originate is the
____________________.
focus
1 / 1 pts
Question 10
The percentage of all earthquakes that occur along a plate boundary is
nearly:
100%.
95%.
80%.
55%.
25%.
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Question 11
Monitoring changes in electrical resistance is a scientifically accepted
method used to predict earthquakes.
True
False
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Question 12
The structural layer that the P- and S-wave low-velocity zone in the upper
part of the mantle closely corresponds to is the ____________________.
asthenosphere
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Question 13
Tsunamis are significant sources of danger created by earthquakes.
True
False
1 / 1 pts
Question 14
The velocities of P- and S-waves are determined by these two properties of
the material they are passing through: ____________________ and
____________________.
density, elasticity
1 / 1 pts
Question 15
The two types of body waves are ____________________ wave and
____________________ waves.
P/primary/compressional, S/secondary/shear
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Question 16
The two major types of seismic waves are ____________________ waves
and ____________________ waves.
surface, body
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Question 17
According to the elastic rebound theory:
rocks will bend before they break.
rocks will snap back into their original shape after faulting.
rocks will break when their capacity to store energy of deformation has been
exceeded.
rocks will bend before they break AND will snap back to their original shape
after faulting.
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rocks will bend before they break, will snap back to their original shape after
faulting, AND will break when their capacity to store energy of deformation
has been exceeded.
1 / 1 pts
Question 18
The hanging wall block moves downward relative to the footwall block in a
normal fault.
True
False
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Question 19
Oceanic-continental plate orogenesis can be recognized in the geological
record by a(n):
accretionary wedge containing ophiolites.
landward belt of volcanoes and batholiths.
inland zone of block faults.
accretionary wedge containing ophiolites AND landward belt of volcanoes and
batholiths.
all of these.
1 / 1 pts
Question 20
When an isolated mountain range occurs in the interior of a continent, one
may infer that the range formed by:
the collision of two continental plates.
compressive forces acting on the opposing margins of a single plate.
the rifting of the continent.
the growth of a volcanic arc.
the collision of two continental plates or the growth of a volcanic arc
1 / 1 pts
Question 21
The best example of continuing orogeny at an oceanic-continental plate
boundary is the Andes.
True
False
1 / 1 pts
Question 22
A fault with both dip-slip and strike-slip movement is classified as a thrust
fault.
True
False
1 / 1 pts
Question 23
Uplifted blocks are called:
tensional blocks.
grabens.
horsts.
fault blocks.
graves.
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Question 24
A fold that has axial beds that are younger than those of its limbs and limbs
that dip toward its axis is called a(n) ____________________.
syncline
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Question 25
If you have one foot on either side of a fault with a vertical dip and the right
block moves toward you, what type of fault are you straddling?
normal
reverse
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left-lateral oblique-slip
left-lateral strike-slip
right-lateral strike-slip
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Question 26
The type of fold that forms traps for most of the world's produced petroleum
is a(n) ____________________.
anticline
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Question 27
In a(n) ____________________, the youngest rocks are in the center, and
the oldest are on the outside. In a(n) ____________________, the oldest
rocks are in the center, and the youngest are on the outside.
basin, dome
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Question 28
A fold is the result of ____________________ deformation.
plastic
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Question 29
The type of strain that occurs depends not only on the kind of stress applied,
but also on the:
amount of pressure and degree of temperature.
rock type.
duration of the stress
A and C
A and B
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Question 30
A(n) ____________________ divides a fold into two halves.
axial plane
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Question 31
Continental crust is always thicker than oceanic crust.
True
False
1 / 1 pts
Question 32
An episode of mountain building is known as a(n) ____________________.
orogeny
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Question 33
Each half of a fold is known as a(n) ____________________.
limb
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Question 34
At the San Andreas fault, the Pacific Plate is moving northwest relative to the
southeast moving North American Plate. Therefore, movement along the
San Andreas is:
compressional
tensional
right-lateral
left-lateral
vertical
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1 / 1 pts
Question 35
When a stalagmite has an oxygen-18 to ____________________ ratio that
is low, the climate at the time the stalagmite formed was relatively
____________________
oxygen 16; cool
1 / 1 pts
Question 36
Carbon 14 is useful for archeological samples because it is effective back to
approximately ____________________ years.
70,000
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Question 37
The time equivalence of strata is determined by:
correlation of unusual lithologies.
correlation of key beds.
correlation of fossils.
lateral tracing.
superposition.
1 / 1 pts
Question 38
The time necessary for half of the atoms of the unstable parent element to
decay to the new, more stable daughter element is the isotope's
____________________.
half-life
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Question 39
Potassium 40 decays to argon 40 by a single electron capture.
True
False
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Question 40
The principle of ____________________ states that rock layers extended
laterally in all directions unless or until they terminate in one of a number of
natural means.
lateral continuity
1 / 1 pts
Question 41
Uraniun 234 to thorium 230 dating of layers of stalagmites is reliable back to
about 1,000,000 years.
True
False
1 / 1 pts
Question 42
After one half-life, ____________________% of the radioactive parent
atoms will have decayed to stable daughter atoms.
50
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Question 43
In order to correlate age-equivalent rock units of dissimilar composition or to
correlate rock units over a large area, ____________________ and the
principle of ____________________ must be used.
fossils, fossil succession
1 / 1 pts
Question 44
Uranium 235 decays to lead 207 by 7 alpha and 6 beta steps.
True
False
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1 / 1 pts
Question 45
The best dating method for a frozen mammoth carcass is rubidium 87-
strontium 87.
True
False
1 / 1 pts
Question 46
The age of the Earth is:
12.6 billion years.
12.6 million years.
4.6 billion years.
4.6 million years.
10,000 years.
0 / 1 pts
Question 47
Incorrect
Incorrect
The principle of original horizontality states that ____________________
rocks were deposited in horizontal layers. Thus, if rock layers are now
____________________, they must have been disturbed after lithification.
sedimentary; tilted
1 / 1 pts
Question 48
The best dating method for fine-grained volcanic rocks is potassium 40-
argon 40.
True
False
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Question 49
____________________ dating is used to obtain absolute age dates.
Radiometric
1 / 1 pts
Question 50
A sedimentary rock that shows evidence of contact metamorphism must be
____________________ in age than the igneous rock with which it is in
contact, even if it lies above the igneous rock.
older
Quiz Score:
48
out of 50