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Earthquakes Flashcards | StudBud
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Earthquakes
Earthquakes
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1
The most destructive earthquakes are almost always...
shallow focus earthquakes
intermediate focus earthquakes.
deep focus earthquakes.
either shallow or intermediate focus earthquakes.
2
Which Seismic waves cause the most damage?
P waves
S waves
Rayleigh waves
Love waves
3
Who developed the Elastic Rebound Theory?
Paisley P. Pratt
Albert Einstein
Alfred Wegener
H. F. Reid
4
How many seismic monitoring stations are needed to determine the exact location of the epicenter of an earthquake?
3
2
1
4
5
According to the Richter scale, how much stronger is an 8 earthquake than a 1?
100x
1,000,000x
10,000x
10,000,000x
6
At what kind of place do earthquakes generally occur?
the center of continental plates
fault lines
under water
volcanoes
7
A subjective assessment of the damage done by earthquakes is expressed by...
dilatancy
magnitude
intensity
seismicity
8
According to the Richter Scale, how many earthquakes of magnitude 8 or more occur each year on average?
1 or 2
less than 10
5 to 6
more than 10 but less than 20
9
Body waves are...
P waves
S waves
surface waves
P and S waves
10
These waves are the Fastest waves released from an earthquake.
Love
S
P
Rayleigh
11
Which of these is not related to damage caused by earthquakes?
damage to building foundations
Fires caused by broken gas lines.
Liquefaction causing the ground to act like a liquid.
Change in climate due to the shifting of the Earth's plates.
12
What kind of forces produce earthquakes at divergent boundaries?
shear
tension
normal
compression
13
Why does Nevada experience earthquakes even though we are not on a plate boundary?
Nevada has a lot of volcanic activity under it.
Many of the valleys in Nevada have faults under them.
Nevada is on the edge of a tectonic plate.
Nevada has too much sandy soil.
14
The exact point within the Earth where an earthquake happens is called the _____.
breakpoint
focus
nucleus
epicenter
15
Which of these areas would be least likely to have a damaging earthquake?
Alaska
California
Japan
England
16
Which of these is the epicenter of an earthquake?
The point on the Earth's surface directly above the focus.
The place where the greatest damage occurs.
The seismic station closest to the earthquake.
The point below the surface where rock breaks and the first motion occurs.
17
What is an Earthquake?
When rocks within the Earth melt, causing a change in density.
A sudden release of energy when rocks within the Earth break.
Anything that causes the earth to vibrate.
It depends on your culture.
18
These are the second fastest waves released by an earthquake.
Rayleigh
Love
P
S
19
What kind of faults are generally found at divergent boundaries?
thrust
normal
strike/slip
reverse
20
Nearly all intermediate and deep focus earthquakes occur in these zones.
Eastern time zones
volcano zones
convergent plate zones
subduction zones
21
What is a tsunami?
An earthquake that happens as a result of human activity.
A type of earthquake that only happens under volcanoes.
A series of ocean waves caused by earthquakes under the ocean's crust.
An earthquake with a magnitude greater than 7.0.
22
The majority of all earthquakes occur in the ...
Mediterranean / Asiatic seismic belt.
Circum Pacific Belt.
Circum Atlantic Belt.
interior of seismic plates.
23
The most damaging earthquakes for people tend to be...
shallow focus
deep water
deep focus
intermediate focus
24
Why do most earthquakes happen in the crust rather than the mantle?
The mantle is made up of cream cheese and cannot make earthquakes.
The mantle is partially molten and the rocks are too plastic to break.
The mantle is made up of rocks that cannot be broken.
The mantle is too deep for earthquakes to reach the surface.
25
How does the Elastic Rebound Theory explain the generation of earthquakes?
Rocks under tectonic forces deform until they break, causing earthquakes.
Plastic rocks of the Asthenosphere bend and snap back causing earthquakes.
Pressure from magma deep within the Earth builds until it shakes the crust.
Elastic rocks do not rebound to their former positions, causing earthquakes
