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15
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The point underground where the earthquake occurs is called the:
Focus
Foreshock
Aftershock
Epicenter
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What does the Richter scale measure?
The amount of ground shaking and energy released.
The time and location an earthquake
The number of houses that are damaged
The amount of ground shaking and energy of a volcano
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15
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Which statement is FALSE about tectonic plates?
They fit together like puzzle pieces.
They have very specific movements.
They sit on top of a fluid part of earth's interior.
They make up the earth's crust.
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15
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How does fire danger increase during earthquakes?
Cities cannot afford enough firefighters to put them out.
There is not enough water available during large earthquakes
Fallen debris can be flammable, & electrical wiring.
Cities cannot afford enough firefighters to stop them.
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15
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Where is the epicenter of an earthquake found?
Above ground, directly above the focus.
Underground, below the focus.
Underground, where the rock is breaking.
About a mile away from the focus.
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15
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A _____ is a machine that produces (a) _____.
seismograph, seismogram
primary wave, secondary wave
seismograph, body wave
seismogram, seismograph
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15
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How does a magnitude 4 earthquake differ from a magnitude 8 earthquake in regard to energy?
The magnitude 8 earthquake has 1,024 times the energy
he magnitude 8 earthquake has 32,768 times energy
The magnitude 8 earthquake has 128 times the energy
The magnitude 8 has 1,048,576 times energy than the 4
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15
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What can you expect to happen after experiencing an earthquake?
You should expect to feel foreshocks.
You can assume that there will be no more earthquakes.
You should expect to feel aftershocks.
You can assume that geologists will be able to predict it.
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15
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Which of the following choices describes a tsunami?
A portion of the ground that loosens and slides downhill
Buildings and roads on the Earth's surface that are shaken
The shaking of the ground that liquefies water based soil
A huge sea wave resembling a large rising tide.
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15
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An earthquake of Richter magnitude _____ produces 100 times more ground shaking than an earthquake of magnitude _____?
2,3
3,1
3,4
3,2
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baam
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15
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The elastic rebound theory explains how:
Ground shaking causes faults to slip.
Body waves travel faster than surface waves.
Fault slipping causes ground shaking.
The epicenter is directly above the focus.
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What does it mean to say that the Richter scale is logarithmic?
Magnitude is cut in half for each step
Magnitude is doubled for each step
There is a ten-fold decrease for each step
There is ten-fold increase in ground shaking for each step
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baam
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15
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Why can geologists not predict earthquakes?
Foreshocks often don't register on seismographs.
Activities along fault lines are unpredictable.
Earthquakes are man made, not natural.
Earthquakes depend on the weather, which is unpredictable.
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