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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
Identify how liquefaction occurs during an earthquake.
 
Liquefaction occurs when ground shaking loosens moist soil
 
Liquefaction occurs when the ground shaking loosens rock
 
Liquefaction describes an effect such as ripples in a pond
 
Liquefaction occurs when a large ocean wave comes onto land.
The elastic rebound theory explains how:
 
Fault slipping causes ground shaking.
 
Ground shaking causes faults to slip.
 
The epicenter is directly above the focus.
 
Body waves travel faster than surface waves.
Which statement is FALSE about tectonic plates?
 
They have very specific movements.
 
They sit on top of a fluid part of earth's interior.
 
They fit together like puzzle pieces.
 
They make up the earth's crust.
The magnitude of an earthquake is how _____.
 
big or strong it is
 
much damage it does
 
long it lasts
 
fast its waves travel
P-waves travel as _____ waves while S-waves travel as _____ waves.
 
compressional, transverse
 
horizontal, compressional
 
transverse, compressional
 
horizontal, transverse
A _____ is a machine that produces (a) _____.
 
seismograph, seismogram
 
primary wave, secondary wave
 
seismogram, seismograph
 
seismograph, body wave
The seismic waves that do most of the shaking are:
 
Rayleigh
 
Love
 
Body
 
Primary
What can you expect to happen after experiencing an earthquake?
 
You should expect to feel aftershocks.
 
You should expect to feel foreshocks.
 
You can assume that there will be no more earthquakes.
 
You can assume that geologists will be able to predict it.
Why can geologists not predict earthquakes?
 
Activities along fault lines are unpredictable.
 
Earthquakes are man made, not natural.
 
Earthquakes depend on the weather, which is unpredictable.
 
Foreshocks often don't register on seismographs.
Why do earthquakes occur?
 
Stress builds up around fault lines
 
Climate change
 
Hurricanes
 
Atmospheric pressure
The movement of the ground due to rock breaking below the surface during an earthquake is known as _____.
 
seismic activity
 
ground heave
 
subsidence
 
settlement
How does a magnitude 4 earthquake differ from a magnitude 8 earthquake in regard to energy?
 
The magnitude 8 has 1,048,576 times energy than the 4
 
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
What does it mean to say that the Richter scale is logarithmic?
 
There is ten-fold increase in ground shaking for each step
 
Magnitude is doubled for each step
 
Magnitude is cut in half for each step
 
There is a ten-fold decrease for each step
The point underground where the earthquake occurs is called the:
 
Focus
 
Epicenter
 
Foreshock
 
Aftershock
Tsunamis are caused by earthquakes that occur _____.
 
underwater
 
in the plains
 
in the mountains
 
in the Earth's core
Where is the epicenter of an earthquake found?
 
Above ground, directly above the focus.
 
Underground, below the focus.
 
About a mile away from the focus.
 
Underground, where the rock is breaking.
What are the characteristics of an earthquake that make it so damaging?
 
Earthquakes occur with little or no warning.
 
Landslides and mudslides caused by earthquakes.
 
Many cities do not have enough first responders.
 
Cities can't afford to rebuild right away.
Which of the following choices describes a tsunami?
 
A huge sea wave resembling a large rising tide.
 
A portion of the ground that loosens and slides downhill
 
The shaking of the ground that liquefies water based soil
 
Buildings and roads on the Earth's surface that are shaken
How does fire danger increase during earthquakes?
 
Fallen debris can be flammable, & electrical wiring.
 
There is not enough water available during large earthquakes
 
Cities cannot afford enough firefighters to put them out.
 
Cities cannot afford enough firefighters to stop them.
An earthquake of Richter magnitude _____ produces 100 times more ground shaking than an earthquake of magnitude _____?
 
3,1
 
3,4
 
2,3
 
3,2
An earthquake of Richter magnitude _____ produces 100 times more ground shaking than an earthquake of magnitude _____?
 
3,1
 
3,4
 
2,3
 
3,2
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