An earthquake of Richter magnitude _____ produces 100 times more ground shaking than an earthquake of magnitude _____?
3,2
2,3
3,4
3,1
The magnitude of an earthquake is how _____.
much damage it does
long it lasts
fast its waves travel
big or strong it is
Which statement is FALSE about tectonic plates?
They fit together like puzzle pieces.
They have very specific movements.
They make up the earth's crust.
They sit on top of a fluid part of earth's interior.
The movement of the ground due to rock breaking below the surface during an earthquake is known as _____.
seismic activity
ground heave
subsidence
settlement
Why do earthquakes occur?
Atmospheric pressure
Stress builds up around fault lines
Climate change
Hurricanes
What can you expect to happen after experiencing an earthquake?
You can assume that geologists will be able to predict it.
You should expect to feel foreshocks.
You should expect to feel aftershocks.
You can assume that there will be no more earthquakes.
How does fire danger increase during earthquakes?
Cities cannot afford enough firefighters to put them out.
Cities cannot afford enough firefighters to stop them.
Fallen debris can be flammable, & electrical wiring.
There is not enough water available during large earthquakes
A _____ is a machine that produces (a) _____.
primary wave, secondary wave
seismogram, seismograph
seismograph, body wave
seismograph, seismogram
Where is the epicenter of an earthquake found?
Underground, where the rock is breaking.
Underground, below the focus.
About a mile away from the focus.
Above ground, directly above the focus.
Identify how liquefaction occurs during an earthquake.
Liquefaction occurs when ground shaking loosens moist soil
Liquefaction occurs when a large ocean wave comes onto land.
Liquefaction describes an effect such as ripples in a pond
Liquefaction occurs when the ground shaking loosens rock
Why can geologists not predict earthquakes?
Earthquakes depend on the weather, which is unpredictable.
Foreshocks often don't register on seismographs.
Earthquakes are man made, not natural.
Activities along fault lines are unpredictable.
The elastic rebound theory explains how:
Ground shaking causes faults to slip.
Body waves travel faster than surface waves.
The epicenter is directly above the focus.
Fault slipping causes ground shaking.
The point underground where the earthquake occurs is called the:
Aftershock
Focus
Epicenter
Foreshock
The seismic waves that do most of the shaking are:
Rayleigh
Primary
Love
Body
How does a magnitude 4 earthquake differ from a magnitude 8 earthquake in regard to 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
The magnitude 8 earthquake has 1,024 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
What does the Richter scale measure?
The number of houses that are damaged
The amount of ground shaking and energy of a volcano
The amount of ground shaking and energy released.
The time and location an earthquake
Tsunamis are caused by earthquakes that occur _____.
in the plains
in the mountains
underwater
in the Earth's core
P-waves travel as _____ waves while S-waves travel as _____ waves.
compressional, transverse
horizontal, compressional
horizontal, transverse
transverse, compressional
What are the characteristics of an earthquake that make it so damaging?
Earthquakes occur with little or no warning.
Cities can't afford to rebuild right away.
Many cities do not have enough first responders.
Landslides and mudslides caused by earthquakes.
An earthquake of Richter magnitude _____ produces 100 times more ground shaking than an earthquake of magnitude _____?
3,1
3,2
2,3
3,4
Which of the following choices describes a tsunami?
A huge sea wave resembling a large rising tide.
Buildings and roads on the Earth's surface that are shaken
A portion of the ground that loosens and slides downhill
The shaking of the ground that liquefies water based soil