P-waves travel as _____ waves while S-waves travel as _____ waves.
compressional, transverse
horizontal, compressional
horizontal, transverse
transverse, compressional
What can you expect to happen after experiencing an earthquake?
You should expect to feel aftershocks.
You can assume that geologists will be able to predict it.
You should expect to feel foreshocks.
You can assume that there will be no more earthquakes.
An earthquake of Richter magnitude _____ produces 100 times more ground shaking than an earthquake of magnitude _____?
2,3
3,1
3,4
3,2
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.
Where is the epicenter of an earthquake found?
Underground, below the focus.
About a mile away from the focus.
Above ground, directly above the focus.
Underground, where the rock is breaking.
Which statement is FALSE about tectonic plates?
They sit on top of a fluid part of earth's interior.
They make up the earth's crust.
They fit together like puzzle pieces.
They have very specific movements.
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
Why can geologists not predict earthquakes?
Activities along fault lines are unpredictable.
Earthquakes are man made, not natural.
Foreshocks often don't register on seismographs.
Earthquakes depend on the weather, which is unpredictable.
The point underground where the earthquake occurs is called the:
Focus
Aftershock
Epicenter
Foreshock
What does it mean to say that the Richter scale is logarithmic?
There is a ten-fold decrease for each step
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
The movement of the ground due to rock breaking below the surface during an earthquake is known as _____.
subsidence
seismic activity
settlement
ground heave
A _____ is a machine that produces (a) _____.
seismograph, body wave
primary wave, secondary wave
seismograph, seismogram
seismogram, seismograph
Why do earthquakes occur?
Stress builds up around fault lines
Climate change
Atmospheric pressure
Hurricanes
Identify how liquefaction occurs during an earthquake.
Liquefaction describes an effect such as ripples in a pond
Liquefaction occurs when ground shaking loosens moist soil
Liquefaction occurs when the ground shaking loosens rock
Liquefaction occurs when a large ocean wave comes onto land.
An earthquake of Richter magnitude _____ produces 100 times more ground shaking than an earthquake of magnitude _____?
3,4
2,3
3,2
3,1
The seismic waves that do most of the shaking are:
Primary
Rayleigh
Body
Love
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.
Tsunamis are caused by earthquakes that occur _____.
underwater
in the mountains
in the Earth's core
in the plains
The magnitude of an earthquake is how _____.
long it lasts
much damage it does
fast its waves travel
big or strong it is
What does the Richter scale measure?
The time and location an earthquake
The amount of ground shaking and energy of a volcano
The amount of ground shaking and energy released.
The number of houses that are damaged
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.
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 128 times the energy
he magnitude 8 earthquake has 32,768 times energy
The magnitude 8 earthquake has 1,024 times the energy