Causes
Seismic Waves
Measurement
Miscellaneous
100
When the force on rocks is great enough, they break producing vibrations called
What is earthquakes
100
The most destructive seismic wave
What are surface waves
100
The magnitude of an earthquake is measured by
What is the Richter scale
100
Seismic sea waves
What is a tsunami
200
Once the elastic limit of rocks is passed, they break and move along surfaces called
What are faults
200
After an earthquake, these waves reach the seismograph first
What are primary waves
200
The Mercalli Scale describes the ____________ of an earthquakes amount of damage in a specific location
What is intensity
200
People who study earthquakes
What is a seismologist
300
The force that squeezes rocks together is called
What is compression
300
How many seismographs are needed to accurately locate an earthquake epicenter
What is three
300
How many seismographs are needed to accurately locate an earthquake's epicenter
What is three
300
A paper record of a seismic event
What is a seismogram
400
The force that pulls rocks apart
What is tension
400
What is the point in Earth's interior where the energy release of an earthquake occurs
What is the focus
400
The point on Earth's surface directly above an earthquake's focus
What is the epicenter
400
Instruments that record seismic activity
What is a seismograph
500
Force that causes plates to move sideways past each other
What is shear
500
S-waves are called
What is secondary waves
500
Most earthquakes happen
without warning along plate boundaries in areas where earthquakes have occurred in the past
500
Largest layer of the Earth
What is the crust
M
e
n
u