Basic facts Why Earthquakes happen Seismic Waves Scales Things about earthquakes
100
What is constant movement of the earth's plates.
This causes earthquakes
100
True
The first motion of an earthquake occurs at the focus.
100
What is p-waves
The fastest moving waves
100
What is small earthquake
A foreshock
100
What is epicenter
The point on the surface nearest the earthquake
200
What is the elastic rebound theory
This releases of stress during an earthquake
200
Earthquake
Vibrations in Earth that are caused by the sudden movement of rock
200
What is true
S-waves travel through solids only
200
What is true
The Moment Magnitude scale is used to measure a large earthquake.
200
Stored elastic energy in bent rock
The immediate energy source for earthquakes.
300
What is a slip
The amount of ground displacement in a earthquake is called the _________ .
300
Magnitude
The measure of the strength of an earthquake
300
What is p-waves
Type of seismic waves can travel through solids, liquids and gases
300
What is seismograph
An instrument that detects and measures earthquakes
300
8.6
The strongest magnitude earthquake ever measured on the Richter scale
400
What is yes
The ground always shakes during a earthquake
400
What is Move to an open area free of buildings and obstacles.
In case of evacuation announcement
400
What is shadow zone
The area where no direct seismic waves from a particular earthquake can be detected
400
Indian Ocean English Canal The Ring of Fire Mid-Atlantic Ridge
This area is responsible for 90% of all earthquakes in the world and contains numerous faults:
400
Along faults
Most earthquakes occur
500
What is yes
The first earthquake is usually the most powerful
500
What is epicenter
The location on the surface directly above the earthquake focus
500
What is the speed and direction of seismic waves
The composition of Earth's interior effects
500
What is Mercalli Scale
This scale is used to measure the intensity of an earthquake
500
High winds
following is not associated with earthquake destruction






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