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11 Cards in this Set

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Earthquake
shaking and trembling that results from the sudden movement of part of the earth’s crust.
Tsunamis
giant sea wave produced by an earthquake. Tsunamis can travel at speeds of 700-899 kilos per hour. Heights of a tsunamis can get up to 20 meters high.
Focus
underground point of origin of an earthquake.
Epicenter
point on the earth’s surface directly above the focus of an earthquake.
Seismic Wave
shock wave produced by earthquakes that travels through the earth.
Primary Waves
the push-pull seismic wave that can travel through solids, liquids and gases. “P” waves are the fastest type of seismic wave.
Secondary Waves
a side-to-side earthquake wave which can travel through solids but not through liquids and gases. They are slower than “P” waves but faster than “L” waves.
Surface (L) Waves
Up-and –down earthquake wave. “L” waves are the slowest moving seismic waves.
Seismograph
instrument used to detect and record seismic waves produced by earthquakes.
Seismogram
record of seismic waves recorded by a seismograph.
Richter Scale
scale used to measure the strength of earthquakes.