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MJHS8 Quakes

MJHS8 Earthquake Vocabulary

QuestionAnswer
Large ocean wave caused by an undersea earthquake Tsunami
Shaking and trembling caused by movement of Earth’s crust Earthquake
A break or crack in the Earth’s crust Fault
Force that acts on rock to change its shape or volume Stress
A measurement of earthquake strength Magnitude
Shaking of ground causes soil and water to make liquid mud Liquefaction
Stress that pushes pieces of crust in opposite directions Shearing
Stress that stretches or pulls pieces of crust apart Tension
Stress that pushes or squeezes crust together Compression
Fault caused by compression; hanging wall moves up foot wall Reverse fault
Fault caused by tension; hanging wall moves down foot wall Normal fault
Fault caused by shearing; rocks on either side slide past each other Strike-slip fault
Records ground movements caused by P and S waves Seismograph
Fastest earthquake waves; cause ground to move up and down P waves
Earthquake waves that cause ground to move side to side S waves
Formed after P and S waves reach Earth’s surface Surface waves
Block of rock that lies above a fault Hanging wall
Block of rock that lies below a fault Foot wall
Earthquake that occurs after a larger earthquake Aftershock
Any change in the shape or volume of the Earth’s crust or surface Deformation
Point beneath Earth’s surface where earthquake begins Focus
Point on the Earth’s surface directly above the focus Epicenter
Vibrations caused by energy released during an earthquake Seismic waves
Rating of the total energy released by a quake; good for all sizes Moment magnitude scale
Rating of the size of seismic waves; good for small, local earthquakes Richter scale
Created by: aaron.blake
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