click below
click below
Normal Size Small Size show me how
swift chpt 6.2
chpt 6.2
Question | Answer |
---|---|
earthquake | the shaking that results from the movement of rock under Earth's surface |
focus | the point beneath Earth's surface where rock breaks under stress and causes an earthquake |
epicenter | the point on Earth's surface directly above the focus |
p wave | a type of seismic wave that compresses an expands the ground |
s wave | a type of seismic wave the moves the ground up and down or side to side |
surface wave | a type of seismic wave that forms when p waves and s waves reach the surface |
Mercalli scale | a scale that rates earthquakes by their intensity and how much damage they cause on a particular place |
magnitude | the measurement of an earthquakes strength based on seismic waves and movement along faults |
Richter scale | a scale that rates an earthquakes magnitude based on the size of its seismic waves |
seismograph | a device that records ground movements caused by seismic waves as they move through Earth |
moment magnitude scale | a scale that rates earthquakes by estimating the total energy released by and earthquake |