Words of the Day: Earthquakes

Words of the Day-Monday

StressEarthquakeFault

WOD: Definitions Fault- fracture in Earth’s lithosphere

along which blocks of rock move past each other.

Stress- force applied by an object pressing on, pulling on, or pushing against another object.

Earthquake- shaking of the ground caused by sudden movement of large blocks of rocks along faults.

Words of the Day- Tuesday

Seismic WavesFocusEpicenter

WOD: DefinitionsSeismic Wave- vibrations caused by EQ.

Focus- point underground where an EQ begins. Directly below the epicenter.

Epicenter- point on Earth’s surface directly above the focus of an EQ.

Words of the Day

AftershockLiquefactionTsunami

WOD: Definitions

Aftershock- a smaller EQ that follows a more powerful EQ in the same area.

Liquefaction- process in which shaking of the ground causes loose, wet soil to act like a liquid.

Tsunami- large water wave caused by an EQ, volcanic eruption, or landslide.

Word of the Day- Thursday

Moment Magnitude

WOD: Definition

Moment Magnitude- the total energy put out by an EQ.

Words of the Day

Shadow ZoneLag-timeSeismogramSeismograph

WOD: Definitions Shadow zone- the areas where P-waves &

S-waves do not arrive.

Lag-time- period between the arrival of P-waves and S-waves.

Seismogram- the recording made by a seismograph as it records seismic waves.

Seismograph- instrument that constantly records ground movement. (Its recording looks like wiggles in a line)

WOD: Definitions_____________- vibrations caused by EQ.

Focus- point ____________ where an EQ ___________. Directly below the ___________.

Epicenter- point on Earth’s surface directly ________the focus of an EQ.

WOD: Definitions

Aftershock- a ________ EQ that follows a more powerful EQ in the ___________________.

_______________- process in which shaking of the ground causes loose, wet soil to act like a liquid.

Tsunami- large _________________caused by an EQ, volcanic eruption, or _____________.

WOD: Definition

__________ Magnitude- the total _________ put out by an EQ.

WOD: Definitions Shadow zone- the areas where P-waves & S-

waves ___________________arrive.

______________- period between the arrival of P-waves and S-waves.

Seismogram- the ____________made by a seismograph as it records ___________ waves.

Seismograph- ___________ that constantly records ________________ movement. (Its recording looks like _______________ in a line)

WOD: Definitions Fault- ____________in Earth’s ______________

along which blocks of ___________ move past each other.

Stress- force applied by an object _________ on, ___________ on, or ____________ against another object.

Earthquake- ___________ of the ground caused by _____________ movement of large blocks of rocks along _______________.