Earthquakes!

A seismic wave ...

• vibrates perpendicular to the direction that. theenergy moves

• spreads out in all directions from the focus point

• is the height of a wave from its crest to its midpoint.

• is the point where the particles are closest together

The movements of particles by waves are called...

• seismic wave

• vibrations

• amplitude

• earthquakes

A vibration that travels through Earth and is produced by an earthquake is called a...

• earthquake

• transverse wave

• vibration

• seismic wave

_________ is the distance between wave crests or troughs

A seismograph is used to __________ and ______________ earthquakes.

• start, stop

• detect, record

• record, stop

• detect, alert

the height of a wave from its crest or trough to its midpoint is called

• magnitude

• vibration

• latteral

• amplitude

The highest point of an ocean wave is called a _______.

• trough

• vibrations

• crest

• amplitude

The ______ scale measures magnitude.

What does a water splash have to do with earthquakes?

• they produce sound

• they produce speed

• they produce waves

A ____________ moves material up and down as they travel.