Model Earthquake Movement Flashcards
Earthquakes produce
Waves
A disturbance that transfers energy from one point to another.
Wave
Earthquakes produce waves that ripple ________ from the place where the disturbance ________.
Outward, begins
The sudden movement of an earthquake causes rocks to __________.
Vibrate
A vibration that travels through the Earth and is produced by an earthquake is called…..
A seismic wave
Seismic waves spread out in all directions from the _____, the point where the earthquake begins.
Focus
The movement of particles by waves
Vibration
Waves are classified by…
The type of vibration they cause in materials.
_________ waves, such as sound waves, move material back and forth as the waves travel through it.
Longitudinal
A wave that vibrates perpendicular to the direction that the energy moves.
Transverse wave
Transverse waves move material ______ and ________ as they travel.
Up and down
Earthquakes produce both ___________ and __________ waves.
Longitudinal and transverse
HIGHEST point of a transverse wave.
Crest
LOWEST point of a transverse wave.
Trough
In a longitudinal wave - this is the point where the particles are closest together.
Crest
In a longitudinal wave - this is the point where the particles are furthest apart.
Trough
Distance between and crest and trough
Wavelength
The measure of how many crests or troughs move through a given point in one unit of time.
Frequency
True or False: the frequency and speed of a wave are the same.
False.
The ________ of a wave depends on the material through which it travels.
Speed
The height of a wave from its crest or trough to its midpoint.
Amplitude.
Measure of a wave’s strength.
Amplitude
Scientist measure seismic waves with this device. This device or instrument is used to detect and record earthquakes.
Seismograph
The seismograph shows waves as ________ lines.
Curvy
True/False - The weaker the quake, the steeper the lines.
False
The amount of energy released by an earthquake.
Magnitude
