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PSH Sound Waves Review

The unit is called Sound but it also includes a bunch of stuff about waves and some earthquake terms.
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LudwigDuseldorf
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Last updated: May 19, 2026
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First submittedMay 19, 2026
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Answer
Wave that moves perpendicular to the medium.
Transverse Wave
Wave that moves with the medium, also called Longitudinal Waves.
Compression Waves
What type of wave is an Ocean Wave?
Transverse
What type of wave is a Sound Wave?
Compression
The top of a wave.
Crest
The bottom of a wave, looks like a valley.
Trough
The line that runs down the middle of a Transverse wave.
Median
A measure of how large/severe a wave is.
Amplitude
When decompression occurs in a Compression wave.
Rarefaction
A vibration that carries energy is called a ____.
Wave
Number of Waves per Second, measured in Hz.
Frequency
Number of Seconds per Wave, measured in Secs.
Period
How fast a wave moves.
Wave Velocity
What type of wave is an S wave in an earthquake?
Transverse
What type of wave is a P wave in an earthquake?
Compression
Which do you feel first (Which travels faster)?
P Wave
Which causes more damage?
S Wave
Meathod used to find the epicenter of an earthquake.
Triangulation
Device that measures the severity of earthquakes on a rotating drum.
Seismograph
What is the speed of sound at 0 Degrees C? (m/s)
332 m/s
The brain interpets different frequencies of sounds as different ____.
Pitches
A measure of the amplitude of a sound wave is called ____.
Volume
At how many Decibels does permanent hearing loss start to occur?
90 dB
What is it called when sound waves bounce off an object? (Echo)
Reflection
What is it called when sound waves bend?
Refraction
The frequency at which an object tends to naturally vibrate.
Natural Frequency
When a vibrating object makes another object vibrate (not neccesarily at its natural frequency).
Forced Vibration
When the frequency of one object causes another object to vibrate at its natural frequency.
Resonance
When one object causes another to vibrate at the same frequency.
Sympathetic Vibration
Energy transmitted by wave causes medium to go in opposite directions.
Destructive Interference
Energy transmitted by waves causes the medium to go in the same direction.
Constructive Interference
The point at which the crest and trough of a wave meet and cancel out (Zero Amplitude).
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