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8th Grade Unit 3b
Sound waves part 2
Term | Definition |
---|---|
Mach I | An object reaches this point when it breaks the sound barrier |
Medium | A substance that sound can travel through |
Middle ear | The part of the ear that contains the ossicles (ear bones) |
Outer ear | The part of the ear that receives sound input from the outside world |
P wave | Primary compression wave that occurs during an earthquake |
Pitch | The high or low effect of sound based on frequency |
Rarefaction | The decompression of a compression wave |
S wave | The transverse wave associated with an Earthquake |
Seismograph | An instrument that records seismic waves |
Sonic Boom | The release of a massive sound wave that occurs when an object breaks the sound barrier |
Sound barrier | The point at which an object exceeds the speed of sound |
Sound wave | A compression wave that carries energy to a natural or artificial device that can detect pressure changes |
Speed of sound | 343.2 meters per second or 1,126 ft/s. This is equivalent to 1,236 kilometers per hour or 768 mph |