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Waves words
Vocab words for physical science unit on waves sound and light
| Question | Answer |
|---|---|
| wave | a disturbance that transfers energy |
| medium | any substance that a wave moves through |
| mechanical wave | a wave that transfers energy through a medium |
| transverse wave | a wave that moves perpendicular to the force that creates it |
| longitudinal wave | a wave that travels in the same direction as the force that creates it |
| crest | the highest point of a wave, the peak |
| trough | the lowest point of a wave, the valley |
| amplitude | the height of a wave measured from the mid point of the wave to the crest or trough |
| wavelength | the distance between one wave crest the next or from one wave trough to the next |
| frequency | the number of wave that travel past a fixed point in a given amount of time. (Ex. 2 waves per second) |
| wave speed | speed = wavelength X frequency |
| reflection | when a wave bounces back after striking a barrier |
| refraction | when waves bend after entering a medium of a different density |
| diffraction | when a wave spreads around an opening in a barrier |
| Interference | when a wave meets and combines with another wave |
| Constructive interference | when two waves meet and combine to form a larger wave (crest to crest and trough to trough) |
| destructive interference | when two waves combine and subtract from each other (crests to troughs) |
| sound | a wave that is produced by a vibrating object and is transferred through matter |
| vibration | rapid back-and-forth motion |
| vaccuum | |
| sound | a longitudinal wave that is produced by a vibrating object |
| vibration | a rapid back and forth motion |
| vacuum | empty space with few or no particles |
| pitch | highness or lowness of a sound |
| hertz (Hz) | unit for measuring the frequency of a wave. 1Hz=one cycle per second. |
| ultrasound | sound frequencies above the levels a human can hear. (20,000 Hz) |
| infrasound | sound frequencies below the levels a human can hear. (20Hz) |
| resonance | the strengthening of a sound wave wen it combines with the natural vibration of an obect. |
| Doppler Effect | the change in perceived pitch due the movement of a sound source. |
| intensity | the energy a sound wave has |
| decibel (dB) | the unit used to measure the intensity of a wave |
| amplification | the increasing of the strength of an electrical signal that is often used to increase the intensity of a sound. |
| acoustics | the scientific study of sound |
| echolocation | sending out ultrasound waves and interpreting the returning echoes |
| sonar | instruments that use echolocation to locate objects. |
Created by:
amatlack
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