ch 21 quiz
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| the complete back and forth motion of an object | vibration
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| what is sound created by? | vibrations
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| a logitudinal wave caused by vibrations and carried through a substance | sound wave
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| sound is transmitted through the --- and --- of particles | vibrations and collisions
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| in what directions do sound waves travel from their source? | all directions
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| a substance through which a wave can travel | medium
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| does sound require a medium? | no
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| study diagram of the ear | study diagram of the ear
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| what does the speed of sound depend on? | the medium it is traveling through
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| cooler medium = --- sound | slower
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| how high or low a sound seems to be | pitch
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| the number of crests or troughs that are made in a given amount of time | frequency
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| are pitch and frequency related? | yes
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| what is the doppler effect? | the apparent change in the frequency of a sound caused by the motion eiether the listener or the source of the sound
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| a measure of how well a sound can be heard | loudness
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| the largest distance the particles in a wave vibrate from their rest postion | amplitude
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| larger amplitude = --- sound | louder
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| what is the unit used to measure sound? | decibel
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| what does an oscilloscope do? | graphs representations of sound waves
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| bouncing back of a wave after it strikes a barrier | reflection
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| what is a reflected sound wave called? | echo
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| what do sounds best reflect off of? | smooth, hard surfaces
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| the process of using reflected sound waves to find objects | echolocation
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| what types of animals use echolocation? | bats, dolphins, abd beluga whales
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| what does SONAR stand for? | sound navigation and ranging
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| what is something that break the sound barrier? | a jet
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| when two or more waves overlap | interference
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| the explosive sound heard when a shock wave reaches your ears | sonic boom
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| a pattern of vibration that looks like a wave that is standing still | standing wave
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| frequencies at which waves are made | resonant frequencies
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| lowest resonant frequecy= | fundemental frequency
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| higher resonant frequencies= | overtones
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| when an object vibration at or near a resonant frquency of a second object causes the second object the vibrate | resonance
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| the result of several pitches mixing together through interference | sound quality
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| what are the 3 types of instruments? | string,wind, and percussion
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| what are the 2 groups of wind instruments? | woodwinds and brass
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| any sound that is a random mix of frequencies | noise
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Created by:
kfran0112
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