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Sound Waves

Science Vocabulary Terms

TermDefinition
Vibration A back-and-fourth motion.
Sound Wave A vibration that spreads away from a vibrating object.
Compression The part of a sound wave where the molecules are crowded together.
Rarefaction The part of a sound wave where molecules are spread apart.
Hertz A unit for measuring frequency.
Decibel A unit that measures loudness.
Reflection The bouncing of a sound wave off of a surface.
Absorption The disappearance of a sound wave into a surface.
Echo A reflected sound wave.
Resonance In an instrument or object, a unique blend of fundamental frequency and its overtones. When an external force vibrates at the same frequency, a build up of that resonance can occur.
Matter Anything that has mass and takes up space.
Pitch How high or low a sound is.
Frequency The number of times an object vibrates per second.
Echolocation Finding an object using reflected sound.
Doppler Effect The change in frequency (and pitch) as a source of sound moves toward or away from you.
Quality The difference you hear between two sounds of the same loudness and pitch.
Overtones One of a series of pitches that blend to give a sound its quality.
Volume The loudness or softness of a sound.
Created by: legarwood