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Science 8

8th Grade Science Course Vocab

A reflected sound wave Echo
The ability of a material to bounce back after being disturbed Elasticity
How much matter, or mass, there is in a given amount of space, or volume Density
The amount of energy a sound wave carries per second through a unit area Intensity
The loudness of different sounds is compared using this unit Decibel
The description of how high or low a sound seems to a person Pitch
The normal human range of hearing Ultrasound
Sounds with frequencies below the human range of hearing Infrasound
Known as your voice box and where your vocal cords are located Larynx
The change in frequency of a wave as its source move in relation to an observer Doppler Effect
What causes the Doppler Effect? When a sound source moves, the frequency of the wave changes because the motion of the source adds to the motion of the waves.
What causes a Sonic Boom? When a shock wave releases a huge amount of energy
The lowest natural frequency of an object Fundamental Tone
The object's higher natural frequencies Overtone
The study of how sound interacts with each other and the environment Acoustics
Sound waves reflect back and forth off the hard surfaces Reverberations
It collects sound waves and directs them into a narrow region Ear Canal
Small, tightly, stretched, drum like membrane Eardrum
A fluid-filled cavity shaped like a snail shell Cochlea
The used of reflected sound waves to determine distances or to locate objects Echolocation
A system that uses reflected sound waves to detect and locate objects underwater Sonar
The device uses the reflected ultrasound waves to create a picture Sonogram
Created by: TsylorGwinn