Sound Waves
Measuring Sound
Sound Moves
Human Sounds
This and That
100
In order for sound to occur, this must be present.
What is matter?
100
This term refers to the number of waves that occur during a second.
What is frequency?
100
What happens when a sound wave hits a soft surface
What is absorption?
100
Sound is created when air passes through a hollow organ at the top of the windpipe.
What is larynx or voice box?
100
Two animals that use echolocation
What are bats and whales [and/or porpoises]?
200
In a sound wave, this is an area of tightly packed molecules.
What is compression?
200
The instrument that measures the number of sound waves per second.
What is an oscilloscope?
200
The term used to describe when a sound wave hits a hard surface and bounces back
What is reflection?
200
Two straight elastic-like strings responsible for making sound
What are vocal chords?
200
This animal makes the loudest sound at 188 decibels
What is a blue whale?
300
In a sound wave, this is an area of loosely packed molecules.
What is rarefaction?
300
The distance between two compressions of a sound wave
What is a wavelength?
300
If you were to shout down from the top of the Grand Canyon, you would hear the sound of your voice come back to you.
What is an echo?
300
Sounds are heard by these structures
What are ears?
300
A means of communication by humans using dots and dashes, first developed for use of the telegraph in the 1840s
What is Morse code?
400
This is the rapid back-and-forth motion of molecules.
What is vibration?
400
The unit by which loudness is measured
What is decibel?
400
The state of matter in which sound is transmitted slowest
What is a gas?
400
The sound frequency above which humans cannot hear
What is ultrasonic?
400
What ships and submarines use to detect and locate underwater objects
What is SONAR?
500
These can be compared to ripples that spread out in every direction when a pebble is tossed in a pool of water.
What sound waves.
500
The unit by which the highs and lows of sound are measured
What is hertz?
500
A place where no sound can occur
What is space [or a vacuum]?
500
This scientist set up the first central electric power plant.
What/who is: Thomas Edison?
500
The apparent change in the length of a sound wave caused by the motion of the source of sound, heard as a change of pitch [think ambulance]
What is the Doppler effect?
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