Vocabulary
Sound Speed
Multiple Choice
Fill in the Blank
Random
100
Unit used to measure frequency
hertz
100
It took the sound 3 seconds to return. How deep was the ocean?
2,250 m
100
Name the 3 bones in the human ear
Stirrup Hammer Anvil
100
The ____________ directs sound waves into the ear.
outer ear
100
The speed of sound depends on what
the closeness of molecules
200
Number of times an object vibrates per second
frequency
200
It took the sound 5 seconds to return. How deep was the ocean?
3,750 m
200
How fast sound travels depends on what
How close the molecules of the substance are to each other
200
Sound vibrations reach the brain through the _________
auditory nerve
200
Sound waves are created by
vibrations
300
how high or low a sound is
pitch
300
It took the sound 9 seconds to return. How deep was the ocean?
6,750 m
300
All sound is created by what
Vibrations
300
Blank recording tapes are coated with scrambled ___________ particles.
magnetic
300
what do you need to have a good echo
a good reflective surface
400
Unit for measuring loudness
decibel
400
It took the sound 14 seconds to return. How deep was the ocean?
10,500 m
400
The number of times an object vibrates per second is its what
frequency
400
A _______ surface absorbs more sound than a hard surface.
soft
400
What makes up a cassette tape?
Magnetic particles
500
Explain the difference between compression and rarefaction
Compression is when the molecules are crowded together Rarefaction is when the molecules are spread apart
500
it took the sound 50 seconds to return. How deep was the ocean?
375,000 m
500
To hear an echo, you must have what
a good reflective surface
500
___________ uses sound waves to detect faraway objects.
Sonar
500
List the 6 steps it takes for the sound waves to travel to the ear
1. outer ear 2. eardrum 3. middle ear 4. fluid 5. auditory nerve 6. brain
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