Vocabulary
The Ear
True or False
Sounds
How Loud?
100
To move back and forth quickly is to
vibrate
100
In the __________, sound waves are changed into signals that travel to the brain.
inner ear
100
TRUE or FALSE. Sounds are caused by vibrations.
TRUE
100
Name 2 ways you, as a person, can make sound.
walking, talking, hitting things together, playing an instrument, tapping.
100
What does a "decibel" measure?
How loud or soft a sound is.
200
The _____________ is the distance between the resting point and a crest or trough.
amplitude
200
The ______________ gathers sound waves from the air and funnels them toward the eardrum.
outer ear
200
TRUE or FALSE. The loudness or softness of a sound is measured in decibels.
TRUE.
200
What is a medium?
Matter sound can travel through. Can be a solid, liquid, or a gas.
200
What is louder, a jet plane at takeoff or thunder?
a jet engine at 140 decibels. (thunder is approximately 120 decibels)
300
The ___________ of the wave is the number of crests or troughs that pass by over a certain amount of time.
frequency
300
In the middle ear, when sound hits the ___________, it vibrates or moves.
eardrum
300
TRUE or FALSE. We observe sound using our eyes.
FALSE. We observe sound using our EARS.
300
Name 2 sounds that might cause noise pollution.
screaming or yelling, automobiles, loud music, planes, construction equipment.
300
What is the risk of your ears being exposed to noises that are too loud?
Temporary or permanent hearing loss
400
What is PITCH?
The highness or lowness of a sound.
400
Name the 3 parts of the ear.
Outer ear, middle ear, and inner ear.
400
TRUE or FALSE. If you shorten the string on an instrument, the pitch becomes lower.
FALSE. If you shorten the string on an instrument, the pitch becomes HIGHER.
400
If an instrument has a low pitch, it will also have a low _____________
frequency
400
At what approximate decibel level is a faint sound or whisper?
20 decibels
500
The distance between one crest or trough to the next is the
wavelength.
500
What tool is used to make a picture of a sound wave?
An oscilloscope
500
TRUE or FALSE. The ear canal sends sound messages to the brain.
FALSE. The AUDITORY NERVES send sound messages to the brain.
500
If you wanted to build something that makes sound, what do you have to think about?
what type of material, what will vibrate, how will the energy be input (blow into, hit, pluck, strum...)
500
What could you use to protect your hearing?
earplugs or mufflers that stop sound
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