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Physical Science: Sound
NAME_______________________________________
1.
PERIOD________
How does sound travel through the air to your ear?
(Choose only one answer)
as a decibel
as a sound wave
in the gaps in the air
from one molecule of air to another
2. What happens in the cochlea?
(Choose only one answer)
Sound waves are picked up from eardrum.
Vibrations from sound are sent back into the air.
Sound waves are picked up from the auditory nerve.
Vibrations from sound are converted to electrical signals.
3. In a patient with a cochlear implant, a microphone attached near the ear receives signals in the form of _____.
(Choose only one answer)
sound waves
rhythm waves
musical signals
electrical signals
4.
A cochlear implant restores hearing completely in all people.
true
false
5. Our hearing is damaged over time by frequently _____.
(Choose only one answer)
listening to music
wearing ear plugs
hearing loud sounds
using anti-noise systems
6. The unit of measurement for the volume of sound is the _____.
(Choose only one answer)
hertz
decibel
frequency
wavelength
7. An anti-noise system reduces noise through _____.
(Choose only one answer)
listening to music
wearing ear plugs
hearing sound waves
canceling out sound waves
8. Sound is produced when a person strikes the keys of a piano because hammers hit strings in the piano, causing them to
_____.
(Choose only one answer)
echo
tune
jump
vibrate
9.
Infrasound travels farther than the higher-frequency sound that humans can hear.
true
false
10. What process do bats use to navigate?
(Choose only one answer)
infrasound
polarization
echolocation
anti-noise technology
Discussion Questions
• What is sound and how does it travel?
• Describe how the human ear processes sound.
• How does a cochlear implant help a deaf person hear?
• How is sound measured?
• What is one way that noises can be “cancelled”?
• What part of a piano amplifies the sound of the vibrating strings?
• Name at least two animals that use sounds humans can’t hear to communicate or navigate.
• What are infrasounds, and how do elephants use them?
• Explain how bats use high-frequency sounds to navigate and find food.