Sound is created when objects…
Change color
Vibrate
Melt
Rotate
The unit used to measure frequency is…
Decibel
Watt
Hertz
Ohm
High-frequency sounds are perceived as…
Loud
Sharp
Deep
Silent
What type of wave is sound?
Longitudinal
Transverse
Electromagnetic
Radioactive
The speed of sound is fastest in…
Air
Water
Vacuum
Solids
The pitch of a sound depends on…
Amplitude
Frequency
Distance
Temperature
The maximum safe noise level for humans (long exposure) is around…
20 dB
60 dB
85 dB
150 dB
What part of the ear contains tiny hair cells that detect vibrations?
Eardrum
Cochlea
Ossicles
Ear canal
Noise pollution commonly comes from…
Birds chirping
Wind blowing
Traffic and machines
Whispering
When two sound waves overlap and amplify each other, it is called…
Diffusion
Destructive interference
Constructive interference
Compression
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