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Science chpt 13
Sound
Term | Definition |
---|---|
The unit for measuring frequency is a(an)_____________ | hertz |
An echo is caused by a(an)____________________ | reflection |
A sound starts with a(an)__________________ | vibration |
Loudness is measured in a unit called a(an)_____________ | decibel |
Overtones affect the _________________ of a sound | quality |
A sound travels as a(an)___________________ | vibration |
A reflected sound is called a(an)____________ | echo |
Sound tends not to bounce off carpets because of ____________ | absorption |
When molecules bunch together, that's the _________ stage of a sound wave | compression |
When molecules spread apart, that's the ___________ stage of a sound wave. | rarefaction |
If the frequency of a musical note is increased, ______________ | the note gets higher |
Echoes are the result of _______________ | reflection |
The two parts of a sound wave are ___________ and ____________ | compression and rarefaction |
The changing pitch of a moving siren is caused by ______________ | the Doppler effect |
Two differences we hear in sounds are ___________ and _____________ | pitch and quality |