| 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 |
