| A | B |
|---|
| a wiggle in both space and time | wave |
| sound moves through ________. | material (ex: solid, liquid, or gas) |
| distance from one crest to the next one, or the distance b/w two successive parts of wave | wavelength |
| frequency and period are _________ related. | inversely |
| transverse motion | the direction of the wave is perpendicular to the direction of the vibrating source |
| longitudinal wave | the direction fo the wave travles along the direction in which the source vibrates |
| when the waves are farthest apart is a | rarefaction |
| when the waves are closest together is a | condensation or compression |
| below 20 hz | infrasonic waves |
| above 20,000 hz | ultrasonic waves |
| bending of sound is called | refraction |
| air speed increaes as what increases? | temperature |
| this occurs when a forced vibration of an object matches it's natural frequency | resonance |
| a change in frequency due to the movement of the source is called _______. | the doppler efffect |
