| A | B |
|---|
| movement back and forth which creates sound waves | vibrations |
| carpet can do this to sound waves | absorb |
| apparent change in pitch when the sound doesn't really change | Doppler Effect |
| smaller, shorter items have a ______ pitch | higher |
| distance from a point on one wave to the same point on the next wave | wavelength |
| reflected sound waves | echoes |
| how loud or soft the sound is | intensity |
| sounds over 20,000 hertz | ultrasonic |
| science or study of sound | acoustics |
| instrument used to measure sound | oscilloscope |
| sound waves travel fastest in this | solid |
| number of times an object vibrates per second | frequency |
| absence of air, sound can't travel in one | vacuum |
| the higher the amplitude, the ____ the sound | louder |
| sound is a form of this | energy |
| the highness or lowness of sound | pitch |
| sound is this type of wave | compression wave |
| measurement of frequency | hertz |
| unit used to measure intensity of sound | decibel |
| how sound travels | in waves |
| sound travels slowest in this | gas |
| sound travels slower than this | light |
| amount of energy in a compression wave | amplitude |
| when sound bounces back | reflection |
| when sound bends around an object | diffraction |
| larger, longer objects have a _____pitch | lower |
| part of the sound wave where molecules are spread out | rarefaction |
| part of sound wave where molecules are pressed together | compression |
| what the sound wave travels in | medium |
