| A | B |
|---|
| vibration | rapid back and forth movement |
| sound | energy created by vibrating matter |
| wavelength | distance between two sound waves |
| frequency | how quickly a sound wave vibrates |
| pitch | describes how high or low a sound is |
| drum | creates sound with a vibrating surface |
| flute | creates sound with vibrating air |
| saxophone | creates sound with vibrating reeds |
| solid | sound moves fastest through |
| gas | sound moves slowest through |
| matter | all sound needs matter to move through. |
| reflection | the bouncing off of sound waves from a hard surface. |
| absorption | disappearance of a sound wave into a surface |
| echo | a reflected sound that is heard |
| echolocation | used by many animals to travel and catch prey |
| sonar | uses sound waves to find distance between objects |
