| A | B |
|---|
| eardrum | thin, skinlike layer that covers the middle part of the ear |
| echo | when sound bounces back from an object |
| nerve | carries messages about sound to the brain |
| pitch | how high or low a sound is |
| vibrate | move quickly back and ofrth |
| vocal cords | two small folds of elastic tissue at the top of the windpipe |
| volume | the loudness or softness of a sound |
| solid | state of matter in which sound travels the fastest |
