| A | B |
|---|
| Vibrations cause | sound |
| To make sound | something has to be moving |
| sound waves travel | in all directions |
| sound waves start | where the vibration is produced |
| sound travels better and faster | through a solid because the molecules are closer together |
| sound travels at the speed of | 1,100 feet per second |
| Why do you see lightning before you hear thunder | because sound travels slower than light |
| Sound can be absorbed by | soft materials |
| Sound can be | reflected |
| When sound is reflected off of something and comes back to your ear it is called | echo |
| the highness or lowness of a sound is its | pitch |
| the loudness or softness of a sound is its | volume |
| As the vibrations of an object increase in strength the sound gets | louder |
| A person with a small chest will have a | soft voice because there is less matter to vibrate |
| A person with a large chest will have a | loud voice because there is more matter to vibrate |
| rooms built with special tiles with holes in them | absorb the sound |
