Match the following characteristics of sound with their descriptions :
| Characteristic of sound | Description |
| a)Compression | 1)Particles vibrate parallel to the direction |
| b) Rarefaction | 2)increased air pressure |
| c) Longitudinal wave | 3)The rate at which sound travels. |
| d) speed of sound | 4) decreased air pressure |
1
a) 2 b) 1 c) 4 d) 3
2
a) 4 b) 3 c) 1 d) 2
3
a) 3 b) 4 c) 1 d) 2
4
a) 2 b) 4 c) 1 d) 3