| A | B |
|---|
| wave | a disturbance that travels through matter or space |
| medium | the material through which the wave travels |
| transverse wave | moves at right angles to the moving particles of the medium |
| compression | a region where particles of a medium are close together |
| longitudinal wave | a wave that moves along the same direction as the moving particiles of the medium |
| rarefactions | when the particles of the medium are spread apart |
| crest | high point of a wave |
| trough | low point of a wave |
| wavelength | distance from crest to crest |
| frequency | the number of waves produced each second |
| hertz | one wave per second |
| amplitude | distance from crest to normal postion of the medium |
