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Wave 6th
| Amplitude | half the height of the wave from the crest to the trough |
| crest | top of wave |
| frequency | number of waves during a set time period |
| transverse wave | matter in the medium moves at a right angle to the direction of the wave |
| trough | lowest part of the wave |
| wave length | distance from one point on a wave tot he identical point on the next wave |
| longitudinal wave | energy moves forward along the wave |
| vibrations | back and forth movement of matter |
| pitch | perceived frequency of a sound |
| decibel | unit used to measure loudness |
| hertz | unit used to measure frequency |
| compression | compressed part of the longitudinal wave |
| intereference | addition and subtraction of wave crests and troughs |
| medium | material needed to transfer sound |
| rarefaction | expanded part of longitudinal wave |
| displacement | difference in current position and previous position |