| A | B |
|---|
| amplitude | measures the energy of a transverse wave |
| wavelength | length of a single wave cycle (horizontal arrow double sided arrow) |
| frequency | shorten the waveelngth increase the frequency; cycles per second |
| period | the time for a particle to make one complete vibrational cycle |
| crest | the topmost part of a wave |
| transverse wave | disturbance is perpendicular to the wave |
| longitudinal wave | disturbance travels in the same direction as the wave |
| trough | the bottommost part of the wave |
| rarefaction | A decrease in density and pressure in a medium, such as air, caused by the passage of a sound wave; part after the compression in a sound wave (stretch). |
| Hertz | the measurement of the cycles per second |
