| A | B |
|---|
| reflection | a wave can bounce off and go in a new direction |
| refraction | a wave can pass straight into and through an obstacle |
| diffraction | a wave can bend around or through openings in an obstacle |
| absorption | a wave can be absorbed and disappear |
| crest | the highest point of a transverse wave |
| trough | the lowest point of a transverse wave |
| mechanical wave | a wave that moves through a medium |
| hertz | unit of measurement for frequency |
| amplitude | the distance a wave rises or falls from its equilibrium |
| equilibrium | this describes when the wave is at rest |
| wave | a disturbance that moves energy along a medium from one end to the other. |
| medium | what a wave travels through |
| transverse wave | the medium moves at a right angle to the direction of the wave |
| compressional/longitudinal wave | the medium vibrates back and forth in the same direction as the wave |
| wavelength | the distance between two wave crests or two wave troughs |
