| A | B |
|---|
| Wave | any disturbance that transmits energy through matter or space |
| Medium | a substance through which a wave can travel |
| Mechanical | type of wave that require a medium |
| Electromagnetic | type of wave that does not require a medium |
| Transverse | type of wave in which the particles vibrate with an up-and-down motion, perpendicular to the direction in which the wave is traveling |
| Crest | highest point of a transverse wave |
| Trough | lowest point between each crest of a transverse wave |
| Longitudinal | type of wave in which the particles move back and forth along the path that the wave travels |
| Compression | a section of a longitudinal wave where the particles are crowded together |
| Rarefaction | a section of a longitudinal wave where the particles are less crowded |
| Surface | type of a combination wave |
