| A | B |
|---|
| wave | regular disturbance that carries energy |
| mechanical wave | reqiure matter to carry energy |
| water wave | is a mechanical wave |
| electromagnetic wave | do not require matter and can travel through space |
| radio wave | is an electromagnetic wave |
| transverse wave | matter moves back and forth at right angles (water waves) |
| compressional wave | matter in the medium moves forward and backward (sound wave) |
| crest | highest point on a transverse wave |
| trough | lowest point on a transverse wave |
| compression | occurs when particles in a wave are squeezed together |
| rarefaction | occurs when the particles in a wave move apart or spread out |
