| A | B |
|---|
| Transverse wave | Wave propagates perpendicular to direction of motion |
| Longitudinal wave | Wave propagates parallel to direction of motion |
| Compression | A region of high pressure |
| Rarefaction | A region of low pressure |
| Oscillation | Regular, repetitive motion |
| Progressive wave | A wave that moves away from the source |
| Pure waves | A wave that has regular oscillations |
| Irregular wave | A wave that does not have repetitive oscillations |
