| A | B |
|---|
| Mechanical wave | Disturbance in matter that carries energy from one place to another |
| Medium | Material through which a wave travels |
| Vibration | A repeated back nd forth motion |
| Transverse wave | Medium vibrates at right angles to energy flow |
| Longitudinal wave | Medium vibrates in same direction as energy flow |
| Surface wave | Wave travels along the interface of two separating media |
| Periodic motion | Motion that repeats at regular time intervals |
| Frequency | Number of complete cycles in a given time period |
| Hertz (Hz) | A unit for frequency |
| Wavelength | The distance between two crests of a wave |
| Amplitude | The maximum displacement of a point on the wave from the rest position |
| Reflection | A wave bounces off a surface |
| Refraction | The bending of a wave as it passes into a different medium |
| Diffraction | The bending of a wave as it passes through a narrow opening |
| Interference | Two or more waves overlap and combine together |
| Standing wave | A wave that appears to stay in one place |
| Loudness | Related to intensity |
| Pitch | Related to frequency |
| Sonar | used for underwater ranging |
| Doppler effect | Apparent change in frequecy due to relative motion between sound source and listener. |
