| A | B |
|---|
| Mechanical wave | a type of wave that can only travel through matter |
| transverse wave | a type of wave in which the wave energy causes matter in the medium to move up and down or back and forth in which the wave travels |
| compressional wave | wave in which matter in the medium moves forward and backward along the direction in which the wave travels |
| electromagnetic wave | waves that can travel through matter or empty space |
| amplitude | 1/2 the distance between the crest and trough |
| wavelength | rhythmic disturbance that carries energy but not matter |
| frequency | number of wavelengths that pass a given point in one second |
| reflection | occurs when a wave strikes an object or surface and bounces off |
| refraction | bending of a wave as it moves from one medium into another |
| echolocation | using reflected sound waves to locate an object |
| decibels | what we measure sound waves in |
| loudness | measured in decibels |
| pitch | how high or low a sound is |
| echo | a reflected sound wave |
| Doppler effect | change in frequency of a sound wave that occurs when the sound source and listener move in relation to each other |
| hertz | what we measure frequency in |
| diffraction | bending of light waves around a barrier |
| reflection | wave strikes surface and bounces off |
| refraction | waves bend when they move into a new medium |
| auditory nerve | sound travels along to the brain |
