| A | B |
| reflection | when a wave strikes an object and bounces off |
| waves | repeating disturbances that transfer energy through matter or space |
| crest | highest point of a transverse wave |
| compression | region where the medium is crowded and dense in a longitudinal wave |
| transverse wave | wave that makes matter in the medium move back and forth at right angles to the direction the wave travels |
| interference | ability of two or more waves to combine and form a new wave |
| trough | lowest point of a transverse wave |
| medium | material through which a wave transfers energy |
| diffraction | the bending of waves around a barrier |
| rarefraction | less dense region of a longitudinal wave |
| resonance | ability of an object to vibrate by absorbing energy at its natural frequency |
| compressiolnal wave | wave in which matter in the medium moves back and forth in the same direction the wave travels |
| wavelength | distance between one point in a wae and the nearest point just like it |
| frequency | measure of how many wavelength pass a fixed point each second |
| law of reflection | the angle of inicdence is equal to the angle of reflection |
| amplitude | measure of the energy in a wave |
| standing wave | a special type of wave pattern that forms when waves of equal wavelength and amplitude traveling in opposite directions continuously interfere with each other |
| refraction | the bending of a wave caused by a change in its speed as it moves from one medium to another |