| A | B |
|---|
| waves | regular disturbances that carry energy from place to place |
| volume | how loud or how soft a sound is |
| visible light | the only part of the electromagnetic spectrum seen by the human eye |
| vibration | a back and forth or side to side motion |
| transparent | allows light to pass through easily |
| translucent | allows some light to pass through |
| spectrum | band of colors into which white light is seperated according to wavelength |
| refraction | bending of light waves when they change speed while passing from one material to another |
| prism | an object of transparent material with three straight faces at an angle which refracts light |
| pitch | how high or how low a sound is |
| opaque | does not allow any light to pass through |
| frequency | the number of vibrations per second of an alternating current, electromagnetic radiation, or sound |
| echo | the repetition of a sound made when the sound waves reflect from a distant surface |
| auditory nerve | the nerve that carries nerve impulses from inner ear to the brain |
| cochlea | tube of the inner ear, shaped like a snail |
