| A | B |
|---|
| radio | lowest energy, electromagnetic waves |
| microwave | EM waves that are absorbed by water & oil |
| infrared | EM waves that are absorbed as heat |
| visible_light | ***EM waves that stimulate retinal cells |
| ultraviolet | EM waves that cause sunburn and cancer |
| x-ray | ***high energy EM waves that are used by doctors to see bone tissue |
| gamma | Highest energy EM waves |
| electromagnetic | type of wave that can travel through empty space |
| transverse | type of wave whose energy travels perpendicularly to the wave direction |
| longitudinal | type of wave that is composed of material compression & rarefaction |
| medium | material that transfer energy in mechanical waves |
| vacuum | word that means empty space |
| ozone | O3 |
| thermosphere | atmospheric layer that contains the ionosphere |
| stratosphere | atmospheric layer that contains the ozone layer |
| ionosphere | atmospheric region that reflects short-wave radio transmissions |
| short-wave | ***type of radio transmission that can go around the curvature of the earth |
| crest | top of wave |
| trough | bottom of wave |
| wavelength | length of wave |
| frequency | number of waves passing a point in a given amount of time |
| amplitude | wave height measured from the rest position to the crest |
| sonar | sound navigation and ranging |
| sound | example of a longitudinal wave |
| echo | sound wave that is reflected back by a hard surface |
| insulator | material that inhibits the transmission of sound |
| hertz | unit of measurement for frequency measured in seconds |
| cone | type of retinal cell that perceives color |
