Directions: Circle the term that best completes the sentence.
1. The unit of radiant energy is the (photon, proton, electron).
2. Television video signals are sent by (frequency, amplitude, digital) modulation.
3. The ozone layer protects us from too much (ultraviolet, infrared, microwave) radiation.
4. As the wavelength of an electromagnetic wave decreases, its frequency (increases, decreases,
remains the same).
5. As the frequency of an electromagnetic wave decreases, its energy (increases, decreases,
remains the same).
6. Cell phones use (ultraviolet, infrared, (radio) waves to transmit information.
7. Electromagnetic waves carry (force, energy, sound).
8. FM radio wave frequencies are (higher than, lower than, the same as) AM waves.
9. To track a hurricane, meteorologists use (maser, sonar, radar).
10. When gamma rays pass through living tissue, they damage (molecules, electrons, atoms).
11. Each color of visible light has a different (amplitude, intensity, wavelength).