Radio Waves

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Across
  1. 3. The biggest users of radio waves are the _ _ _ _ _ _ _ _.
  2. 7. The most common use of radio waves is _ _ _ _ _ _ _ _ _ _ _ _ _.
  3. 8. James Clerk Maxwell and Heinrich Hertz both contributed to the discovery of radio waves and study _ _ _ _ _ _ _.
  4. 10. The layer of the atmosphere that radio waves reflect off.
  5. 11. WI-Fi and bluetooth both use _ _ _ _ _ _ frequency wave lengths.
  6. 12. Radio waves can be produced naturally by things like _ _ _ _ _.
Down
  1. 1. The opposite of radio waves on the electromagnetic spectrum is _ _ _ _ _ _ _ _ _ _.
  2. 2. Who is the measurement hertz named after?
  3. 4. A radio wave is detected by a _ _ _ _ _ _ _ _.
  4. 5. Radio waves have the _ _ _ _ _ _ _ wavelengths of all the electromagnetic radiation.
  5. 6. Which one sounds better? AM or FM?
  6. 9. Radio waves _ _ _ _ _ _ off anything that encounter.