Mechanical vs. Electromagnetic Waves

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Across
  1. 2. all EM waves travel at the ______ of light (186,000 miles per sec)
  2. 7. what waves transfer
  3. 9. waves that have particles that vibrate horizontally, like sound waves
  4. 10. when a wave bounces off a surface at an equal angle
  5. 11. when a wave is taken in by a surface
  6. 13. the only part of the EM spectrum we can see is _____ light
  7. 14. if a wave has a short wavelength, it is ________ energy
  8. 15. if a wave has a long wavelength, it is _____ energy
  9. 16. type of electromagnetic wave with the shortest wavelength and most energy
  10. 18. wave in which particles vibrate up and down
Down
  1. 1. type of wave that needs a medium to travel
  2. 3. waves that can travel through empty space
  3. 4. distance from crest to crest or trough to trough
  4. 5. when a wave bends as it passes through two different mediums
  5. 6. when a wave travels through something
  6. 8. type of electromagnetic wave with the longest wave and lowest energy
  7. 11. height of a wave from the rest position
  8. 12. EM waves that we use for cell phones, wifi, bluetooth, and heating food
  9. 17. any solid, liquid, or gas matter that mechanical waves go through