Waves Crossword by Ms. Scott

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Across
  1. 4. waves bounce off an object and return to their origin
  2. 6. waves pass through an object
  3. 9. protection of the eye
  4. 10. eye color
Down
  1. 1. object "soaks up" wave energy.
  2. 2. number of wavelengths per second
  3. 3. the only part of the electromagnetic spectrum that humans can see with a naked eye
  4. 5. top of a wave
  5. 7. bottom of a wave
  6. 8. forms images and focus light