Waves crossword year 8

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Across
  1. 4. When light changes direction as it enters an object.
  2. 5. The height of a wave.
  3. 7. A type of lens.
  4. 9. A long type of EM wave.
  5. 11. Something that reflects light very well.
  6. 14. A type of EM wave smaller than red.
  7. 16. A type of EM wave greater than violet.
  8. 17. How often a wave happens.
  9. 19. A spectrum of visible and invisible light.
  10. 20. Glass that is used to focus light.
Down
  1. 1. When light bounces off of an object.
  2. 2. A high frequency EM wave.
  3. 3. How energy moves from one place to another.
  4. 6. A type of wave.
  5. 8. A type of radio wave.
  6. 10. A type of wave.
  7. 12. Something that travels in transverse waves.
  8. 13. The length of a wave.
  9. 15. Something that travels in longitudinal waves.
  10. 18. All waves move this from one place to another.