Waves

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Across
  1. 4. how often a wave repeats in a given amount of time
  2. 5. a wave whose energy moves parallel
  3. 7. all light passes through
  4. 8. not transferred through a wave
  5. 12. height of a wave
  6. 13. sound travels slowest through this
  7. 15. sound travels slower through this
  8. 18. distance between two equal points on a wave
  9. 19. wave where the energy moves perpendicular
Down
  1. 1. a wave that neeeds some type of matter to travel through
  2. 2. a type of matter; a solid, liquid or gas
  3. 3. lowest point on a wave
  4. 6. highest point on a wave
  5. 9. some light passes through
  6. 10. wave that does not require a medium
  7. 11. a wave that needs a medium
  8. 14. sound travels fastest through this
  9. 16. no light passes through
  10. 17. causes an image to look bent or broken