Science vocab words

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Across
  1. 5. transfer of energy of a wave to matter
  2. 7. a device that amplifies light
  3. 10. does not require a medium
  4. 12. number of waves passed in a amount of time
  5. 15. distance between crest and peak
Down
  1. 1. definite relative to the direction of propagation
  2. 2. time to complete one cycle of a phenomenon
  3. 3. moves parallel
  4. 4. the bending of waves
  5. 6. can be seen by the human eye
  6. 8. The greatest distance in particles
  7. 9. the bouncing back or change in a direction of a wave after it strikes a barrier
  8. 11. sprial arms
  9. 13. the bending of a wave as it passes from one material to another
  10. 14. moves perpendicularly