Waves

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Across
  1. 4. Distance from the rest to the crest of a wave?
  2. 10. When multiple waves arrive somewhere at the same time?
  3. 11. Highest point in a wave?
  4. 13. What is the only thing that waves carry?
  5. 15. Which waves do not need matter to travel through?
  6. 17. A change in frequency that is caused by the motion of the source or observer.
  7. 19. Bending of waves around an object or barrier?
  8. 20. The horizontal difference between waves?
Down
  1. 1. Surfaces that curve inward?
  2. 2. When multiple waves subtract together?
  3. 3. When multiple waves add up together ?
  4. 5. The substance through which a wave travels?
  5. 6. What do all objects reflect or absorb?
  6. 7. The valley between two waves?
  7. 8. When waves bend due to a change in medium?
  8. 9. Waves that need matter to transfer energy?
  9. 12. What shows us a range of wavelengths and frequencies?
  10. 14. When waves bounce off of a barrier?
  11. 16. Waves that travel between two mediums?
  12. 18. Surfaces that curve outward?