Waves Crossword Puzzle

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Across
  1. 2. Same angle as the Angle of Incidence, but in a different direction
  2. 6. The distance a wave travels in a given amount of time
  3. 9. Highest point on a wave
  4. 10. Waves that need a medium
  5. 15. Waves that don’t need a medium
  6. 17. When waves bend as they enter a new medium at an angle
  7. 18. The distance from one point on a wave to an identical point on the next wave
  8. 20. A substance through which a wave can travel
Down
  1. 1. Angle that a wave hits a surface
  2. 3. When waves bounce back from a surface that they cannot pass through
  3. 4. Waves that appear to be standing still when waves are reflected straight back from an obstacle
  4. 5. The particles of the medium vibrate parallel to the direction the wave moves
  5. 7. The part of the longitudinal wave where the particles are crowded
  6. 8. The particles of the medium move perpendicular to the direction the wave is traveling
  7. 11. The number of waves that pass a fixed point in a given amount of time
  8. 12. Where particles are spread apart
  9. 13. SI unit for wave frequency
  10. 14. The maximum distance the particles of the medium from their resting positions when a wave passes through
  11. 16. Waves can spread out and travel around obstacles through openings in obstacles
  12. 19. Lowest point on a wave