Sound Waves and Hearing-Make a Crossword Puzzel

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Across
  1. 4. The maximum extent of a vibration or oscillation
  2. 7. A wave whose oscillations are perpendicular to the direction of the wave
  3. 10. The net effect of the combination of two or more wave trains moving on an intersecting path
  4. 12. A material that allows the movement of energy and waves to pass. It can be a solid, liquid, or gas
  5. 13. A region in a longitudinal wave where particles are the closest together​
  6. 14. A wave that vibrates parallel to the direction of the wave
  7. 17. When a wave is reflected, the angle of reflection is equal to the angle of incidence​
  8. 18. The top-most point of a transverse wave
  9. 20. The change in the direction of a wave between different mediums​
Down
  1. 1. The transfer of energy of a wave to the medium that it is travelling through​
  2. 2. The region in a longitudinal wave where the particles are the farthest apart​
  3. 3. The distance of corresponding points between two consecutive waves
  4. 5. Waves that require a medium to travel through
  5. 6. When a wave passes through a given point or medium
  6. 8. The process of light bending around an obstacle or spreading out after travelling through a small slit
  7. 9. Waves that do not require a medium to travel through
  8. 11. The bending of waves and change in speed due to the change in one medium to another
  9. 15. The number of waves that pass through a certain point in a given time frame
  10. 16. A vibration or disturbance that can travel through space or a medium
  11. 19. The lowest point of a transverse wave