Sound

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Across
  1. 2. the material through which a wave travels
  2. 7. particles move perpendicularly to the direction the wave travels
  3. 10. a longitudinal wave that is caused by vibrations and travels through the medium
  4. 11. particles move back and forth in the same direction that the wave travels, or parallel to the wave
  5. 12. the speed at which a wave travels
  6. 14. a reflected sound wave
  7. 15. the time required for one cycle
  8. 18. the distance from any point on a wave to an identical point on the next wave?
  9. 19. a change in the observed frequency of a wave when the sound source, the observer, or both are moving
  10. 21. how high or low you think a sound is
Down
  1. 1. a measure of how well a sound can be heard
  2. 3. wave that requires a medium through which to travel
  3. 4. a disturbance in electric and magnetic fields
  4. 5. when a sound wave matches the natural frequency of an object and causes the object to vibrate
  5. 6. a disturbance that transfers energy from one place to another
  6. 8. the use of echoes, or reflected sound waves to find objects
  7. 9. when two or more waves overlap and combine to form one wave
  8. 13. the most common unit used to express loudness
  9. 16. frequency is expressed in
  10. 17. a measure of how far the particles in the medium move away from their normal rest position
  11. 20. is a wave that tells how many cycles occur in an amount of time usually 1 s