science

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Across
  1. 1. longitudinal wave that is caused by vibrations and travels through a medium
  2. 4. a measure of how far the particles in the medium move from their normal rest position
  3. 5. measure of how well a sound can be heard
  4. 6. unit used to express loudness
  5. 7. the time required for one cycle of waves
  6. 8. a wave that requires a medium to travel
  7. 10. tells how many waves occur in an amount of time
  8. 13. particles move perpendicularly to the direction the wave travels
  9. 16. particles move back and forth in the same direction that the wave travels
  10. 17. a disturbance that transfers energy from one place to another
  11. 18. a reflected sound wave
  12. 20. the material through which a wave travels
Down
  1. 2. distance from any point on a wave to an identical point on the next wave
  2. 3. uses of echoes to find objects
  3. 9. a disturbance in electric and magnetic fields
  4. 11. the speed at which a wave travels
  5. 12. what frequency is expressed in
  6. 14. happens when a sound wave matches a natural frequency of an object
  7. 15. sound waves that have frequencies greater than 20,000 hertz
  8. 19. how high or low you think a sound is