science

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