science project

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