MONKEY PUZZLE

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Across
  1. 3. moves parallel to the direction of the wave
  2. 8. does not need a medium to travel trough
  3. 10. the distance between the normal/midline and
  4. 11. substance a wave travels trough
  5. 12. moves perpendicular to the direction of the
Down
  1. 1. a set amount of time usually secods
  2. 2. distance a wave has traveled before beginning
  3. 4. had to have a medium to travel trough sound
  4. 5. number of waves that pass a neasurement device
  5. 6. the low point of a wave
  6. 7. something that comes energy from one place to
  7. 9. the high point of a wave