Navigators

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Across
  1. 2. to travel through. Cannot travel through the
  2. 3. To bounce back.
  3. 5. The ability to do work or cause change.
  4. 8. An energy that travels in waves and need a
  5. 9. of space.
  6. 10. Material through which waves travels.
  7. 12. A rapid back and forth movement.
  8. 13. To take in or soak up.
Down
  1. 1. The highness or lowness of a sound.
  2. 4. The number of vibrations per second.
  3. 6. A reflected sound wave.
  4. 7. The loudness of sound.
  5. 11. To send out, to give forth.