crossword science: physics

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Across
  1. 2. What is the wave period measured in?
  2. 6. What is the fastest wave in the universe
  3. 8. What is something that sound does to the air?
  4. 13. What is the type of wave that sounds travel with?
  5. 15. What is the lowest type of wave? (they usually are 2 words)
  6. 16. What is the 3d lowest type of wave?
  7. 18. What is the pushy type of wave?
  8. 19. What is the wave that goes up and down?
Down
  1. 1. What is wavelength measured in?
  2. 3. What is a wave that can travel through vacuum?
  3. 4. What is the snail looking thing in our ear
  4. 5. What is the 3rd highest wave?
  5. 7. What ii the 2nd lowest type of wave?
  6. 9. What a ear bone name?
  7. 10. What is the 2nd highest wave?
  8. 11. What is the musical instrument in our ear?
  9. 12. What is frequency measured in?
  10. 14. What is the highest type of wave?(usually are 2 words as well)
  11. 17. What is another way of saying the outer ear?
  12. 20. What is something that we can hear?