SOUND

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Across
  1. 4. without matter, there would be __ sound.
  2. 5. volume is measured in ______.
  3. 6. _______ is the height of the sound wave.
  4. 7. sound travels slowest through ___.
  5. 9. short strings produce ______ sounds.
  6. 10. sound can't travel in a ______.
  7. 11. ______ is the number of waves passing through a point in a given amount of time.
  8. 15. the lower the decibel, the ______ the sound.
  9. 17. the _______ the amplitude, the louder the sound.
  10. 19. back and forth motion.
Down
  1. 1. sound needs a _______ to travel through.
  2. 2. sound moves quickly through ______.
  3. 3. smooth, hard, flat surfaces _______ sound.
  4. 6. soft, irregular surfaces ______ sound.
  5. 8. vocal cords can _______.
  6. 12. spread out molecules in a wave are called ________.
  7. 13. close together molecules are called ______.
  8. 14. Light travels faster than _____.
  9. 16. sound travels in __________ waves.
  10. 18. sound is _____.