Sound Crossword Puzzle

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Across
  1. 2. Hard, ________ surfaces reflect sound waves better than soft or rough surfaces.
  2. 4. When an object ____________, it causes the particles to ___________ too.
  3. 7. The ____________ the frequency the higher the pitch.
  4. 9. As wavelength ______________, frequency increases.
  5. 12. Sound waves travel fastest through this type of matter.
  6. 13. In a sound wave this determines how loud a sound is.
  7. 14. A space with no matter.
  8. 17. When sound waves pass through a material.
  9. 18. An echo is a _____________ of a sound wave.
  10. 20. The place in a sound wave where particles are spead apart
Down
  1. 1. The place in a sound wave where particles are pushed together.
  2. 3. When sound energy gets absorbed it gets converted into ______.
  3. 5. When a material takes in sound energy.
  4. 6. Any matter that sound waves can travel through.
  5. 8. The ___________ the amplitude the louder the sound.
  6. 10. Recording studios have ___________ on the walls to prevent echoes.
  7. 11. Sound waves travel slowest through this type of matter.
  8. 15. Sound travels fastest through solids because their particles are ________.
  9. 16. The type of communication that astronauts have to use.
  10. 19. In a sound wave this determines the pitch.