physics

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Across
  1. 3. The main speed at which something likes to vibrate Rarefaction - Where air or particles are spread out in a sound wave
  2. 5. How high or low a sound is
  3. 6. When two or more waves are added together
  4. 8. Sounds that are too high for people to hear
  5. 9. Extra sounds that happen at whole number multiples of the main frequency
  6. 11. A place in a wave where nothing moves
  7. 13. Moving much faster than the speed of sound, at least five times faster
  8. 14. The sound you hear when two notes are almost the same but not exactly
  9. 15. The unit we use to measure how loud a sound is
  10. 16. When two waves meet and change each other
  11. 18. A place in a wave where movement is the biggest
  12. 19. The change in sound you hear when something moves past you
  13. 20. Something moves because another thing shakes it
Down
  1. 1. A wave that looks like it is not moving
  2. 2. When something vibrates a lot because it gets energy at its favorite speed
  3. 4. When two waves meet and make a bigger wave
  4. 7. When two waves meet and make a smaller wave
  5. 10. Sounds that are too low for people to hear
  6. 12. How many times faster something is than sound
  7. 17. Where air or particles are pushed close together in a sound wave