CBSE Class IX Sound Waves CW 02

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Across
  1. 1. Region completely devoid of matter.
  2. 3. Shape assumed by sound waves emitted from a point source.
  3. 5. Physical quantity that increases in compressions and decreases in rarefactions.
  4. 9. Type of wave in which particles vibrate perpendicular to wave propagation.
  5. 10. Process by which sound travels from one place to another.
  6. 11. Region in a sound wave where particles are farther apart.
  7. 12. Material through which sound travels.
Down
  1. 2. Category of waves that require a material medium for transmission.
  2. 4. Type of wave in which particles vibrate parallel to the direction of propagation.
  3. 5. Change that travels through a medium carrying energy.
  4. 6. Instrument used to detect earthquake waves.
  5. 7. Relative orientation of particle vibration in a sound wave.
  6. 8. Region in a sound wave where particles are crowded together.