Science Year 9

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Across
  1. 2. the collision between Earth and a planet formed ________
  2. 3. depends on the frequency of wave
  3. 6. the nursery for young stars
  4. 7. when two waves meet with crest and trough
  5. 8. depends on the amplitude of the wave
  6. 12. when two wave meets with crest and crest
  7. 13. clouds of dust and gas in space
  8. 14. one of the common gas in nebula
Down
  1. 1. maximum distance travelled by the vibrating particle
  2. 4. the planet collided with Earth
  3. 5. a device used to display the waveform
  4. 9. the current caused by the movement of mantle
  5. 10. the lowest point of the graph
  6. 11. the top of the graph