science week class vi-viii

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Across
  1. 3. A huge cluster of stars(6)
  2. 4. Fastest animal on earth(7)
  3. 6. First page of a website (8)
  4. 9. First artificial satellite(7)
  5. 11. Biggest planet on the solar system(7)
  6. 13. Reusing the resource to make something new(9)
  7. 17. An optical instrument used to see heavenly bodies(9)
  8. 19. King of chemicals(13)
  9. 23. A set of instructions to execute a particular task(7)
  10. 25. Study of weather(11)
  11. 27. One animal which is immune to all diseases(5)
  12. 28. Largest flower(9)
  13. 29. Software available to download files from internet(10)
Down
  1. 1. Fuel which causes less pollution(3)
  2. 2. Crystal used to keep time in modern watches(6)
  3. 5. A vehicle which can run both on land and water with equal ease(10)
  4. 7. Study of insects(10)
  5. 8. Air contains highest percentage of this gas(8)
  6. 10. The hardest rock (7)
  7. 12. Contains millions of websites(8)
  8. 14. Component of cars for achieving variable speed(4)
  9. 15. Person who treats skin(13)
  10. 16. Paper is made from this natural polymer(9)
  11. 18. Inventor of electric light bulb(6)
  12. 20. The rays used by TV remotes(8)
  13. 21. Script used by visually impaired people to read and write(7)
  14. 22. Person who writes programs(10)
  15. 24. The device used for counting(6)
  16. 25. Device to connect computer to internet(5)
  17. 26. Animal capable of staying without water for longer stretches than a camel(3)
  18. 29. An extinct bird(4)
  19. 30. A computer antivirus(6)