Across
- 4. mass of the sun
- 6. converts chemical energy to electrical
- 8. catalytic convertors are madeup
- 12. the mass of the star is two times
- 17. invented first computer
- 18. hg and na street lamps light up
- 19. snakes,crocodiles are
- 20. type of computer invented by china in
- 21. the substance alter the rate of the
Down
- 1. atomic bombs principle
- 2. jawless animal(shark/myxine)
- 3. most commonly used bleaching powder
- 5. father of chemistry
- 7. collection of rays
- 9. waves used in artificial satellites
- 10. father of taxonomy
- 11. communication
- 13. type of uninersal gate
- 14. type of selection control statement
- 15. type of computer
- 16. biological name for humans
- 19. biological name for hibiscus