Class 8

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Across
  1. 5. mass divided by volume
  2. 6. another term for burning
  3. 8. energy is released out
  4. 13. the rainforests of the sea
  5. 14. ozone layer is present in this layer of atmosphere
  6. 18. it can occur below 100 degree C
  7. 19. colourful part of a flower
  8. 20. reaction in which a substance reacts with oxygen
Down
  1. 1. fusion of male and female gametes
  2. 2. it is a nuclear fuel
  3. 3. reaction in which the final temperature decreases
  4. 4. hot air rises up due to this
  5. 7. gas released when metals react with water
  6. 9. energy stored in fossil fuels
  7. 10. scattering seeds away from parents
  8. 11. unit of pressure
  9. 12. it is a type of thermal insulator
  10. 15. study of environment
  11. 16. it can be compressed easily
  12. 17. thread like structures present in fungus