Across
- 4. the topmost layer of the soil.
- 8. fixing of atmospheric nitrogen into nitrogen compounds.
- 9. conversion of water vapour to liquid.
- 10. movement of air from one region to another.
- 14. form of nitrogen which can be used up by plants
- 15. cycle An constant interaction between biotic and a biotic components of the atmosphere which creates a dynamic but a stable system
- 16. conversion of nitrogen compounds from dead and decaying organisms into ammonia.
- 18. presence of high level of pollutants which reduces visibilty.
- 19. substance released by plants during photosynthesis for performing various activities
- 20. increase in content of these harmful gases in the atmosphere which slow down the release of heat leads to a process.
- 21. gas which depletes ozone layer.
- 23. presence of harmful substance in the air
- 25. chemical compounds having hydrogen and carbon
Down
- 1. converts atmospheric nitrogen into ammonia.
- 2. precipitation which occurs with the addition of nitrogen and sulphur components.
- 3. the harmful radiations from sun which the ozone layer protects from reaching us.
- 5. at night both land and sea starts to cool. since water cools down slower than the land the air above water would be warmer than the air above land.
- 6. the process by which plants make their food.
- 7. three atoms of oxygen
- 11. gas present in atmosphere with 78% abundance0
- 12. the process by which fine particles of soil maybe carried away by mostly flowing water or wind.
- 13. nitrifying bacteria which helps in nitrogen fixation.
- 17. loss of water vapour by plants
- 22. blanket covering the earth.
- 24. the outer crust of the earth.