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| Q. |
Which gas does not form the part, of atmosphere? |
| A. | Nitrogen |
| B. | Helium |
| C. | Chlorine |
| D. | None of the above |
| Answer» C. Chlorine | |
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Explanation: The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth's gravity. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night (the diurnal temperature variations). Air is the name given to the atmosphere used in breathing and photosynthesis. |
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