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    				| 1. | The condition of the air or Atmosphere on different parts of the planet | 
| Answer» Explanation: The atmosphere contains ROUGHLY 78% nitrogen and 21% oxygen 0.97% ARGON and carbon dioxide 0.04% trace amounts of other gases, and WATER vapor. This mixture of gases is commonly known as air. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and reducing temperature EXTREMES between day and night. | |