On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.

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Solution

Exhaling:
The act of exhaling involves removing the lungs' carbon dioxide-rich air.
The air leaving the lungs is warm and moist due to the partial presence of the body's heart and the water vapor that also leaves the body with the air.
Summertime temperatures are warm, and since the exhaled air is the same temperature as the outside air, there is no smoke formed.
When it comes to winter, the temperature is lower, and as a result, warm and moist air condenses when it comes into touch with the outside, cold air, producing white smoke.

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