Science Why does 'clouds' seem to come out from one's nose and mouth when one is in a very cold place?

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I think describing them as clouds is appropriate. Clouds are formed when droplets form around tiny particles high up in the air and condense into clouds because warm air rises. When you breathe, your air is warmer than the air around you so you are making tiny clouds.
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When you carry out respiration, you are exhaling water vapor and carbon dioxide, which has been in the body and thus it is much warmer than the surrounding air. When it comes in contact with the surrounding air, condensation occurs and a heat exchange occurs between what you've exhaled and the cooler air temperature. This causes the water vapor to become water droplets again, much like when you take a hot shower and someone opens the door, letting in cooler air. You will notice water droplets forming on the walls and mirror due to condensation.

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When you exhale, carbon dioxide and water vapor are breathed out.  If the air you're breathing into is cold, your warm breath meeting the air will condense a bit, so that your exhalations are visible. When the temperature and humidity are low, the air will suck the moisture out of the body, causing thirst and chapped skin.

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