Your breath is substantially colder than the outside air... when your warm breath suddenly is immersed in that cold air, it forms condensation.
When the air is cold outside, you can see your breath as a smokey wisp in front of you. This is because your breath is warmer than the surrounding air.
by the temperature outside
When you exhale in cold weather, the warm air from your lungs meets the cold air outside, causing it to condense and form tiny water droplets. This results in the white cloud that you see when you breathe out in cold weather.
One of the respiratory purposes of the mouth is to warm and moisten the air for the lungs to draw the oxygen out of it. That's the reason why even when it is very cold outside, you can see your breath, because the warm moisture is "frozen" (basically).
When you exhale in cold weather, the warm air from your lungs meets the cold air outside and condenses into tiny water droplets. This condensation creates the visible cloud or mist that you see when you breathe out in the cold.
By the saliva in your mouth? Look at your breath on a cold day outside. Breathe on a mirror and watch it fog.
Go outside when its very very cold or snowing. Or stand in a walk in freezer after drinking somehting really hot and breathe.
You see your breath on a cold day because when you exhale, the warm air from your lungs meets the cold air outside. This causes the water vapor in your breath to condense into tiny droplets, making it visible as mist or fog.
A good experiment to try, when it's really cold outside, is to buy a bottle of bubbles. Blow the bubbles outside and see what happens to them.
Breathing out cold air when it's cold outside is due to the warm air inside your body meeting the cold air outside, causing the moisture in your breath to condense and become visible. The same phenomenon occurs when warm, moist air is exhaled in colder temperatures, making it look like you are breathing out "cold air."
the "smoke" is always there when you breathe in the morning, when its cold, you see like a mist, that what that is, its just you usually cant see it
When someone have cold then he is not able to get enough oxygen to his lungs so that's why its difficult to breathe