Why Can You See Your Breath When It’s Cold Outside?

Brrr! It’s getting cold outside. Some days, you might be able to see your breath.

You breathe out. A cloud forms! What’s happening?  

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Your breath is warm and moist. It has different gases. You cannot see these gases. One gas is water vapor [the gas form of water].

When water vapor is cooled, it turns into a liquid.

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You breathe out. Your breath hits the cool air. Tiny drops of water form in the air. You can see them. Clouds form in the same way.

What Do You Think? How could you show that your breath contains water vapor?

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