Kids Science Experiments - Steaming Up
Matter Experiment
Steaming Up
Materials you will need:
• Your hot breath
• A mirror or windowSteps:
1. Take a deep breath.
2. Get real close to the mirror or window with your mouth.
3. Open your mouth and exhale your hot breath onto the mirror or window.What has happened to the mirror or window?
It has steamed up or you could call it condensation. Why do things steam up? If you breathe on a mirror or window, it will steam up. Your breath contains water –although you can’t see it. The water is a type of gas, called a vapor, which is mixed with the air. When the water vapor from your breath hits the cold mirror or window, some of it turns into a liquid. Thousands of tiny droplets of water form on the mirror or window, and this is called condensation or steam. You may have seen steam or condensation in the kitchen, the bathroom or in a car on a cold day.
You can see this steam or condensation in mid-air when you watch a kettle or a pan of water boil. Hot water vapors are given off by the water. The vapor cools when it meets cooler air and then turns into tiny (dew) drops, which forms the steam or condensation.
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