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I Haven't the Foggiest Idea!

Fog in a Bottle

It's so easy …

1. Fill a large jar or wide-mouthed bottle to the top with hot water (you may want to get a parent or teacher to help you with this part).
2. Pour most of the water out, except for an inch (25mm) or so on the bottom.
3. Set a strainer over the mouth of the jar, and put ice cubes in the strainer.

Before long, the cold air from the ice cubes will cause the water to condense from the warm, moist air in the bottle forming … you guessed it … fog!