How to Make a Cloud in a Bottle

Make a cloud in a bottle to show kids how water vapor creates a cloud. With adult supervision, kids can perform this experiment using only a 2-liter bottle, some warm water and a match. It's fun to learn hands-on!

Difficulty: Moderately Easy

Instructions

Things You'll Need:

• Water
• Clear plastic bottle
• Matches

1. Pour some hot water into a 2-liter bottle. Put about 2 inches of water in.

2. Blow into the bottle. Place your mouth over the bottle opening and blow to make sure the bottle is fully expanded.

3. Seal the bottle tightly with the cap.

4. Shake the bottle vigorously for one minute.

5. Light a match. Let it burn for two seconds.

6. Drop the match into the bottle. Unscrew the lid, drop the burning match in and screw the bottle shut again quickly.

7. Place the bottle on its side. Lay it on some black paper so you can see.

8. Push down on the bottle for 10 seconds. Push hard, so the bottle compresses.

9. Release. Look into the bottle. If a cloud has not formed, push again and release.

10. Open the bottle. Once the cloud has formed, open the bottle to release the cloud. Squeeze the bottle a little bit to coax your fluffy friend into the atmosphere.

Tips & Warnings

• Clear plastic bottles work the best.
• Get a strong bottle so it won't burst or break when you push on it.
• Always have parental supervision while using matches.