Science Projects for Kids: States of Matter

Cloud in a Bottle

Make a little weather of your own with a cloud in a bottle. Clouds form when warm, particle-rich air meets cool, moist air. This science project for kids on states of matter can help you understand just how the process works.

What You'll Need:

  • Table
  • Candle
  • Match
  • Clear glass two-liter bottle

Step 1: On a cool day with little or no wind, head for your backyard and find a table.

Step 2: Have a child light a candle, with help from an adult.

Step 3: Turn the two-liter glass bottle upside down, and hold the candle inside the mouth of the jar for about 10 seconds. Don't use a plastic jar. The mouth of a plastic jug could melt.

Step 4: Once the bottle's mouth has cooled a little, form a seal around the bottle with your mouth and blow. Once you pull your mouth away, you should see a cloud form inside the bottle -- just like in the skies above your home.

Learn about surface tension on the next page, and have fun blowing bubbles of different shapes and sizes.

For more fun science projects for kids, check out: