Dry ice, the solid form of carbon dioxide, is a super fun and accessible way to play around with the physics of cold materials. In this experiment, we use dry ice to create self-filling fog bubbles. See how big you can make your bubble, then pop it and watch the fog cascade across your table! Follow along with the video tutorial, and learn about some other cool variations as well!
Let's first make our bubble solution. Pour some water into a cup and then squirt in some dish soap or bubble concentrate. Stir these two together with a craft stick or spoon. You won't need very much!
Next, take your funnel, and press it into the end of your plastic tubing. If you'd like, you can now test your bubble solution. Stick the end of the tubing in your soap solution, and blow into the funnel- a bubble should form.
We cut off the top of the bottle to make the process of dropping the dry ice in the bottle a little easier. Before you cut, make sure that the funnel can still completely cover the opening of the bottle! Once the bottle is cut, fill it halfway with warm water.
Use your gloved hand to put a few pieces of dry ice into your bottle. You'll see the water start to bubble and fog start to form!
Remember that dry ice is 109.3 degrees fahrenheit, so don't touch it with your bare hands!
We're ready to blow bubbles! Dip the end of the tubing into the soap solution and then place the other end with the funnel on top of the bottle. A foggy bubble should form on the soapy end of the tube!