Have you ever wondered about the science behind bubbles? Why do some last a long time and others pop right away? Why does soap form bubbles? The answer: surface tension. Pure water bubbles tend to pop quickly because the surface tension of water is so strong. You can observe surface tension when a cup is filled to the brim and the water forms a dome on top or by the curved edge of a spilled droplet. Water also evaporates quickly, which makes bubbles weaker as they lose their water content. Soapy water makes for great bubbles because it has a lower surface tension and a lower evaporation rate. Experiment with different kinds of bubbles in this project and see which ones last the longest.
Supplies
- Soap
- Water
- Empty plastic bottle
- Scissors
- Washcloth or single sock
- Rubber band
- Bowl
Instructions
Step 1: Cut off the bottom of your bottle. Ask an adult for help if needed!
Step 2: Place your washcloth over the end of the bottle and secure it with a rubber band. If you’re using a sock, pull it over the bottle and fold the extra fabric back.
Step 3: Prepare your bubble mixture of soap and water. You do not need a lot of liquid, just enough to cover the bottom of your bowl.
Step 4: Dip the cloth end of your bottle into the mixture. Once wet, remove and blow into the mouth of the bottle.
Step 5: Enjoy your foamy bubble blobs! See how long of a chain you can get and try to make the longest-lasting bubbles.
Explore more of our #PEMfromHome Drop-in Art Activity video tutorials on our YouTube channel.
Show Us!
We want to see your bubble bottles. Share your photos online using #PEMpod or #peabodyessex