Set your bubble solution bucket in an open area.Tie the end of the twine together (the knot can be anywhere). Cut a three-foot length of twine and thread it through one washer and each screw eye, making a loop.Ask your adult helper to help you attach a screw eye to one end of each rod.(Try to avoid creating a sudsy foam on the surface of the solution.) If you’re making your own bubble solution, combine all ingredients in your bucket and gently stir to combine. Pour the bubble solution into your bucket. From this point forward everything should be done outside! This activity could get a little messy.One-half cup liquid dish soap (Blue Dawn works well.).Bubble solution (Optional make-your-own bubble solution ingredients are listed below.)īubble Solution (Makes approximately one-half gallon.).Yarn or baker's twine (at least 18 feet).Two screw eyes (a closed loop with a threaded base).Two dowel rods (At least half an inch diameter works best.).Decreasing the strength of the attraction between water molecules lowers the surface tension of the bubble solution, allowing bubbles to form! If you think again about magnets, when two magnets are very close to each other, the pull between them is much stronger than when you slowly separate them. It does this by creating space between the water molecules, decreasing the strength of their attraction to one another. Adding soap or detergent lowers the water’s surface tension, allowing bubbles to form. The surface tension of water is so strong in fact, that it prevents us from blowing bubbles from just water. The strength of that attraction helps hold the water droplet together. These water droplets can hold their shape because water molecules are more attracted to one another than they are to the wax paper. Instead of splashing or flattening, the water will form small, spherical droplets on the paper. If you drop a small amount of water on a piece of wax paper, you can see a great example of surface tension in action. This surface tension allows the surface of water to act like an elastic membrane, stretching and holding a shape. Water molecules like to cling to one another and, just like magnets line up with and attach to other magnets they’re attracted to, water molecules line up with one another and form hydrogen bonds, creating surface tension. Have you ever tried to blow a bubble, and no matter how hard you try-that bubble just won’t form? Why does this happen? Why do bubbles form at all? And why is it harder to blow bubbles sometimes? In this activity we’re going to explore how bubbles form, and test the limits of how big our bubbles can get!Īs you may know, bubbles rely on surface tension to hold together.
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