My 9 year old LOVES to learn, understanding how things work and why they happen just fascinates her. When she learned to read she did not want to read any of the books her friends were reading so I thought she did not like to read. That is till I noticed she was taking instruction manuals for her toys to bed and reading them, and cookbooks. We got her a few science books and all of a sudden she would not put the book down… lol. She did not get this from me, she got it from her Daddy. But I am thrilled to have such a smart girl 🙂
So I should not have been surprised when she picked SCIENCE as the theme of her birthday party this year. We did a bunch of fun experiments with the girls and it actually turned out to be one of the most entertaining birthday parties ever.
Magical Moving Milk Experiment
For this experiment you will need:
- whole milk
- pie tin or glass dish
- food coloring
- cotton swab
- liquid hand soap or dish soap
Put the cotton swab into the milk and see that nothing really happens, their is slight movement but nothing to impressive. Take the other end of the cotton swab and coat it with liquid soap. Put the coated cotton swab into the middle of the milk, don’t move it just watch what happens. The milk will magically start to move all on its own. Take it back out, add some more soap and put it in in a different spot. Watch the milk magically whirl and swirl around, it almost looks like a kaleidoscope.
Why does this happen (Explained by Chemistry.about.com)
Milk consists of a lot of different types of molecules, including fat, protein, sugars, vitamins, and minerals. If you had just touched a clean cotton swab to the milk (try it!), not much would have happened. The cotton is absorbent, so you would have created a current in the milk, but you wouldn’t have seen anything especially dramatic happen.
When you introduce detergent to the milk, several things happen at once. The detergent lowers the surface tension of the liquid so that the food coloring is free to flow throughout the milk. The detergent reacts with the protein in the milk, altering the shape of those molecules and setting them in motion. The reaction between the detergent and the fat forms micelles, which is how detergent helps to lift grease off of dirty dishes. As the micelles form, the pigments in the food coloring get pushed around. Eventually equilibrium is reached, but the swirling of the colors continues for quite a while before stopping.
More activities, projects and fun things to do with your kids.
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Make your own Crayons ~ Activities to do with kids
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Wiggle Worm Game ~ Games to do with kids
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Corn Starch Gak Science Project to do with kids
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