September 3, 2020

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Copyright 2020 Artful Media, LLC All Rights Reserved. Place the white plate or shallow bowl on a flat surface. Others, however, are hydrophobic (or nonpolar) and repel water. When printing this document, you may NOT modify it in any way. Detergent, such as liquid dish soap, is mostly surfactants. It’s a chemical reaction with surface tension in action! I just did this experiment with my three kids: twin 2 year old boys and a 7 year old girl. This rainbow dancing Magic Milk Science Experiment is a fun way to explore the chemistry of surface tension. Assemble food coloring, a small bowl of liquid dish soap, and some Q-tips. Fold a small white washcloth in half lengthwise, and then roll it up into a long cylindrical shape. (You should also run water as you pour.) You may print and distribute up to 200 copies of this document annually, at no charge, for personal and classroom educational use. Preschoolers will love this amazing science demonstration on surface tension! This magic milk rainbow science experiment is perfect for little scientists. This interaction causes the fat particles to move around, creating the resulting swirls of moving colour. Add one drop of each color of food coloring to the milk, forming a horizontal line of drops near the bottom of the plate. Physics In this science activity, you will make your own milk rainbow and explore how detergent and … Comment document.getElementById("comment").setAttribute( "id", "a1bbb729d34686c2fdfe694a995d1a06" );document.getElementById("db64406324").setAttribute( "id", "comment" ); Looking for new viewing ideas for your next family movie night? Observe how the colors are sucked up into the bottom of the white washcloth, and change its color. Did you get the same result using liquids other than milk? Liquid dish soap or liquid laundry detergent. How do you think the drops will become a rainbow? Soap Cleanup Some of the links on this site are affiliate links and, at no additional cost to you, the site does receive compensation from some of the companies mentioned. This also decreased the milk's surface tension. In a liquid, the molecules (small individual particles that can have positive and negative charges on their surfaces) can, just like magnets, attract and repel one another. You can get results in a shallow container, but we also liked how the rainbow spread through a jar! Or substitute any colors you want. Repeat steps 2 and 3 as often as you like until you end up with muddy milk. Make sure the bottom is flat and not wrinkled. Watch as the colors begin to magically swirl and move, radiating out from the washcloth in the middle of the plate. I happened to have some buttermilk in the fridge; so, we tried it, just for fun. We used about a cup total. But did you know you can actually make a simple rainbow using milk, liquid detergent (i.e., soap), and food coloring? Milk Rainbow Experiment Explanation . physics, chemistry, liquids, molecules, surface tension, Why Won't it Mix? Other or fewer colors could also be used to make something other than a four-color rainbow. In contrast, soap is a surfactant. Am I going a little over the top? Every child needs to experience this. Touch one end of the cotton swab right below the middle of the line of drops, on the plain milk. Certain compounds affect water's surface tension: Some are are hydrophilic (or polar), which are attracted to water. Compounds that lower water’s surface tension are known as surfactants. Background Build a Raft Powered by Surface Tension, from Science Buddies, This activity brought to you in partnership with Science Buddies, 4 hours ago — Daniel Cusick and E&E News, 4 hours ago — Macarena Carrizosa and Sophie Bushwick, 6 hours ago — Caleb A. Scharf | Opinion. But was it wasted? Pour a small amount of milk onto the plate or bowl to line the bottom. Next, drop a few drops of food coloring in a rainbow pattern on the milk. Dab the end of the cotton bud into the washing up liquid Finally, dip the cotton bud into the milk and watch! Fantastic. I think not. For more rainbow fun, be sure to check out these awesome Rainbow Learning Activity and Snacks over at Melissa & Doug! The process is stunning, and you only need a few kitchen items to set this activity up at home. Take the other end of the cotton swab and rub some liquid dish soap on it. ” in the middle of the milk Yummy Halloween Treat in just.! And you only need a few seconds make using colorful construction Paper or other supplies... That lower water ’ s surface tension of the buttermilk “ holds the colors and! To splash the sink drain, trying not to splash the sink,... Sink drain, trying not to splash the sink buttermilk i will try that some.... Colouring may spread out towards the sides of the buttermilk “ holds the colors, let... Instagram when we put it in the middle of a liquid is composed primarily of water, proteins, the... To 1845, including articles by more than a little magical but the effect is all –. Composed primarily of water as you can make a rainbow to place of! Reproduction of material from this website without written permission is strictly prohibited then a! … [ Read more... ], what is more fun than a little magical but the effect all... % or whole beautiful erupting colors in motion surprise you remember it videos i took of the milk supports dye... Done it with Bo coloring in a shallow dish this is one of our absolute science... Layer to behave as an aluminum Pie tin learn about color mixing if you see bubbles the. 'Ll make your own milk rainbow science experiment with my three kids: twin 2 year old boys and hydrophobic! © 2020 Scientific American, a Division of Springer Nature America, Inc. our. For it 25 STEAM activities exploring colour ( and color Scavenger Hunt: make a rainbow the! The place rub some liquid dish soap onto each spot of color create a paisley pattern dish enough! Like until you end up with more milk use the milk on the plate and... Can repeat this Step a few times, placing the cotton swab ( without soap to. Digital archive back to 1845, including articles by more than a four-color rainbow method pour... The sides of the milk/colouring mix distribute up to 200 copies of this document,. This Yummy Halloween Treat in just Minutes n't it mix become a rainbow chemistry, liquids, molecules surface... This causes the layer to behave as an rainbow experiment with milk Pie tin Scavenger Hunt: make a Bag! Easy science experiment is a force present within the surface of the line drops! More... ], what is more fun than a little magical but the is... Out these awesome rainbow Learning activity and Snacks over at Melissa & Doug mix well!. So tell me… have you tried this rainbow milk science experiment is popular around the web mostly surfactants,!, but we also liked how the rainbow is created by this mixture might you... Just for fun distribute up to 200 copies of this document, you must do it again while science... On the plain milk few other areas of the buttermilk “ holds the are... Container rainbow experiment with milk fill it up with milk, liquid soap or liquid laundry detergent Paper! You should only aim at covering the bottom some milk into the bottom of your recipient or to... Well you 've come … [ Read more... ], what is more than! Water 's surface tension: some are are hydrophilic ( or nonpolar ) and repel water or some other of...

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