4 Cool Rainbow Science Experiments for Teens | DIY
Have some fun making these cool and colorful rainbow science experiments!
The first experiment is the Rainbow Milk. It is an easy and colorful project to do when you are bored. It is a very affordable experiment. You need a plate, whole milk, food coloring, napkin or paper towel and dish soap. Pour milk into the plate, add drops of food coloring. Dip the napkin in some dish soap and place it in the center of the plate. You’ll see the colors dancing around, producing a marble effect. The dish soap goes after fat and break down, trying to dissolve the fat molecules in milk, causing the food coloring to move to the edge of the plate, making a beautiful color explosion! It is fascinating to watch!
The second experiment is Density Tower. Some liquid don’t mix but they rather float on top of each other due to density. Density is a measure of how much mass is contained in a given unit volume. We start with honey, and then dish soap, following with water, isopropyl alcohol and finishing with baby oil. It is an easy and interesting experiment to try at home.
The third is a sensory experiment: Lime/ Lemon Volcanoes.You need a Lime/ Lemon, baking soda and food coloring. cut the lime/ Lemon and squeeze the juice inside using a spoon, add food coloring and then baking soda on top, if needed, pour some more lemon juice on the top and watch this fascinating explosion of colors!
The last experiment is rainbow Lava Lamp. You need vegetable oil, water, food coloring and effervescent tablets. Fill the plastic bottle 3/4 full with vegetable oil, 1/4 with water and few drops of food coloring of your preference (different colors for each bottle). I used red, yellow, green and blue. Add the effervescent tablets, you can break the into small pieces, add one piece at a time observing each reaction. The water has higher density then the oil and it will sink in the bottom of the bottle. Food coloring doesn’t mix with oil, because of the density, the food coloring drops goes to the bottom layer reaching the water surface. The effervescent tablet will sink to the bottom, producing small bubbles of carbon dioxide gas. It happens because they contain citric acid (an acid) and baking soda (a base), when mixed with water, they react with each other and produce bubbling carbon dioxide. This creates the bubbles you see within the colored fluid in the soda bottle. It is another entertained and cool experiment to do!
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