remember doing this experiment in elementary school! I have done it with oil but today I am doing it with sugar and water. To make your rainbow in a jar, students are learning about density by layering sugar water to create a rainbow! For the materials, it's all things you most likely have on hand. Materials: Approximately 2 cups of warm tap water 1/2 cup measuring cup 1 Tablespoon measuring spoon 4 small glass jars 1 1/2 cups granulated white sugar Red, blue, yellow and green food coloring Tall thin glass for the test tube Straw 4 popsicle sticks Step 1: Measure 1/2 cup warm tap water into each of the 4 jars Step 2: Add 2 drops of food coloring to each of the 4 jars Step 3: To the red jar, add 2 tablespoons of sugar. To the yellow jar add 4 tablespoons of sugar. To the green water, add 6 tablespoons of sugar. To the blue water, add 8 tablespoons of sugar. Step 4: Stir each of the jars to dissolve the sugar. If the water is not warm enough to dissolve, put it in the microwave for 20 seconds or so. Step 5: Pour about an inch of the blue water into your tall test tube glass. Step 6: Use your straw to gently drip the green water on top of the blue layer. It may work best to place the straw to the side of the glass, just above your blue layer. You should be adding the layers slowly and carefully, otherwise they will all mix together. Add your yellow layer and then your red. Stand back and admire your beautiful density rainbow!
P.s. I used probably too much blue and not enough yellow. It's an EXPERIMENT! The outcome isn't the most important. Enjoy the process :) Just like art! Xx, Mrs. Gipaya
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