Sugar Water Density Rainbow Science Experiment * ages 5+

Posted on by Andrea

Sugar Water Density Rainbow Science Experiment 🌈 ages 5+ 🌈 This simple science experiment is perfect for demonstrating water density.

MATERIALS NEEDED (affiliate links):

  1. Food coloring
  2. Sugar
  3. Water
  4. Seven cups
  5. Dropper

Sugar Water Density Rainbow Science Experiment Video:

Check out the below video to see Nate making rainbow water and then try it yourself!

WHAT TO DO:

  1. Fill 6 containers with 1/2 cup warm water each (using warm water will help the sugar absorb more quickly).
  2. Add one drop of food coloring to each cup to just slightly color the water (the experiment works better when less food coloring is used and the water is only lightly colored).
  3. In the red cup add NO sugar.
  4. In the orange cup add 1 tsp of sugar
  5. In the yellow cup add 2 tsp of sugar
  6. Repeat adding sugar as follows green=3 tsp, blue=4 tsp, purple=5 tsp.
  7. Mix the cups until all the sugar is dissolved into the water.
  8. Now it’s time to create the rainbow. Start by adding the purple mixture to a new cup with a dropper. We added 1-2 droppers full of each.
  9. Slowly add the blue mixture by placing the dropper close to the surface of the water and applying to the wall of the cup.
  10. Continue with green, yellow, orange and red.

WHY IT WORKS:

Adding sugar to the water increases the density of the water allowing the colors to stay separate. Amazing!! 👍🏻

Check out our other cool science experiments!