Sugar Density Experiment

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My kids love a good rainbow, and this experiment did not disappoint.
Why wait for one to appear in the sky when you can make a rainbow in a jar?  This sugar density experiment is a super fun way for kids to explore science, and you need nothing more than what you likely have on hand.
Make a sugar density rainbow in a jar!  This fun science experiment is great for kids of all ages and explores liquid densities in a beautifully visual way #sugarrainbowexperiment #sugarrainbow #sugardensity #sugardensityrainbow #densityexperimentforkids #densitysciencefairproject #densitytower #scienceexperimentskids #scienceexperiments
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This experiment is so colorful & fun!  The set-up is easy, and you only need a few common kitchen items.  

Are you ready to WOW the kids with a density rainbow in a jar?

Rainbow Density Jar

Materials
Note:  The layering process goes much faster when using an art syringe, though a pipette or eye dropper will also work.  Just be sure to layer the liquids slowly.

Preparation
You will want to begin this experiment with four cups.  Start by adding  sugar & food coloring to each cup as follows:
  • cup 1- no sugar & red food coloring
  • cup 2- 1 tablespoon of sugar & yellow food coloring
  • cup 3- 2 tablespoons of sugar & green food coloring
  • cup 4- 3 tablespoons of sugar & blue food coloring
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  • You only need a few drops of food coloring per cup.
  • Add 3 ounces of hot water to each cup and stir until the sugar is dissolved.
Make a sugar density rainbow in a jar!  This fun science experiment is great for kids of all ages and explores liquid densities in a beautifully visual way #sugarrainbowexperiment #sugarrainbow #sugardensity #sugardensityrainbow #densityexperimentforkids #densitysciencefairproject #densitytower #scienceexperimentskids #scienceexperiments

The Experiment

It is now time to make a sugar rainbow!  
You will want to begin with the blue water, because it is the most dense.
  • Carefully pour the blue water into a tall glass or vase.  
  • You can also use a science cylinder like this one.  The skinnier the glass the easier it is to achieve the desired effect. 
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  • For the next color you will want to use a syringe or pipette.
  • Carefully & slowly add the green sugar water to the container.  We found it easiest to run the water down the inside of the glass.
  • As the green water is added you will notice that it does not mix with the blue water but rather sits on top of it!
Make a sugar density rainbow in a jar!  This fun science experiment is great for kids of all ages and explores liquid densities in a beautifully visual way #sugarrainbowexperiment #sugarrainbow #sugardensity #sugardensityrainbow #densityexperimentforkids #densitysciencefairproject #densitytower #scienceexperimentskids #scienceexperiments
  • Pretty cool, right?
But why?  
Read on to find out!
  • Once all of the green water is added use the syringe to slowly begin adding the yellow water to the container.
  • Once all of the yellow water is added repeat this process with the red water.
Make a sugar density rainbow in a jar!  This fun science experiment is great for kids of all ages and explores liquid densities in a beautifully visual way #sugarrainbowexperiment #sugarrainbow #sugardensity #sugardensityrainbow #densityexperimentforkids #densitysciencefairproject #densitytower #scienceexperimentskids #scienceexperiments

The Science

Why don't the varying colors of water mix?
  • Given that the liquids have different densities (or weights) they stay separated.
  • Read more on the science behind the density of liquids.
My kids were in awe by this simple bit of science & wanted to make density rainbows in every color, so we did!
Extend the Fun
Can you make a sugar rainbow using every color of the rainbow?

Make a sugar density rainbow in a jar!  This fun science experiment is great for kids of all ages and explores liquid densities in a beautifully visual way #sugarrainbowexperiment #sugarrainbow #sugardensity #sugardensityrainbow #densityexperimentforkids #densitysciencefairproject #densitytower #scienceexperimentskids #scienceexperiments
  • Try mixing food colors to make yellow and purple.
  • Then, simply add more sugar to those cups than the others.
  • Can you make an all-out density rainbow?
Will this experiment work with other things besides sugar?
  • Give it a try & find out!  
  • Try making a density rainbow using salt.
  • Does it work?
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This play dough for kids is made using peanut butter and marshmallows! The recipe is SO easy, and the dough is taste-safe, making it great for kids of all ages! #playdough #playdoughrecipe #edibleplaydough #peanutbutterplaydough #peanutbutterplaydoughrecipe #marshmallowplaydough #tastesafeplaydough
SPRING SCIENCE FOR KIDS- 30 FUN ACTIVITIES! #scienceexperimentskids #sciencefairprojects #springscienceactivities  #springscienceexperimentsforkids #sciencefairprojectselementary #scienceforkids #scienceexperiments  #springactivitiesforkids #springcraftsforkids #springactivities #springcrafts #activitiesforkids #craftsforkids #kidsactivities
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Make a sugar rainbow with this fun density tower experiment for kids!  This easy to set up activity would make a great science fair project! #sugarrainbowexperiment #sugarrainbow #sugardensity #sugardensityrainbow #densityexperimentforkids #densitysciencefairproject #densitytower #scienceexperimentskids #scienceexperiments
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