Rainbow In A Jar Science Experiment For Kids

Create Your Own Rainbow In A Jar With This Simple Experiment And Learn The Concept Of Density

A rainbow is a beautiful natural phenomenon that forms in the sky due to reflection that takes place between the sunlight and the rain droplets. What if you could create your own rainbow in a jar with your little one! As exciting as it sounds, the procedure to be followed for this science experiment for kids is quite simple. It is necessary to introduce basic science concepts like volume, density, viscosity, etc to children. 

They would be learning these concepts at school but it is always better to teach them at home with the help of easy and fun science experiments such as rainbow in a jar. Here, we will tell you how you can create a rainbow in a jar with your kid with the help of simple materials.

Rainbow In A Jar Experiment- Materials Required 

Simple household materials can be used to conduct the rainbow in a jar experiment. 

You will be needing empty cups, a measuring cup and some warm water, a measurable teaspoon and some sugar, food coloring, test tubes, a spoon and a baster.

Steps To Set-Up The Rainbow In A Jar Experiment

Here are the guidelines to set-up the rainbow in a jar experiment. Follow them carefully.

Step 1: Lay out six empty cups on the table. Fill these empty cups with equal amounts of water.

Step 2: Help your child add food coloring to the water and make sure the food color dilutes in the water. Your kid can add his/her favorite colors or rainbow colors to make them look colorful! 

Step 3: Take the sugar and a measurable teaspoon. Measure the sugar using the teaspoon and add different amounts of sugar to each cup.

2 tsp of sugar to the cup that contains red color

4 tsp of sugar to the cup that contains yellow color

6 tsp of sugar to the cup that contains green color

8 tsp of sugar to the cup that contains blue color

Step 4: Stir the sugar with the colored water using a spoon. Make sure the sugar is dissolved completely in all 6 cups.

STEP 5:  Stir until as much of the sugar is dissolved as possible.

STEP 6:  Time to use your baster or pipette to create a colorful rainbow in a jar.

STEP 7:  Use a pipette or a baster to suck up the colors and transfer them to a jar to create a beautiful rainbow in the jar!

Conduct An Interactive Session With Your Kid After The Completion Of The Rainbow In The Jar Experiment

Your kid will be thrilled to look at the colorful rainbow formed in the jar. Later, you can ask them a few follow-up questions regarding the rainbow in the jar experiment.

You can ask them the following questions:

  • How do you think the colors were stacked upon each other in the jar without getting mixed with each other?
  • How did water and food color mix easily in the cup?
  • Did you learn anything new from the rainbow in a jar experiment?

Science Behind The Rainbow In A Jar Experiment

The reason why the colored liquids stacked up on top of each other is Density! “Density is the measure of mass per volume”. Different amounts of sugar were added to different cups. The more the quantity of sugar added to the cups, the more the density of the solution increased. The different solutions had the same amount of water but different densities. This is the reason why the food-colored water stayed the same in the jar without getting mixed with each other, forming a colorful rainbow in a jar.