Rainbow in a Jar
Create a vibrant and educational rainbow display in a jar using common household items while exploring the science of liquid density and color mixing.
Ingredients
Materials
- 1 jar Clear glass or plastic jar Any clear container works well, but a jar is preferred for visibility.
- 1 cup Water Use divided for layering.
- 3 drops Food coloring (red, blue, green) Use any desired colors.
- 1/4 cup Sugar Dissolves in the first layer.
- 1 spoon Spoon For mixing and layering.
- 1 cup Measuring cups For accurate measurement of ingredients.
- 1 optional small funnel Help control layering flow.
Instructions
Preparation
- Measure and mix 1/4 cup of water with 1/4 cup of sugar in one container. Stir until fully dissolved. This will be your first layer, which will have the highest density.
Coloring the Layers
- Divide the remaining water into three separate containers. Add a different food coloring to each—red, blue, and green. Stir until you reach your desired shade.
Layering
- Using a spoon, gently pour the sugared water into the jar. This is your lowest density layer.
- Carefully use the spoon to layer the colored water over the sugared water. Pour slowly to prevent mixing. Start with the next densest liquid (green), followed by blue, and finally red.
- Tilt the jar slightly or use a funnel if needed to help control the flow.
Notes
Experiment with different colors or add glitter for a magical touch. Use different liquids like honey or maple syrup for varying effects. Practice pouring techniques to improve layer separation.