A density column is a container of liquids that stack on top of each other because they have different densities. The heaviest liquid sinks to the bottom of the glass, while the lightest liquid floats at the top. A simple example of a density column is a mixture of oil and water. However, you can make density columns with more than two layers, plus you can color them. This pretty rainbow density column only requires sugar, water and food coloring! Rainbow in a Glass Video Tutorial | Step-By-Step Written Instructions
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