Rainbow in a glass

Last term we did kitchen science and I am going to tell you about an experience called rainbow in a glass. It was part of us exploring and learning about density in liquids and was part of our Kitchen Science topic.

First we put water in the three beakers. We had a fourth and it was used for a different process. Then we put a drop of different food colouring in each of the beakers. The colours were red, blue and green. Next we put the sugar in. We put three teaspoons in the green two in the red and one in the blue. We put this amount of sugar in the different beakers of water so that they could stack as layers without blending into each other.

Then we stirred the sugar into the water and it took about five minutes to disappear as we had to dissolve it completely. We had made a solution. After that  we poured the green water into an empty beaker. We poured it over a spoon, gently trickling it down. We poured in the solution with the most sugar first and add the other two with less sugar after that.The reason we put it first is because it had the most sugar which also led to the most density. We poured the red coloring water on top of the green water. After  that we poured  the red colored water in. We poured the blue colour water on top of the red color. It clashed a little bit but steadied in a second. The rainbow is complete! It was a very fragile rainbow so a slight bump could wreck it. That was the complete phrase of a rainbow in a glass.

Each layer sat on top of the layer which had more sugar than it had.

by Jordan and Madeleine

The Materials:

• Four beakers
• Green food Colouring
• Red food colouring

• Blue food Colouring

• Spoon

Dr Jordan & lab assistant

Mad scientist @ werk

Rainbow in a glass

Lots of rainbows!!