Ripple Knife

Find out the hidden color- A simple science fair project for kids

One day I was making a birthday card for my friend and I drew a picture of bouquet of roses on the card. I filled the roses with red color using my crayons. I found out many green colours are missing when I try to colour the stems. Then I was thinking what to do. My brother who is a fine arts student came there to help me. First he took the yellow crayon and painted the stem with yellow and then with blue. Then I feel wonder that the stem really looks green. This is because there are some hidden colours inside colours.

What all we need?

1. Filter paper or blotting paper
2. A packet of gems chocolates
3. A small cup of water
4. Plate
5. Scissors/cutting knife
6. A big bangle

How to proceed?

1. After keeping all the materials on the table, place the bangle on the filter/blotting paper. Draw a line around it with a pencil by holding the pencil close to the bangle. You will find a perfect bangle when you lift the bangle.
2. Cut the paper around the circle with scissors or paper cutter. After that, keep the round paper on the plate and a blue or brown colored gem on the paper.
3. Dip your finger in the water so as to hold it over the gem. Then a few drops of water will fall over it. Repeat this step for a few minutes or till the sweet becomes completely wet and water spreads to about 5cm around it. Leave it for a few minutes.
4. You can find some ripples of different colors around the gem after sometime. The color of the gems should be changed to white. Can you guess from where did all these colors come from when you had placed a blue colored gem over the paper? May be you have surprised that who had hidden so many colors inside it, right?

Explanation:

The principle behind is this magic is that we can create any colour by mixing two or more basic colors. Actually the blue color is also made up by the composition of different colors. When you pour water on the gems, the color in the sugar coating of the gems dissolves. The water is drawn out through the paper by the capillary action and moves in a growing circle. The colour of the gems is made up by different inks. This will move at different speeds and so they are separated.

The process of removing different colors is known as chromatography. The Greek word chrome means color and graph means writing. This is a valuable technique that has been used by the biochemists for separating mixtures. This has a wide variety of other applications such as to determine the ingredients that make up a particular flavour or scent, to analyze the components of pollutants, to find traces of drugs in urine, and to separate blood proteins in various species of animals.

About the Author

By,
Mejason John.

Get more interesting science projects like Color Wheel Experiments and Homemade Barometer from Science Fair Projects Hub.Com

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