-Granulated white sugar
-Red, blue, and yellow food colouring
-Four glasses
-A mesauring cup
-A tablespoon
-A large glass
-Water
-An eyedropper
Stages
1.-Pour 200 ml of water into each of the four glasses.
2.-In each glass, add food colouing ansd sugar in he amounts indicated below.
3.-Gently mix the contents of each glass with a spoon. Rinse the spon between each glass to avoid mixing their contents.
4.-Using the eyedropper, slowly put 150 ml of the contents of glass 1 (red) into the big glass.
5.-Then add 150 ml of the content of glasses 2,3 and 4 making the drops flow on the inner edge of the large glass
GLASS 1 GLASS 2 GLASS 3
6 drops of 6 drops of yellow food colouring 6 drops of blue food
red food +3 tablespoons of sugar colouring +2 tablespoons of
colouring sugar.
+4 tablespoons
of sugar
GLASS 4
3 drops of red food colouring
+3 drops of blue food colouring
+1 tablespoon of sugar
Whats happening? By adding sugar to the water, it dissolves and become invisible. Suddenly this changes the weight of the water. The more sugar is added to the water, the more the weight of the water increases. In other words, the water becomes denser (for the same amount of liquid it is heavier). In our experiment, the water with the greatest density is the red-coloured one, and the one wit he least density is the purple-coloured one. That's why it floats on the other liquids.
