Science Experiment Term 2 Week 2

What happens if we mix some liquids that we have in the kitchen?

You will need:

Dishwashing liquid

Food Colouring

Whole fat milk


What to do:

1. Put milk into a container, saucer or plate.

2. Put one or two drops of food coloring into the milk.

3. Using a cotton bud or skewer add a bit of food dishwashing liquid into the spots of colouring.

4. Watch and observe what happens.

The science behind it all:

The molecules of fat bend, roll, twist, and contort in all directions as the soap molecules race around to join up with the fat molecules. During all of this fat molecule gymnastics, the food coloring molecules are bumped and shoved everywhere, providing an easy way to observe all the invisible activity. As the soap becomes evenly mixed with the milk, the action slows down and eventually stops. This is why milk with a higher fat content produces a better explosion of color—there’s just more fat to combine with all of those soap molecules.Try adding another drop of soap to see if there’s any more movement. If so, you discovered there are still more fat molecules that haven’t found a partner at the big color dance. Add another drop of soap to start the process again.