The purpose is to demonstrate the attractive force between water molecules.
Things Required:
1-foot sheet of wax paper
Toothpick
Eye-dropper
Water
Directions:
Spread the wax paper on a table. Use the eye-dropper to position three or four separate small drops of water on the paper. Wet the toothpick with water. Bring the tip of the wet pick near, but not touching, one of the water drops. Repeat with the other drops.
This Is What Happens:
The drop moves towards the toothpick.
Science Behind It:
Water molecules have an attraction for one another. This attraction is strong enough to cause the water drop to move towards the water on the toothpick. The attraction of the water molecules for one another is due to the fact that each molecule has a positive and a negative side. The positive side of one molecule attracts the negative side of another molecule.
