The Spreading Molecules


The cold water will change color and the hot will spread out.


2 clear glasses

food coloring any color

medicine dropper

What Happens

The food coloring in the cold water changes the color of the water and the hot water spreads rapidly through out the water.


First put hot tap water in one glass and cold in the other.

Then put as much food coloring in the glasses as you want. Then just watch what happens.