Materials Required A transparent glass filled with very hot water A transparent glass filled with cold water Food coloring An ink filler. How to do it Fill the glasses with the same amount of water, one glass with cold water and one glass with the hot water. Put one of food coloring into both glasses at the same time. Ask the kid to observe what happens to the food colouring. What is learnt The food coloring spreads faster throughout the hot water than in the cold. The molecules in the hot water move faster, spreading the food coloring faster than the cold water molecules which mover slower. As the temperature increases the bond between the molecules becomes weaker.
How to do it
What is learnt