Experiment with candle

Children were trying to do candle experiment. First prepared some colored water and poured it into a plate. Then lighted a candle and placed inside the colored water. Covered the candle with a transparent glass cup. As soon as you cover the candle, youcould see the water started rising inside the glass and then the flame turned off itself.

This is because the heated flame makes air inside to expand and escape out to create a vacum inside. The flame gone off, created a cold atmosphere inside and this caused a less pressure inside. Then the high pressure of air outside is pushing inside which is of less pressure causing the water to rise inside. Colored water helped to visualise the rising of water more clearly.

It was of fun to kidoos and they tried to experiment a few times to see how the water rises.