Please do these experiments with adult or parent supervision. These easy to do simple experiments will help kids understand, water density, air pressure and role of oxygen in burning.

Warm & Cold Water don’t mix

• Hot water is less dense than cold water, and rises when at bottom and hence it mixes.
• But when hot water is at bottom, it will not rise and hence not mix as well.

Glass & Candle experiment

• Twice as much oxygen is burned than carbon dioxide is released, the air volume decreases.
• Heat by candle, cancels depletion of oxygen temporarily and the water level stays down.
• When oxygen is depleted, candle goes out and the air cools. The volume of the air decreases and the water rises

Balloon Lifts Glass [Air Pressure Experiment]

• Hot air moves out on burning , reducing pressure inside & developing vacuum.
• Balloon sticks to glass, to fill this vacuum and hence lifts glass with it.