Fill The Balloon Science Experiment

– 2 shallow pans - ice cold water - hot water - empty 2 liter bottle - balloon

Materials Needed:

Fill one pan half full with ice cold water  and the other pan half full with hot water.

Step 1

Place the balloon on the empty 2 liter bottle and place the bottle in the hot water.  Watch as the balloon inflates!

Step 2

Now move the bottle to the cold water and watch the balloon deflate!

Step 3

The reason this happens is that as the air molecules get hot, they move around more and occupy more space causing the balloon  to inflate.  When the air cools down they move less and the balloon deflates.

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