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Kids Science Activities

Hot and Warm air requires more space than Cool air

Materials Required
  • Empty bottle
  • A Balloon
  • Hot water

How to do it

  • Stretch the balloon over the mouth of the empty bottle.
  • Place the bottle in the hot water, leave it for few minutes and ask your kid to observe what happens.
  • The balloon will start expanding.


As the bottle is kept in the hot water, the air inside the bottle is getting warer and hence the molecules move apart. This causes th eballoon to expand.

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