What activity you have done in your school to know the expansion of liquids due to heat
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Answer:
Experiment - Take a round bottom flask and fill it with water. Close its mouth with a cork having a delivery tube and mark the level of water as A. Now heat the flask, we see that the level of water in the tube rises from A to a higher mark B. Observation - This shows that liquids expand on heating.
The behavior of gasoline pumped on a hot day provides an example of liquid thermal expansion in response to an increase in temperature. When it comes from its underground tank at the gas station, the gasoline is relatively cool, but it will warm when sitting in the tank of an already warm car.
Balloon Expansion
Place the bottle in a container of hot water. Placing a rock in the bottom of the bottle will help weigh it down. Wait a minute or so for the bottle to heat up. You will notice that as the air inside the bottle heats, the balloon begins to expand.