Burning Candle and Rising Water Experiment

This video shows the rising water experiment and the explanation on how it works.

Materials

water
food colour
plate / shallow basin
candle
matches/ lighter
glass/ bottle

How does this experiment work?

The burning candle heats the air inside the container and this hot air expands quickly. When the flame goes out, the air cools down and creates a weak vacuum or lower pressure inside the glass. On the other hand, the air outside the glass remains the same. This creates a difference in air pressure which results in the water rising inside the glass.

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