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Q. 4. Air is necessary for a candle to keep burning prove with an experiment.

Ans: We can explain that oxygen is necessary for a candle to keep burning through this experiment.

Aim: To prove that air is necessary for a candle to keep burning.

Things required:
i) candle ii) jar iii) match box

Procedure:
i) Put the candle at the bottom of jar.
ii) Light the candle and let it burn for a while.
iii) Cover the jar and observe.

Observation:
The candle in a closed container cannot keep burning because oxygen in the container is used up.

Result: From this experiment we know that Air is necessary for a candle to keep burning

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