write a experiment showing that air is necessary for combustion. please hurry!!!!!

Take two lighted candle fix it on a table. Take a glass jar and put on one candle. After sometime you will see that the candle stop burning after sometime. This  is because of absence of oxygen in the  jar..This shows that the oxygen is essential for burning. 

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Experiment-
Light a candle.Cover it with a glass tumbler and observe.You will find that the candle stops burning after a while .This activity shows that air is necessary for combustion.


It shows that air is very necessary for combustion.
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To show that oxygen is necessary for combustion of a substance.
Light a candle on a plate and cover the burning candle with a glass . you will see that the candle stop burning after some period.So, the candle burns only as long as the oxygen of the air is present in the glass container .The supply of fresh air to the burning candle is cut off by the inverted glass container.
So,oxygen is essential for the combustion.
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