Fun with Candle | English

This is a simple experiment very easy to do. You just need a plastic bottle, candle and a matchbox. Heat the base of the candle to melt it and then fix it in the bottle lid. Then light the candle. Finally invert the empty bottle and screw its mouth on its lid. Wait for a while. First the candle will burn brightly but slowly the flame will become feeble and extinguish. Why? Well a candle needs oxygen to burn. Maybe, the burning candle consumed all the oxygen and then shrunk in size. On opening the lid the bo

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