Let us observe an experiment to see how air is necessary for burning.
You will need: a jar and two candles of the same size.
Your teacher will perform the activity as it is risky.
(i) Teacher places the candles on the table at a place where pupils can see. He lights up
the candles. Both burn brightly in the presence of air.
Candle A Candle B
(ii) Teacher covers one candle with a jar as shown in Figure10.
Candle A in open air Candle B covered with a jar
Figure 10 - Candles need air to burn
(iii) Observe the ame of each candle. Describe what happens after some time.
Candle A ..............................................................................................................................................................................................................
Candle B .............................................................................................................................................................................................................
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