How can show that air support burning?

Answer 1

If you put an enclosed container over a candle, after a few minutes or seconds, the flame will go out. This is because when the candle burns, it releases carbon. The air around the candle contains oxygen. The carbon and oxygen combine forming carbon dioxide. When there is no more oxygen to combine with, the flame goes out.

Answer 2

You will notice that the candle covered with inverted glass tumbler blows out after some time whereas the other candle continues to burn. This happens because there is no air inside the glass tumbler. However, the air initially present in the glass tumbler is used up in burning. This shows that air supports burning.

Answer 3

Fire needs oxygen to burn thats why we burn waste outside and to also avoid you house from catching on fire

Answer 4

Fire needs oxygen to burn better, and oxygen is in the air. You can prove this by lighting a fire (outside please) and slowly fan air to it with something like a news paper.

Answer 5

The easiest way of showing this would be to put a glass cup over a lit candle. It will extinguish the flame after the oxygen in the cup is depleted.