You know air is needed for burning, but do you also know oxygen present in air is needed for burning? Let's prove it!!!
Materials:
A pan of water
Empty milk bottle
Candle
A box of matches
Materials:
A pan of water
Empty milk bottle
Candle
A box of matches
Instructions
Fix the candle on the pan of water now light the candle.
Then invert the milk bottle on the candle.
Observe: The candle extinguishes and the water rises 1/4 of the milk bottle.
How Does The Water Rises?!?!
As the oxygen in the glass is used by the candle the water takes the oxygen's place, but you may not be clearly answerable to the question "Is oxygen used for burning?" Let me tell the answer. As there is only 22% (1/4) of oxygen of the air the water rises 1/4 proving the absence of oxygen!
