If you have gone to the science roadshow, then you would have seen the balloon explosion? This is how is works. With the first balloon you blow it up with your breath which is carbon dioxide. When it is blown up with air you tape a piece of paper to the balloon. Before you lite the paper you should block your ears or put earmuffs on so you do not hurt your ears. Watch the explosion and see if you like this explosion compare to the next balloon.
In the next balloon you put 100% oxygen and tie it up. Do the same with this balloon as you did with the first and watch the boom. Have you noticed the difference? Do you you know what has made the difference. The reason is because fire needs oxygen to stay in a flame.
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