MadSci Network: Chemistry

Subject: Why does a candle blow out if oxygen is needed to burn?

Date: Fri Jul 25 22:41:28 2003
Posted by Lucas
Grade level: K-3 School: Rolling Hill Elementary School
City: Mukwonago State/Province: WI Country: USA
Area of science: Chemistry
ID: 1059190888.Ch

My 7 yr. old son asked me why does a candle blow out if fire needs oxygen to 
burn, and if you are blowing on it, you are giving it more oxygen? I have a 
vague idea but then it really bugged me I didn't know the exact answer.  After 
many a discussion with other adults, it came down to taking away one of the 
elements needed for the flame, too much energy in the wind and blowing the 
flame off the wick, thus the candle goes out.  Right?

Re: Why does a candle blow out if oxygen is needed to burn?

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