The Physics Behind "Fanning The Flames"? So no one in class knew the answer and, of course, I don't know the answer (that's why I come to the geniuses on this board) . The question was: Explain why blowing on a fire may make it burn better. I'm pretty sure it has something to do with increasing the reaction rate of the fire so that oxygen combines with carbon and hydrogen at a greater rate. But why does blowing on a fire cause this to happen? This is where I'm stuck. Any help would be appreciated.