2006-11-15 06:44:03 · 3 answers · asked by Raju Athokpam 1 in Science & Mathematics ➔ Physics
this has to do with the density of air. As the molecules in the air heat up the start moving at higher speeds in all directions, spreading them apart, and as the density decreases, the air rises. With fire this happens at higher speeds.
2006-11-15 07:04:14 · answer #1 · answered by lastoftheafros 2 · 0⤊ 1⤋
The flame heats the air that's around it causing it to be less dense than the surrounding air it so it rises like a balloon filled with helium. It's like the warm air coming out the top of a table lamp.
2006-11-15 14:48:45 · answer #2 · answered by Gene 7 · 1⤊ 0⤋
Flame travels up to try to get more oxygen, it has burned the lower oxygen all ready and it is trying to get more. However as it get further from its fuel source it diminishes as on a candle.
2006-11-15 14:52:44 · answer #3 · answered by redhotboxsoxfan 6 · 0⤊ 1⤋