Tate Please look at Chemical and Heat Energy. It might help explain some of the terms above.
What happens in a fire is that the chemicals (in the wood or coal structure) begin to break up. This gives the fire more energy and the break up gets worse. The initial particles break up into their parts (atoms) and then some combine with the oxygen in the air and give of more energy and form a fantastic gas called Carbon Dioxide which trees breathe.(another story). BUT some don’t get that far and become your smoke (maybe more oxygen was needed). IF your adult could put a cold spoon in the flame of a candle you would see an example of the smoke of a candle.
Never ever play with fire yourself it is very, very dangerous.