Love in the Blue Wind Answer: 1 popularity: 6 Analysis time: 2009-07-07 10:46 Report.
One day, I came home and saw a group of workers repairing the line. I thought to myself: will there be a power outage at home? I flew home, as I expected, the power went out! It is dark in the room. I was so scared that I touched the candle. I turned on the lighter and found that the flame was rising. I thought it was just a coincidence that I lit the candle. I found that the flame of the candle was also upward! I'm surprised: why does the flame always go up? After several days of hard thinking, I finally found the answer: when a fire burns, it gives off a lot of heat. This heat heats the surrounding air, so the heated air expands, becomes lighter and begins to rise. In water, light objects always float, and so do in air. That is to say, because the air is heated and becomes an updraft, the direction of the flame is upward. It can be understood that the fire burns upward because the rising air or burning hot gas pulls the flame upward. Therefore, at the upper end of the flame, it presents a sharp shape like a candle or a match. This shape is close to a triangle, especially the top is exactly the same as the triangle. Because this effect is constantly produced when an object burns, the fire always burns upward. It can also be said that the flame is volatile and forms a gas dispersion space. In the upper part of the space, there is enough oxygen and full combustion, so the flame is big. After the combustion, the volatile gas at the back is constantly replenished, forming the phenomenon of seeing the flame channeling upwards. So the flame is like this!