同学们过生日时都会点燃生日蜡烛,借着星星点点的烛光在心中许下一个美丽的愿望,然后一口气吹灭所有的蜡烛,期待着你的愿望能实现。但是同学们是否注意过,刚吹灭蜡烛时能观察到什么现象?对,是蜡烛产生的一缕缕白烟,还有一股有点呛人的蜡油味道。那这个白烟的成分是什么呢?是不是蜡烛挥发出的蜡油呢?如果是的话,那么它就可以像蜡烛一样被点燃。可是想抓住这白烟却不是一件容易的事,它不像一张纸一样能抓得住,并且还会被我们呼出的气体以及刮来的风吹 Students will light the birthday candle when they are passing their birthday, make a beautiful wish in the heart with a little bit of candlelight, and then blow all the candles in one breath and hope that your wish can be fulfilled. But did the classmates noticed what could be observed when the candle was blown out? Yes, a plume of white smoke from the candle, and a choking waxy smell. What is the ingredient of the white smoke? Is it the wax oil that the candle emits? If it is, then it can be ignited like a candle. However, it is not easy to catch this white smoke. It is not as good as a piece of paper and can be exhaled by the air we breathe and the wind that blows