A Complete Collection of 100000 Whys
Fav十万个为什么
为什么火焰向上燃烧？
1、热空气上升：火焰燃烧产生热量，使周围空气温度升高，热空气密度变小，因此向上流动。
2、浮力作用：热空气比冷空气轻，根据浮力原理，热空气会向上浮起，带动火焰向上。
3、燃烧产物上升：火焰燃烧产生的气体（如二氧化碳）比空气轻，会自然上升。
4、氧气供应：火焰需要氧气助燃，上方氧气更充足，火焰向上燃烧以获取更多氧气。
5、火焰形态：火焰向上燃烧形成特定的形态，有助于热量和气体的排出与补充。
总之，火焰向上燃烧是由于热空气上升、浮力作用、燃烧产物上升、氧气供应和火焰形态共同作用的结果。
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