在初中物理、化学教材中,判断酒精灯内外焰温度高低的实验目前普遍使用的方法是:用一根火柴棍横放在酒精灯的火焰上,让学生观察火柴棍上的颜色,火柴棍上呈现黑色部分,这说明该处的火焰温度高,不变色的部分则说明温度低。笔者认为,这种证明方法不妥,主要有如下3点理由。 In junior high school physics, chemistry teaching materials, to determine the level of flame temperature inside and outside the alcohol lamp experiment commonly used method is: with a matchstick placed horizontally on the flame of the alcohol lamp, so that students observe the matchstick color, match stick Showing a black part, indicating that the flame temperature here is high, non-discolored part of the temperature is low. The author believes that this method of proving improper, there are three main reasons as follows.