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一、用途与特点此教具用于比较不同颜色的材料吸热能力不同。由于不同颜色的物体吸热能力不同,受热后瓶内空气的温度也不同,瓶内的空气膨胀的强度也不同,我们就会看到两边红色液柱上升的高度不同(如图1、2所示)。在这个对比实验中,只有颜色不同这个变量,同学们很容易得出颜色不同,吸热能力不同的结论。使用起来方便、直观、形象。二、制作方法及主要材料教具由四部分组成(装置示意图如
First, the use and characteristics of the teaching aids used to compare different color materials, different endothermic ability. Due to the different heat absorption capacity of different color objects, the temperature of the air in the bottle after being heated is also different, and the intensity of air expansion in the bottle is also different, and we can see the rising height of the red liquid column on both sides is different Show). In this comparative experiment, only the color of different variables, students can easily draw different colors, endothermic ability of different conclusions. Use convenient, intuitive, image. Second, the production methods and the main materials Teaching aids composed of four parts (device diagram such as