义务教材人教版初三物理“内能”一节中 ,讲授内能跟物体的温度有关 ,为了证实温度越高 ,物体内部分子的无规则运动越激烈 ,物体的内能就越大 ,课本介绍了墨水的扩散实验 .取两只烧杯 ,分别倒入冷水和热水 ,然后小心地向杯中滴入墨水 ,让学生观察比较两杯水呈现均匀蓝色的过程 In the “Internal energy” section of the third-year physics textbook, the internal energy is related to the temperature of the object. In order to prove that the higher the temperature, the more irregular movement of the internal molecules of the object, the greater the internal energy of the object. Introduce the experiment of ink diffusion. Take two beakers, pour cold water and hot water, and then carefully add ink to the cup. Let students observe the process of comparing two glasses of water and show uniform blue color.