初中物态变化教学中,一个重要方面,就是要通过物质三态的互相转变,对学生进行辩证唯物主义的教育,对于这一点,我是从两个方面进行的。一、从感性入手抓住两个质变点本章中第一个质变点是熔解温发即熔点。抓住这个质变点对学生进行辩证唯物主义教育,最好从感性入手,认真做好萘熔解的演示实验(有条件的学校可改为学生实验),让学生观察和探索在对萘加热的过程中,随着温度的升高,萘的硬度、体积等量 One of the important aspects of the teaching of change in the state of junior middle school is to carry out a dialectical materialist education for students through the transformation of the three states of matter. I have done this from two aspects. First, to grasp the two qualitative changes starting from the perceptual point The first qualitative change point in this chapter is to melt the temperature or melting point. Grasping this qualitative change to educate students on dialectical materialism, it is best to start from a perceptual basis and do a good job of demonstration experiments of naphthalene melting (conditional schools can be changed to student experiments), allowing students to observe and explore the process of heating naphthalene With the increase of temperature, the hardness and volume of naphthalene are equal