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一、教材分析根据《初中物理教学大纲修订的内容介绍》将原来1个选学知识点(气体的压强跟体积的关系)上升为知道层次。因为它与生产、生活有着密切的联系,既能增加学生生活的内容,又能发挥学生的主动性和创造性,所以本节课的内容是初中物理教材中非常必要的知识之一。知道在温度不变时,气体的压强跟体积的关系是本节的重点,打气筒活动挂图的分析是本节的难点,做好实验,认真观察、分析、感受是上好本节课的关键。
First, the analysis of teaching materials According to the “Introduction to the Contents of Junior Middle School Physics Teaching Syllabus Revise,” the original knowledge of a selective knowledge (the relationship between the pressure of the gas and the volume) is increased to the level of knowledge. Because it is closely related to production and life, it can not only increase the content of students’ lives, but also give play to students’ initiative and creativity. Therefore, the content of this lesson is one of the very necessary knowledge in junior high school physics textbooks. It is known that the relationship between the pressure and volume of gas is the focus of this section when the temperature is not changed. The analysis of the pump flipchart is a difficult point in this section. It is a key to this lesson to do a good job of experiments and to observe, analyze and feel carefully. .