一、教材分析浮力是整个初中阶段物理教学的重点,也是难点.复习浮力需要用到力、二力合成、二力平衡、密度、液体的压强等知识,具有综合应用的特点.本章有三节教材,一节选学内容,多个知识点.既有演示实验,又有理论推导,既有原理,又有应用.正确理解阿基米德原理是重点,掌握物体浮沉条件是难点,激发学生学习兴趣,克服畏难情绪是关键.二、教学方法分析用量化归纳的办法把知识梳理归类,抓住求浮力的五种方法及物体浮沉条件的四个应用这个纲,网络全章知识点,纲举目张,使学生对 First, the analysis of textbooks buoyancy is the focus of physics teaching throughout the junior middle school level, but also difficult. Review of buoyancy requires the use of force, two-force synthesis, two force balance, density, liquid pressure and other knowledge, with comprehensive application features. This chapter has three sections of teaching materials , A selection of academic content, a number of knowledge points. Both demonstration experiments, theoretical derivation, existing principles, and applications. The correct understanding of Archimedes principle is the key, to master the object floating conditions is difficult, stimulate students interest in learning It is critical to overcome the fear of difficulty. Second, the analysis of teaching methods uses quantitative methods to classify the knowledge, seize the five methods of buoyancy and the four applications of object floating conditions, the network full chapter knowledge points, Ganggaozhangzhang, Make students right