《浮力》一课,是前面学过力学知识的延伸与扩展,是初中力学部分的重点与难点,也是中考的热点知识。它综合运用到了各方面的知识,如,力的测量、重力、二力平衡、二力的合成、密度、压力、压强等重要知识。为了让学生更好地理解本节课的教学内容,主要采用学生实验、教师演示实验、学生探究实验、教师讲解分析等手段进行教学。 “Buoyancy” lesson, is learned in front of the extension and expansion of mechanical knowledge, is the emphasis and difficulty of junior high school mechanics, but also the examination of the hot spot knowledge. It comprehensively applied to all aspects of knowledge, such as force measurement, gravity, the balance of the two forces, the synthesis of two forces, density, pressure, pressure and other important knowledge. In order to enable students to better understand the teaching content of this lesson, the main use of student experiments, teachers demonstrate experiments, students explore experiments, teachers explain the analysis and other means of teaching.