《浮力》是力学中重要教学内容之一,物体在液体或气体中受浮力后有漂浮、悬浮、沉底三个状态和上浮、下沉两个过程,情况较为复杂,所以理解浮力概念对于抽象思维不够健全、思考问题不够全面的初中生来说有一定的难度。创设什么样的问题情景、设计什么样的提问来作引导,才能更有效地帮助学生来认识浮力,作者进行了反思,与同仁共同切磋。 “Buoyancy” is one of the important teaching contents in mechanics. The objects are buoyant, floating and sinking in the liquid or gas, and the floating and sinking are the three states. The situation is complicated, so understanding the concept of buoyancy for abstract Thinking is not sound enough, thinking problems are not comprehensive enough junior high school students have a certain degree of difficulty. Create what kind of problem scenarios, what kind of design questions to guide, in order to more effectively help students to understand buoyancy, the author conducted a reflection, and colleagues to learn.