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[教学目的] 1.知道浮力的概念 2.初步理解产生浮力的原因 3.通过实验研究浮力与哪些因素有关 [教学过程]一、引入新课师:在大量筒的底部有一个乒乓球,不能将量筒口倒过来,如何将乒乓球取出?
[Teaching purposes] 1. Understand the concept of buoyancy 2. Understand the reasons why buoyancy is generated 3. Experiment with buoyancy and which factors are involved [Teaching process] 1. Introduce a new teacher: There is a table tennis ball at the bottom of a large number of canisters. Turn the graduated cylinder upside down. How do you remove the table tennis?