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【案例】今天,组内小陈老师上公开课,课题是《物质的组成》。在讲到“分子之间有间隙”时,小陈老师让同学们分组进行实验探究。学生分组实验:用两只同样的量筒分别量出20ml的水和20ml的酒精,然后将它们倒在一只量筒中混合并用玻璃棒搅拌。实验完毕后,小陈老师提问:“哪一组同学来交流一下你们的实验结果?”
[Case] Today, Mr. Chen Chen in the group took an open class and the topic was “The composition of materials.” When talking about “the gap between the molecules,” Mr. Xiaochen asked the students to group experiments to explore. Student grouping experiments: 20 ml of water and 20 ml of alcohol were measured separately with two identical measuring cylinders, then poured into a graduated cylinder and mixed with a glass rod. After the experiment was completed, Teacher Chen asked: “Which group of students exchanged your experimental results?”