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在教学大气的压力时,一教师技“问题——假设——验证——结论”的程序进行教学,收到了较好的教学效果。第一步:创设问题情境 1.实验。教师让每个学生准备两个同样大小的玻璃杯和几张浸湿的纸,在一个玻璃杯里投入一张燃烧着的纸片,趁火势旺时,用湿纸盖在杯口上,迅速地把另一只玻璃杯的杯口与盖纸的杯口对准,并用力压紧。一会儿,让学生缓缓提起未烧纸的杯子,这时,学生发现,两个杯子牢牢地“粘”在一起,下面的杯子不会掉下去。
In the teaching of atmospheric pressure, a teacher technology “problem - Hypothesis - Verification - Conclusion” program teaching, received a good teaching results. The first step: create a problem situation 1. Experiment. The teacher asked each student to prepare two glasses of the same size and several sheets of wet paper, put a piece of burning paper in a glass, Align the cup of the other glass with the cup of the lid and press firmly. For a while, having students slowly lift cups that were not burned, students found that the two cups were “sticking” together and the cups below would not fall.