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2013年11月,笔者执教的化学九年级上册第六单元课题3“二氧化碳和一氧化碳”中“二氧化碳的性质与用途”一课在赣州市优质课比赛中获得了与会专家的一致好评,以下是本课的具体教学案例与思考。一、猜谜激趣,感知二氧化碳的性质与用途【教师】同学们,我们先来猜一猜它是什么化学物质?农民伯伯说它是“植物粮食”;消防官兵赞美它是“灭火先锋”;建筑师们称它为“粉刷匠”;环境学家却指责它是“造成全球变暖的罪魁祸首”。
In November 2013, I taught a course in Chemistry Grade 9, Unit 6, Unit 3, “Carbon Dioxide and Carbon Monoxide,” and “The Nature and Application of Carbon Dioxide” won the praise of participating experts in the competition of Ganzhou quality class. The following is a specific teaching case and thinking of this lesson. First, guess the riddles Interesting, perception of the nature and use of carbon dioxide [Teachers] Students, we first guess what it is chemical? Peasants uncle said it is “plant food”; fire officers and soldiers praise it is “ Pioneer ”; architects call it“ stucco ”; environmentalists have accused it of being“ the culprit responsible for global warming ”.