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一、课堂描述师:上课之前先请同学们猜猜成语“风马牛不相及”的意思?生:事物彼此毫不相干。师:成语是人们生活智慧的结晶。但一位美国的科普作家却颠覆了这种固有的观念,指出沙子与恐龙这两样毫不相干的事物有着内在的关联。今天这节课我们走进《被压扁的沙子》,寻找其中的奥妙。师:请同学们速读课文,简洁的语言说说“沙子恐龙能相及”的原理。生:斯石英是超高压被压扁的沙子,在陨石撞击的地区,发现了斯石英,而在火山活动地区没有发现,且陨石撞击地区的岩层年龄为6500万年,因此,造成恐龙灭绝的原因不是火山活动,而应该是撞击。师:“沙子恐龙能相及”告诉我们一个道理,那就是一一生:不同科学领域之间是紧密相连的。在一个科学领域
First, the class description division: Before class, students are invited to guess the idiom “Irrelevant” does not mean: Health: things have nothing to do with each other. Teacher: Idioms are the crystallization of people’s life wisdom. But one American science writer has subverted this inherent notion that the sand is intrinsically linked to two irrelevant things, dinosaurs. Today we have walked into “squashed sand” in this lesson to find the mystery. Teacher: Please speed reading texts, simple language, “sand dinosaur phase and ” principle. Health: Silverstone is an ultrahigh-pressure crushed sand that was found in areas hit by meteorites but not found in areas of volcanic activity, and rock formations hit by meteorites hit the region at 65 million years, causing the extinction of dinosaurs The reason is not volcanic activity, but should be hit. Teacher: “Sand dinosaurs can relate to ” tells us a truth, that is, a lifetime: between different scientific fields are closely linked. In a scientific field