高中英语：Unit4 Astronomy the science of the stars-reading学案（新人教版必修3）

Unit4 Astronomy:the science of the stars-reading学案How Life Began on The Earth学习目标：1. To learn about the origin of life on the earth. 2. To master the usages of some key language points. 3. To develop the feeling of treasuring the earth and life.学习重点：1.Words: explode multiply spread 2.Expressions:whether or not in time to do sth allow to do in ones turn prevent from学习方法：自主探究；小组研讨学习过程：.Knowledge linkIn our solar system eight planets circle around the sun. Do you know them?. Reading1.Fast-readingMain idea of each paragraphParagraph 1 The importance of water for life Paragraph 2 The development of plants and animals on the earth Paragraph 3 The formation of the earth Paragraph 4 A widely accepted theory about the formation of the universe Paragraph 5 The arrival of humans and their impact on the earth2. Careful-readingRead the passage carefully and then put the order of development of life into a timeline. A. Insects and amphibians appeared B. Dinosaurs appearedC. The earth was a cloud of dust D. Water appeared on the earthE. The universe began with a “Big Bang” F. The earth became a solid ballG. Small plants grew on the water H. Mammals appearedI. Clever animals with hands and feet appeared J. Reptiles appeaOrder:_Crazy English: (Read the sentences loudly)1.According to a widely accepted theory, the universe began with a “Big Bang” that threw matter in all directions.2.The earth became so violent that it was not clear whether the shape would last or not.3.What is even more important is that as the earth cooled down,water began to appeared on its surface.4.It was not immediately obvious that water was to be fundamental to the development of life.5.This produced a chain reaction, which made it possible for life to develop.6.Why they suddenly disappeared still remains a mystery.Learning about language1.explode vt.: 使爆炸爆发；破除（迷信等），戳穿，驳倒explore vt.: 探究探索，钻研考察1. multiply vt.: 增加，繁殖 Rabbits multiply rapidly.乘，使相乘 5 multiplied by 4 equals 20. 5乘以4等于20.2. spread vt. : 伸展；延伸；展开；传播spread oneself 舒展四肢 spread over 延续3. They were in time to produce carbon, nitrogen.in time to do sth: 及时去做；in time to sth合拍子，按节奏. Exercise caf1. Hearing his son hurt badly by a stranger, the man _ with anger.A explored B exposed C exploded D explained2. Knowledge is _ much more quickly on the Internet than ever before. A spreading B carrying C developing D growing3. Dont worry. She will be back _ to prepare dinner. A on time B in time C at time D for time4. A: Our parents wont allow us to drive their car. B: Our parents _ us _ _ their car. 5.A:Youll feel sorry sooner or later for what youve done to her. B: Youll feel sorry for what youve done to her _ _. Consolidation (巩固) How life began on the earth? 1.Small plants in waterwater2. Shellfish and all sorts of fish Green plants on land 3. Insects on land4.amphibians on land and in water 5.reptiles (on land)6.dinosaurs (on land)7.mammals (on land) small clever animals with hands and feet8.humanforests Man had evolved from apes. .