嘉兴英语教学网.ppt

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1、Unit 4 Astronomy: the science of the stars,By Miss Zhang,Warming up,1 Nearly everybody has this or that puzzles:How do human beings come into being?How does the earth come into being?2. In China, there are two legends（传说） about these puzzles. Do you know the names?3.In the western culture, who creat

2、es everything in the world?,Nvwa made humans.,Pangu separates the sky from the earth.,3.In the western culture, who creates everything in the world?,The God,scientific,scientific,What abot scientific theory?,How life began on the earth,Reading,Learning aims(学习目标),1. To learn the formation of the ear

3、th and the development of life on it. (了解地球的形成及地球生命进化的过程).2. To develop some reading skills fast reading & careful reading（掌握快速阅读、详细阅读的阅读技巧）.,Learning guidance1（学法指导1）Fast reading,Read the passage fast, pay attention to the topic sentence of each paragraph, and finish task 1 independently, quietly a

4、nd quickly.(快速阅读文章，关注每段主题句，并独立、安静、快速地完成任务1。),Group help（小组互教）,Group members teach each other and solve the difficult problem together(小组成员互教并共同解决难题).,Fast reading,Task 1: Divide the whole passage into 2 parts, & match the main idea with each part.(把全文分成2部分，并与其主旨大意相连接),Part 1(Para._),Part 2(Para._),T

5、he development of the life,The development of the earth,1-3,4-5,Task 2: Get the main idea of the passage,According to the order of _ , the passage mainly talks about a theory of the _ and introduces briefly the formation(形成) of _ as well as the development of _ on it.,Tips：说明文是以说明方式介绍事物的特征、构造、变化或结果的

6、文章。它一般按时间顺序、空间顺序或逻辑顺序展开。,Big Bang,time,the earth,life,Learning guidance2（学法指导2）Careful reading,Read the passage carefully to get more detailed information，and finish tasks 3-4 independently, quietly and quickly. (仔细阅读文章获取更多细节信息，独立、安静、快速地完成任务2-3).,Group help（小组互教）,Group members teach each other and s

7、olve the difficult problems together(小组成员互教并共同解决难题).,the formation of the earth,Careful Reading: Task 3.,Read Paragraph 1-3 and put these sentences into the right order.A. The earths atmosphere was formed.B. After Big Bang , atoms began to form and combine to create stars and other bodies.C. The ear

8、th was so violent that it exploded and produced kinds of gases.D. Water appeared. E. The earth cooled down.F. For several billion years after the Big Bang，the earth was a cloud of dust.G. Slowly combine into a solid globe.H . Water was to be fundamental to the development of life,Answers:51476238,1

9、B. After Big Bang , atoms began to form and combine to create stars and other bodies.,a cloud of dust,create stars and other bodies,3.G. Slowly combine into a solid globe.,a solid globe,exploded with fire and rock,produced water vapour and gases,4.C. The earth was so violent that it exploded and pro

10、duced kinds of gases.,5.A. The earths atmosphere was formed.,6.E. The earth cooled down.,the earths atmosphere,cool down,7.D. Water appeared.,8.H . Water was to be fundamental to the development of life,Water appear,Answers:51476238,Careful Reading: Task 4 Read Paragraph 4-5 and fill the chart.,How

11、did life begin on the earth?,Small plants,shellfish,Green plants,amphibians,Careful Reading: Task 4 Read Paragraph 4-5 and fill the chart.,How did life begin on the earth?,Reptiles,forests,Dinosaurs,Mammals,Human beings,dioxide,Lets cut down carbon dioxide to save the earth!,We have only one earth!,

12、How life began on the earth?,“Big Bang”,atoms,stars,Earth: a cloud of 2._,dust,Summary,1.other bodies,a solid globe,the earths 4. _,other 3. _,5._ was fundamental to the development of life,water vapour,nitrogen,carbon,gases,atmosphere,Water,small plants in water,6. _and all sorts of fish,green plan

13、tson land,insects7_,forests,reptilesdinosaurs 8_humans,shellfish,amphibian,mammals,How life began on the earth?,Test in class（当堂检测）,阅读文章，从每题所给的A,B,C,D项中，选出最佳选项。,1.Why was life able to develop on the earth but not on other planets?A The earth had a solid shape. B. The earth did not have harmful gases

14、 in its atmosphere.C The water stayed on the earth but not on other planets. D.The earth was not too hot and not too cold.,2.Which the following statements is NOT TRUE? A. After the earth exploded, carbon, nitrogen, water vapour and other gases made up the earths water.B. Water was to be fundamental

15、 to the development of life .C. The continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.D. As the earth cooled down, water began to appear on its surface.,3.What is the main idea of paragraph 4？A.The importance of water for life.B.The arrival of

16、 humans and their impact on the earth.C.The development of plants and animals on the earth.D.A widely accepted theory about the formation of the universe.,4.What problem is caused by human being?A. They exist everywhere on the earth.B. They cause global warming.C. They find new methods of growing cr

17、ops.D.They enjoy hunting and fishing.,5.What can we infer from the last sentence in paragraph 5 ?A. Scientists think it is important for human beings to make the earth become hot . B. The earth will disappear if the problemscan be settled.C. If human beings protect the earth well ，life on the earth

18、can continue to exist in the future.D.The writer is satisfied with the situation of the earth .,Assignment（作业）,1. Finish Exercises 1-2 after class.2. Preview the language points on P43-48 in 全优课堂.,Thanks for your listening!,1. _n. 天文学 _n. 天文学家2._ n. 宗教 _ adj. 宗教的3._ n. 球体，地球 _ adj. 全球性的，全世界的4. _ adj

19、. 猛烈的，激烈的_ adv.猛烈地_n.激烈 5._ v.&n. 伤害 _ adj. 有害的6._prep不同，不像_prep像 v.喜欢_v.不喜欢7._n出席，到场，存在_v.出现，赠送 adj.到场的 n.礼物,Task 1 Words,astronomy,astronomer,religion,religious,globe,global,violent,violently,violence,harm,harmful,unlike,like,dislike,presence,present,8._v. 存在，生存 _ n.存在，生存9._ n.谜，难题 v.使迷惑，使为难 _ adj

20、.感到困惑的 _adj.让人困惑的10._adj.温和的，文雅的 _adv. 温和地，温柔地_n.温柔11._v.用尽，耗尽，使精疲力尽 _adj.感到精疲力尽的 _adj.令人精疲力尽的,exist,existence,puzzle,puzzled,puzzling,gentle,gently,gentleness,exhaust,exhausted,exhausting,2根据课文内容用适当的词填空，使短文完整。 At the very beginning, the earth was just a cloud of _ (energy) dust. Then the dust combi

21、ned into a ball moving around the sun. After that, it exploded loudly with fire and rock, _ (produce) water vapour, carbon, nitrogen and other gases, _ in the end made the earths atmosphere. Then the earth cooled down, and water, one of the earths special qualities, appeared and stayed on the earth,

22、 which made,energetic,producing,which,_ possible for life to begin _ (develop). Some small plants growing in the water appeared on the earths surface, _ (follow) by land animals, _ insects, amphibians, reptiles and the most important animals called dinosaurs. Finally dinosaurs disappeared _ of a sudden and some small clever animals with hands and feet appeared and spread all _ the earth. In place of dinosaurs they became _ most important animals on the planet that is, human beings.,it,to develop,followed,including/like,all,over,the,