高中英語必修三-Unit4-ReadingPPT優(yōu)秀課件

1、Unit 4 Reading,How Life Began on the Earth?,Spelling Bee 拼字大會 Chinese -English 1 理論，學(xué)說 2 猛烈的 3.不像 4.有害的 5.下蛋 6 存在 7 產(chǎn)生,分娩 8 輪到sb 9 阻止，制止 10謎，難題 11 及時，終于 English-Chinese 1Big Bang 2atom 3thus 4billion 5 globe 6 global 7violent 8 carbon dioxide 9 nitrogen 10 vapour 11 atmosphere 12 fundamental 13 pres

2、ence 14 dissolve 15 acid 16 chain reaction 17 dinosaur 18 multiply 19 oxygen 20 shellfish 21 amphibian 22. reptile 23 mammal,Pre-reading,Have you ever asked your mother, “Mom, where do I come from”?,2. How do human beings come into being? How does the earth come into being?,3. In China, there are tw

3、o legends about these puzzles. Do you know the names?,Chinese Legends (傳說),Pangu separated the sky from the earth. His whole body then turned into all kinds of things in the universe.,盤古開天辟地,女 媧 補 天,Legend: The Goddess Nvwa mended the heaven and created human beings from the clay(粘土).,4. In the west

4、ern culture, who creates everything in the world?,God,1.Do you believe in such stories? 2.Are they based on science?,?,Think about,How life began on the earth ?,P27/2: Put the order of development of life.,8 3 9 2 6 12,10 5 7 4 1 11,Match the main idea with each paragraph.,Para. 1 A.The formation(形成

5、) of the earth. Para. 2 B.The importance of water for life. Para. 3 C.A widely accepted theory about the formation of the universe. Para. 4 D. The arrival of humans and their impact(影響) on the earth. Para. 5 E.The development of plants and animals on the earth.,Detailed reading This text can mainly

6、divided into two stages.,Stage 1 : The development of the _ Stage 2 : The development of _,(para: 4 5 ),(para : 1 3 ),earth,life,Which of the following is NOT true? A The earth was a cloud of dust between 4.5 and 3.8 billion years ago. B The earth became violent because it exploded C The earth produ

7、ced some matter when exploding D Water appeared when the earth,exploded,cooled down,Which of the following is true? A There is also water on Mars today. B At first the importance of water was very obvious C Water is based on the development of life D The water in the oceans and seas can break down h

8、armful things,3 . It can be known from the passage that _.,A . Plants and animals appeared on the earth at the same time B . Plants appeared later on the earth than animals C . Early shellfish appeared earlier than plants D. Animals appeared later on the earth than plants,D,4 . How many years did di

9、nosaurs exist on the earth?,A . More than 140 billion years B. More than 140 million years C . More than 140 thousand years D . More than 140 years,5 . Why can the earth become too hot to live on?,A . Small clever animals produce more heat B. Small clever animals produce too much carbon dioxide C .

10、Small clever animals dont want heat to escape from the earth D . Small clever animals like to live on a hot planet,Post reading Stage 1: The development of the earth,.After the Big Bang,The earth was still just ,a solid globe,a cloud of dust,The dust settled into _,with fire and rock,Carbon,nitrogen

11、,water vapour and other gases,(2) What happened next?,The earth exploded ,Produced _,(3) What did they make?,the earths atmosphere,began to appeared on it surface,(4) What appeared as the earth cooled down?,Water,Stage2 The development of life,Paragraph4,Many millions of years later , began to appea

12、r.,small plants,shellfish and all sorts of fish,(2) next?,The later development of early ,insects,(3)on land?, began to grow on land , including some ,Green plants,4. next on land?,others called on land as well as in the water .,amphibians,Later the plants grew into ,forests,reptiles appeared,dinosa

13、ur developed,5.after forests , what appeared?,mammals on land,6.What after dinosaurs?,small clever animals,7. What life developed after mammals?,Para.5,We are making the world better.,We are making the world worse.,Discussion,solar energy,plant trees,recycle rubbish,prevent desertification,save wate

14、r,purify air,What can we do to take care of the earth?,Whether life will continue on the earth depends on human beings.,What can we do to take care of the earth? Dear fellow students, Its necessary for sb to do sth As we all know, Instead of , It is a waste of,1.課本63頁 ：1, 2, 4題. 2.準(zhǔn)備明天的單詞測驗。,Homewor

15、k,1.Why is it wrong to show films with dinosaurs and people together?,Because dinosaurs died out long before human beings developed on the earth.,2. What problem is caused by human beings?,Global warming.,Post reading,1.Who are the small clever animals with hands and feet? 2. Are they taking care of

16、 the earth well? Why?,?,Para.5 Discussion,Because they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.,The earth may become too hot to live on .,Comprehending,Choose the right answer. 金版學(xué)案 P84 Task2,Sum up,According to the passage

17、 ,we know the passage mainly explains .After the earth exploded and produced whose continued presence made it possible for life to develop, plants and including appeared on the earth.,how life began,on the earth,water,animals,human beings,Post reading,Discuss the following questions.,1. Why was the

18、earth different from the other planets?,3. Why is it wrong to show films with dinosaurs and people together?,2. Why did the plants grow before the animals came?,Because the water remained on the earth.,Because dinosaurs died out long before human beings developed on the earth.,Because plants provide

19、d oxygen for animals to breathe.,4. There used to be nine planets in the solar system. Recently scientists have decided that one of them can no longer be considered a planet. Do you know the name of it? Do you know why they removed it?,5. What problem is caused by human beings?,Its name is Pluto. Sc

20、ientists now think it is too small to be called a planet.,Global warming.,Can you find their English in the reading? 1. 隨后它會變成什么一直無法確定, 直到約45億至38億年, 這團(tuán)塵埃最終變成一個固體圓球。 2. 地球變得如此激烈動蕩, 以致于不知道這個形狀是否會繼續(xù)存在下去。 3. 更重要的事，隨著地球的冷卻，地球的表面就開始出現(xiàn)了水。 4. 很多科學(xué)家相信, 水的繼續(xù)存在使地球得以把有害氣體和酸的物質(zhì)溶解到海洋里。,Lets review the evolution of life on the earth.,After the “Big Bang”, the earth was full of water.,Original cells appeared in the ocean.,The cells in the water began to separate. Marine animals came into being.,Some animals (amphibian & insects) came to land.,Reptile appeared.,dinosaurs,mammals,Man ha