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1、,新课标人教版课件系列,高中英语必修3-4.14,Unit 4,Reading,Astronomy:the science of the stars,What was there on the earth before life began? Why does scientist think there has never been life on the moon? Why do animals first appear in the sea? Why do green plants help life to develop? Why were mammals different from
2、other animals?,We are going to learn a passage about how life began on the earth. Now read the text quickly with the following questions.,READING,Now please listen to the recording of the text. Pay attention to the pronunciation of each word and the pauses within each sentence and try to find out th
3、e characteristics of the whole passage.,Next you are to read and underline all the useful expressions or collocations in the passage. Copy them to your notebook after class as homework. Get the main idea of each paragraph.,Read the passage quickly and find out the answers to the questions below.,1.
4、Whats the main idea of the text? 2. The topic sentence of each paragraph? 3. How many parts can the text be divided into? 4. Whats the main idea for each part?,Scanning,1. Whats the main idea of the text?,How life began on the earth.,The development of living things.,2. Topic sentences: After the “B
5、ig Bang”, the earth was just a cloud of energetic dust. What scientists think that the different because of the arrival of small plants growing in the water on its surface. Many millions of years later the first green plants began to appear on land Small clever animals, now with hands and feet, appe
6、ared and spread all over the earth.,How many parts can the text be divided into?,Three parts: Part 1 (para 1)Part 2 (para2.3.)Part 3(para4),Water made it possible for life begin to develop.,The development of life.,The development of people.,Energetic dust,a ball,slowly combine,the earth cooled down
7、,it exploded and produced kinds of gases,water,the earths atmosphere,Big Bang,Read Para 1. and find out how the earth came out,Fill in the blanks with the proper words:,After the _,the earth was a cloud of _. Later the dust began to_ Into_. And then it _ loudly with fire and rock,which were in time
8、to _ the water vapour,carbon dioxide, which were to make the earths _.As the earth _ down,_ began to _ on its surface. Water had _ from planets or satellites,but it _on the earth.That made it possible for life to begin to _.,energetic dust,combine,exploded,produce,cooled,appear,disappeared,stayed,de
9、velop,“Big Bang”,a ball,atmosphere,water,Read part 2 very carefully, and fill out the chart: How life began on earth,water,1.,2.,3.,4. insects (on land) 5.,6.,7. 8. dinosaurs (on land) 9,small plants in water,shellfish and allsorts of fish,green plants on land,amphibians(on land and in water),forest
10、s,reptiles(on land),mammals(on land),Fill in the blanks with the proper verbs:,The arrival of _ encouraged the _of early _. Many millions of years later _ began to appear_. Later _ appeared. Some were_. Others called _,were able to live on lands well as _. When the plants grew into forests, _appeare
11、d for the first time. After they disappeared,_became more important. They were the last group of animals different from because they _from within their bodies.,development,shellfish and all sorts of fish,on land,land animals,amphibians,dinosaurs,mammals,produced,small plants,the fist green plants,in
12、sects,in the sea,Intensive reading,1.Why was the earth different from other planets ?,A. It produced a lot of heat. B. The water remained.C. Water disappeared. D. It was the oldest planet.,2. Why was life able to develop on the earth but not on other planets ?,A. The earth had a solid shape.B. The e
13、arth was not too hot and not too cold.C. The earth didnt have harmful gases in itsatmosphere . D. The water stayed on the earth but not onother planets.,3. Why was it necessary for plants to grow before animals ?,A. Animals needed plants to protect them from the sun.B. Animals could hide from hunter
14、s in forests.C. It was easier for plants to grow.D. Plants provided oxygen for animals to breathe.,4. What problem is caused by human beings ?,A. They cause global warming.B. They exist everywhere on the earth.C. They find new methods of growing crops.D. They enjoy hunting and fishing.,Put the order
15、 of development of life into a time line. insects and amphibians appear a solid ball reptiles appear a cloud of dust shellfish and other fish appear dinosaurs appear small plants grow on the water plants begin to grow on dry land presence of water mammals (including humans )appear,D,B,I,G,E,H,A,C,F,J,Post-reading,Why is it wrong in films and stories to show dinosaurs and people together?2. Why do you think that humans are the cleverestanimals on the earth?,Dinosaurs died out long before human beingsdeveloped on the earth.,
