人教版高中英语必修三unit4-reading课件PPT课件

1、Astronomy ?Are you interested inStep 1A quiz on astronomy第1页/共25页3. Earth is the only planet moving around the sun.Part 1: True or False1. The earth moves around the sun.TF2. It takes the earth one day to move around the sun.5. There is atmosphere on the moon.4. The earth is the only planet in the s

2、olar system which has living creatures.a year8 planets noFFT第2页/共25页Mercury 水星Venus金星Earth地球Mars火星Jupiter 木星Saturn 土星Uranus天王星Neptune 海王星第3页/共25页1. Do you know how the universe began according to Chinese culture ? In China, we all know that Pangu separates the sky from the earth.Lets brainstorm the

3、following questions第4页/共25页Chinese Legends (传说) Pangu separated the sky from the earth.His whole body then turned into all kinds of things in the universe.盘古开天辟地盘古开天辟地第5页/共25页2.Try to put the right order of development of life on the earth.If you want to know more, please turn to Page 25第6页/共25页Look

4、 at title and the pictures. Can you get some information about what we will learn from the text ?Big bang ?The evolution(development) of life on the earth ?The text may tell us the _ of the earth and the _ of life on it. How life begin on the earth Pre-readingPre-reading 第7页/共25页第8页/共25页Fast reading

5、 Match the main idea with each paragraph.第9页/共25页Para. 1 The formation(形成) of the earth.Para. 2 The importance of water for life.Para. 3 A widely accepted theory about the formation of the universe.Para. 4 The arrival of humans and their impact on the earth. Para. 5 The development of plants and ani

6、mals on the earth. 第10页/共25页Careful reading Task one (para 1)What is the widely accepted theory in Para 1?The universe began with a Big Bang that throw matters in all directions.第11页/共25页a cloud of _ Big Banga solid _slowly combinethe earth _ downit exploded loudly with _ and _the earths _dustball/g

7、lobefire rockatmospherecooledHow did the earth come into being(产生）?Task two (para 2)第12页/共25页 Why is water so important for the beginning of life? paragraph3dissolve harmful gases and acids into the oceans and seas.Because water allowed the earth to第13页/共25页 What life developed after water appeared?

8、Paragraph4 small plantsgreen plants forestearly shellfish and all sorts of fishinsects and amphibians reptilesdinosaursmammals第14页/共25页About 2.6 million years agoNowHumans produce too much carbon dioxide , making the earth too hot to live in.Para 5 After the clever animals (humans) became important

9、on the earth, what happened?Answer question 第15页/共25页1234567Lets check whether we put the right order at first. Are you right?第16页/共25页Task three Please read the text again, then put the order of these sentences. ( exercise 2, page 27) Insects and amphibians appeared The earth became a solid ball Re

10、ptiles appeared. The earth was a cloud of dust. Shellfish and other fish appeared. Clever animals with hands and feet appeared.第17页/共25页 Dinosaurs appeared. Small plants grew on the water. Plants began to grew on the earth. Water appeared on the earth. The universe begin with a “big bang” Mammals ap

11、peared.第18页/共25页Big Bang4.5-3.8 billionmany million years later 2.6 millionNow Time Events Big Bangdust solid globewater appearssmall plantsshellfish and fishplants grow on the landinsects and amphibians reptiles dinosaur mammals clever animalshumans life earth 第19页/共25页Sum up The text may tell us t

12、he _ of the earth and after _ appear, the _ of life one after another on it. formation water development第20页/共25页In the last paragraph, we know humans face seriously global warming problem, which is threatening our existence. Can you write something to call on us to protect our environment ?Discussi

13、on 第21页/共25页 The earth we live in is becoming more and more terrible, so we must take measures to deal with it Firstly: Secondly: Thirdly: We hope the environment will become more and more beautiful.Sample 第22页/共25页 The earth we live in is becoming more and more terrible, so we must take measures to

14、 deal with it Firstly, the government should pass laws to prevent people and factories from polluting the environment. Secondly, everyone should realize the importance of the problem and try their best to protect the environment and fight against pollution. Besides, its a good ideas to plant trees to improve the environment. We