高中二年級(jí)英語(yǔ)選修6unit4第一課時(shí)課件.ppt

1、,Words study,Global warming,Unit 4,Nuclear leakage,Due to the greenhouse effect, the earth is becoming warmer and warmer-,But does it matter?,Skimming,Skim the title: THE EARTH IS BECOMING WARMER BUT DOES IT MATTER?,What is the main topic? The earth. B. Global warming. C. Becoming warmer doesnt matt

2、er.,Skimming,Where does this article most probably come from?,Newspaper B. Novel C. Magazine,Skimming,Who wrote the article?,What is the name of the magazine?,Tip: In English, some nouns begin with a capital letter(大寫(xiě)字母), such as names of people and places, titles of magazines, newspapers, stories a

3、nd books, peoples titles(頭銜), etc.,Skim the first paragraph:,Sophie Armstrong,Earth Care,Skimming,What are the names of the three scientists mentioned in the article?,Dr Janice Foster, Charles Keeling, George Hambley,Skimming,The organization of the article:,Introduction,A title,Body,Conclusion,Skim

4、ming,Skim the body part(7 paras):,Para. 1,Para. 2-3,I,II,Para. 4-6,III,Para. 7,IV,Introduction,Body,Conclusion,Scanning,Match the main idea of each part:,Explain how global warming comes about.,Two different attitudes among scientists towards the consequences of global warming.,Introduce the problem

5、 of global warming.,Give a warning and raise a question for the readers to think over.,I (1),II (2-3),III (4-6),IV (7),Careful reading,Fill in the blanks about the causes of Greenhouse effect.,henomenon,uantities,uels,rapped,esulting,Part II(Para2-3),Tip: You can know somebodys opinion through under

6、standing his or what he said.,What do Dr. Janice Foster and the scientist George Hambley think about the consequences of global warming? Do they agree with one another?,quotations(引言),Part III(Para4-6),Dr. Janice Foster thinks the effects of global warming could be very serious. George Hambley think

7、s global warming will be mild with few bad environmental consequences.,They dont agree with each other.,Part III(Para4-6),go up,catastrophe,very serious,positive,produce,a greater range of,The different ideas between Dr. Janice Foster & George Hambley,Idea-sharing,What will global warming bring to u

8、s in your opinion? (Find out supporting evidence),cause the sea level to rise severe storms droughts/floods famines the spread of diseases disappearance of species,Positive effects,Negative effects,cause the sea level to rise severe storms droughts/floods famines the spread of diseases disappearance

9、 of species,Positive effects,Negative effects,make plants grow faster crops will produce more a greater range of animals make life better ,True or false,Read the article carefully and finish exercise 2 on page 27,1. Whats the first graph about?,It shows the temperature increase of one degree Fahrenh

10、eit between 1860 and 2000.,Further Comprehension,2. Whats the second graph about?,It shows the carbon dioxide content in the atmosphere from 1957 to 1997.,3.The purpose of the first paragraph is to _. introduce the writer B. explain a change C. introduce the topic D. raise a question 4. The graphs a

11、re used to _. illustrate points by providing evidence tell the change of temperature tell the content of carbon dioxide in the air interest the readers 5. Whats the purpose of the last paragraph of the passage?,It functions as a conclusion by asking the reader to reflect on the major theme of the te

12、xt and to predict what might happen in the future.,The earth is becoming warmer does it matter? If it does, as a student, what should you do about it?,Discussion:,Debate,A,B,A : We shall do something about global warming.,B: We shall do nothing about global warming.,What should we do?,Idea-sharing,We should do nothing about global warming.,Debate,What have you learned from the passage about global warming? It is said that the climate is going to keep on warming for decades or century. Do you think that we should d