新课标高中英语选修6第四单元阅读课件.ppt

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1、 Things that consume energy video player refrigerator computer hairdryer light/TV/water dispenser car washing machine energy sources oil nuclear energy natural gas wave / tidal energy Coal Oil Natural gas Uranium (nuclear energy) Wind (wind power) Sun (solar energy) Water (hydro- electric power) Pla

2、nt waste (biomass energy) Hot springs or geysers (geothermal energy) The sea (tidal energy) Fossil fuels Non-renewable Renewable What are they? What are these buildings made of? Whats the use? greenhouse / glass A greenhouse is used for_, especially during _ weather. Turn to Pre-reading 1, Page 25.

3、Read & answer. growing plants cold _ the heat from the sun keeps it from _ _ the air up How does a greenhouse work? trapfrom: keep sth in a place 存住来自 的 traps escaping heats In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”. methane water vapor carbon dioxi

4、de carbon dioxide Fossil Fuel(矿物燃料 ) coal oil gas global warming produce What do you think greenhouse gases do? Greenhouse gases _ the heat of the sun and therefore _ the earth. It is known as _. Nowadays our earth is becoming _. greenhouse effect trap warm warmer and warmer Skimming Skim the title:

5、 THE EARTH IS BECOMING WARMER BUT DOES IT MATTER? What is the main topic? A.The earth. B. Global warming. C. Becoming warmer doesnt matter. Skimming Where does this article most probably come from? A.Newspaper B. Novel C. Magazine Skimming Who wrote the article? What is the name of the magazine? Tip

6、: In English, some nouns begin with a capital letter(大写字母 ), such as names of people and places, titles of magazines, newspapers, stories and books, peoples titles(头衔 ), etc. Skim the first paragraph: Sophie Armstrong Earth Care Skimming What are the names of the three scientists mentioned in the ar

7、ticle? Dr Janice Foster, Charles Keeling, George Hambley 1. How much did the temperature of the earth rise during the 20th century? About one degree Fahrenheit. 2. What is the question of Sophie Armstrong? So how has this come about and does it matter? Para.1 Para.2 1.What conclusion can you make fr

8、om the Graph1? The earth is becoming warmer. 2.Who is to blame for the earths becoming warmer? It is human activity that has caused this global warming rather than a random but natural phenomenon. Para.3 1.How do human affect the earth warming up? It is due to the burning of fossil fuels like coal,

9、natural gas and oil to produce energy. 2. What is greenhouse gases? Greenhouse gases are some byproducts of the process of producing energy, the most important one of which is carbon dioxide. 3. What is greenhouse effect? It is a natural phenomenon which happens when small amounts of gases in the at

10、mosphere, like carbon dioxide, methane and water vapour, trap heat from the sun and therefore warm the earth. 4. What kind of problem does it begin when huge quantities of extra carbon dioxide into the atmosphere? It means that more heat energy tends to be trapped in the atmosphere causing the globa

11、l temperature to go up. 1. What conclusion can you get from Graph2? The levels of carbon dioxide have increased greatly over the last 100 to 150 years. 2. What did the scientist Charles Keeling find between the years from 1957 to 1997? He found that the carbon dioxide went up from around 315 parts t

12、o around 370 parts per million. Para.4 Para.5 1. Do the scientists accept the data? They accept the data and agree that it is the buring of fossil fuels that had resulted in this increase in carbon dioxide. 2. How high will the temperature increase go? Dr Janice Foster says that the amount of warmin

13、g could be as low as 1 to 1.5 degree Celsius, but it could be as high as 5 degrees. Tip: You can know somebodys opinion through understanding his or what he said. What do Dr. Janice Foster and the scientist George Hambley think about the results of global warming? Do they agree with one another? quo

14、tations(引言 ) Para 6 Dr. Janice Foster thinks the effects of global warming could be very serious. George Hambley thinks global warming will be mild with few bad environmental consequences. They dont agree with each other. Para 6 Does global warming matter? Positive effects Negative effects 1. cause

15、the sea level to rise 2. severe storms 3. floods 4. droughts 5. famines 6. the spread of diseases 7. disappearance of species Positive effects Negative effects 1. cause the sea level to rise 2. severe storms 3. floods 4. droughts 5. famines 6. the spread of diseases 7. disappearance of species Posit

16、ive effects Negative effects 1. make plants grow quicker 2. crops will produce more 3. a greater range of animals 4. make life better Para.7 1. What do we actually do now and what will happen to the climate? We donot start reduing the amount of carbon dioxide. The climate is going to keep on warming

17、 for decades and centuries. 2. What about the effects of global warming? No one knows. Does that mean we should do nothing Or,are the risks too great? The organization of the article: Introduction A title Body Conclusion Skim the body part(7 paras): Para. 1 Para. 2-5 I II Para. 6 III Para. 7 IV Intr

18、oduction Body Conclusion Main ideas of each part Writing techniques ( Paragraph 1 ) Introduce a debate over the issue of global warming. Raising a question Main ideas of each part Writing techniques (Paragraphs 2-5 ) Illustrate how global warming comes about. Giving examples, using graphs, explanati

19、on. Main ideas of each part Writing techniques (Paragraph 6) List two different attitudes among scientists towards global warming. Giving examples, making contrast. Main ideas of each part Writing techniques (Paragraph7) Its up to readers to think and decide whether people should do something about

20、global warming or not. Using a question, leaving readers to think over the issue. Idea-sharing What will global warming bring to us in your opinion? I think In my opinion It will cause / make Assignment Write a short passage about the effects of global warming. Prepare the language points of this passage and underline the important ones. After remembering the vocabulary, do the exercises on Page 28. LOGO