新课标高中英语选修6第四单元阅读课件.ppt

Unit 4 Global warming,Things that consume energy,video player,refrigerator,computer,hairdryer,light/TV/water dispenser,car,washing machine,energy sources,solar energy,oil,coal,biomass energy,nuclear energy,hydro-electric power,wind power,natural gas,wave / tidal energy,Coal Oil Natural gas Uranium (nuclear energy),Wind (wind power) Sun (solar energy) Water (hydro-electric power) Plant 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.,Pre-reading,Turn to Pre-reading 1, Page 25. 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 dioxide,Greenhouse gases?,,Fossil Fuel(矿物燃料),coal,oil,gas, ,?,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,The earth is becoming warmer - but does it matter?,Reading,Page 26,,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 matter.,,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 article?,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 from 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 How do human affect the earth warming up?,It is due to the burning of fossil fuels like coal, 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 atmosphere, 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 global 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 to 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 warming 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?,quotations(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,cause the sea level to rise severe storms floods droughts famines the spread of diseases disappearance of species,Positive effects,Negative effects,cause the sea level to rise severe storms floods droughts famines the spread of diseases disappearance of species,Positive effects,Negative effects,make plants grow quicker crops will produce more a greater range of animals 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 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,Introduction,Body,Conclusion,( Paragraph 1 ),Introduce a debate over the issue of global warming.,Raising a question,Reading,(Paragraphs 2-5 ),Illustrate how global warming comes about.,Giving examples, using graphs, explanation.,(Paragraph 6),List two different attitu