高中英语选修6第四单元阅读课件 .ppt

1、 Things that consume energy video playerrefrigeratorcomputer hairdryerlight/TV/water dispensercarwashing machineenergy sourcessolar energyoilcoalbiomass energynuclearenergyhydro-electric powerwind powernatural gaswave/tidalenergy Coal Oil Natural gas Uranium(nuclear energy)Wind(wind power)Sun(solar

2、energy)Water(hydro-electric power)Plant waste(biomass energy)Hot springs or geysers(geothermal energy)The sea(tidal energy)Fossil fuelsNon-renewableRenewable What are they?What are these buildings made of?Whats the use?greenhouse/glassA greenhouse is used for_,especially during _ weather.Turn to Pre

3、-reading 1,Page 25.Read&answer.growing _ the heat from the sunkeeps it from _ the air upHow does a greenhouse work?trapfrom:keep sth in a place存住来自存住来自的的trapsescapingheatsIn the atmosphere surrounding the earth there are gases,which are called“greenhouse gases”.methanewater vaporcarbon carbon dioxid

4、eFossil Fuel(矿物燃料矿物燃料)coaloil gasglobal warming produceWhat 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 effecttrapwarmwarmer and Skim the title:THE EARTH IS BECOMING WARMER BUT DOES IT

5、MATTER?A.The earth.B.Global warming.C.Becoming warmer doesnt A.Newspaper B.Novel C.Magazine Who wrote the article?What is the name of the magazine?Tip:In English,some nouns begin with a capital letter(大写字母大写字母),such as names of people and places,titles of magazines,newspapers,stories and books,peopl

6、es titles(头衔头衔),etc.Skim the first paragraph:What are the names of the three scientists mentioned in the article?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 matt

7、er?PPara.21.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 Para.31.How do human affect the earth warming up?It is due to the burning o

8、f 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 3.What is greenhouse effect?It is a natural phenomenon which happens when small amounts of gases

9、 in the atmosphere,like carbon dioxide,methane and water vapour,trap heat from the sun and therefore warm the 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

10、temperature to go 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 37

11、0 parts per million.PPara.51.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 t

12、o 1.5 degree Celsius,but it could be as high as 5 Tip:You can know somebodys opinion through understanding hisor 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?Dr.Janice Foster thinks the effects of glob

13、al warming could be very serious.George Hambley thinks global warming will be mild with few bad environmental Does global warming matter?Positive effects Negative effects 1.cause the sea level to rise2.severe storms3.floods4.droughts5.famines6.the spread of diseases7.disappearance of speciesPositive

14、 effects Negative effects 1.cause the sea level to rise2.severe storms3.floods4.droughts5.famines6.the spread of diseases7.disappearance of speciesPositive effects Negative effects 1.make plants grow quicker2.crops will produce more3.a greater range of animals4.make life Para.71.What do we actually

15、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

16、the article:IntroductionA titleBodyCSkim:Para.1Para.2-5Para.6Para.7Main ideas of each partWriting techniques(Paragraph 1)Introduce a debate over the issue of global warming.Raising a questionMain ideas of each partWriting techniques(Paragraphs 2-5)Illustrate how global warming comes about.Giving exa

17、mples,using graphs,explanation.Main ideas of each partWriting techniques(Paragraph 6)List two different attitudes among scientists towards global warming.Giving examples,making contrast.Main ideas of each partWriting techniques(Paragraph7)Its up to readers to think and decide whether people should d

18、o something about global warming or not.Using a question,leaving readers to think over the What will global warming bring to us in your opinion?I think In my opinionIt 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.