人教版英语选修6第四单元Reading.ppt

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1、 From the following pictures,you will know where all this energy comes from.windmillsa coal power stationan oil refinerya nuclear power plantsolar panelshydro-electric damSample listsThings that use energySources of energyRenewable/non-renewablelightheatingcoalnon-renewableoilnon-renewabletelevision

2、 cassette player video recorder computer natural gasnon-renewable wind(wind power)renewable sun(solar energy)renewable uranium(nuclear energy)non-renewable fridgestovewashing machinehairdryerwater(hydro-electric)renewableplant waste(biomass energy)renewablehot springs or geysers(geothermal energy)re

3、newablethe sea(tidal energy)renewableRenewable or non-renewable?Renewable or non-renewable?What is told in the picture?What is the greenhouse made and used for?A greenhouse is made of glass and is used for growing plants,especially during cold weather.How does it work?The air inside is warm because

4、the glass traps the heat from the sun and keeps it from escaping.This makes the greenhouse heat up and so the plants can grow throughout the cold period.What are the“greenhouse gases”?In the atmosphere surrounding the earth there are gases called“greenhouse gases”,including carbon dioxide,methane(甲烷

5、甲烷,沼气沼气)and water vapor.What do you think greenhouse gases do?They trap the heat of the sun and keep the air surrounding the earth warm.Main ideas of each partWriting techniques(Paragraph 1)Introduce a debate over the issue of global warming.Raising a questionMain ideas of each partWriting technique

6、s(Paragraphs 2-3)Illustrate how global warming comes about.Giving examples,using graphs,explanation.(Paragraphs 4-5)List two different attitudes among scientists towards global warming.Giving examples,making contrast.(Paragraph 6)Its up to readers to think and decide whether people should do somethi

7、ng about global warming or not.Using a question,leaving readers to think over the issue.I.Read the text carefully and fill in the blanks.Scientists OpinionJanice Foster We need _ like carbon dioxide,methane and water vapour,but if we add huge _ extra carbon dioxide to the atmosphere by burning fossi

8、l fuels,it will cause the _ to go up.gasesquantities ofglobal temperatureScientists OpinionJanice Foster Over the next 100 years the amount of warming could be as low as 1 to 1.5 degrees Celsius,but it could be as high as 5 degrees Celsius.An increase of five degrees would be a _.catastropheScientis

9、ts OpinionsGeorge Hambley Believes that we shouldnt worry about _ of carbon dioxide in the air.Predicts that any warming will be mild with few bad environmental _._ that more carbon dioxide is actually a _ thing,which will make life for human beings better.high levels consequencesStatespositiveII.Ch

10、oose the best answer.1.The first graph in the text is used to _.A.attract readers attention B.B.introduce the topic of global warmingC.act as an example D.support the opinion and make it more convincing2.The author probably agrees that _.A.global warming is good for usB.B.we can do nothing about glo

11、bal warmingC.catastrophes will happen if the globe keeps on warmingD.much remains to be found out about the effects of global warming Answer the questions.1.Who wrote the magazine article?What is the name of the magazine?Sophie Armstrong wrote the magazine article.The name of the magazine is Earth C

12、are.2.What are the names of the three scientists mentioned in the article?They are Dr.Janice Foster,Charles Keeling and George Hambley.3.What do they think about global warming?Do they agree with one another?There are some very different attitudes among scientists towards this issue.Some think the e

13、ffects will be terrible,while some others believe that we should not worry about it.Graph I shows the temperature increase of one degree Fahrenheit between 1860 to 2000.4.What are the two graphs about?Graph 2 shows the carbon dioxide content in the atmosphere from 1957 to 1997.5.What is the main top

14、ic of the article?Global warming/the warming of the earth.1.The temperature in the last century did not seem to increase much.2.Everyone believes that global warming is caused by the activities of humans.3.3.Janice Foster believes that she can measure the future global rise in temperature.4.The rise

15、 in carbon dioxide is causing a steady increase in global warming.5.George Hambley believes that global warming will do good rather than harm to the earth.6.It is clear what the effects of global warming will be.Debate Instructions Get into groups of six.Decide which three in your group are going to

16、 agree with the statement(Group A)and which three are going to disagree with the statement(Group B).Group A discuss why they agree with the statement;Group B discuss why they disagree.Group A and B get together.Tell each other the reasons for agreeing or disagreeing with the statement.Supplementary

17、materials for debating Global warming 1.The planet has warmed anywhere from 0.5 to 1.0C(1 to 2F)over the last century.This small amount makes a huge difference,causing glaciers to melt and,potentially(潜在的潜在的),sea level to rise.We could see even more of this in the future,(maybe another 3C,or 5F)2.A

18、definition of global warming would have to include a measurable,consistent temperature rise,like the one we have seen in recent history.A question remains Is it an unusual change?Much debate about that one.3.The earth gets one kind of energy(visible light)from the sun and gives off another kind(infr

19、ared红外线红外线).This kind is what gets trapped by“green house gases”(GHGs)in the atmosphere.Green house gases4.The global warming green house effect really is a bogus(假的假的)term.A greenhouse keeps warm by physically trapping the air inside and preventing convection(对流对流).The atmosphere helps keep the pla

20、net warm by trapping outgoing radiation instead.5.The leading gasses are Carbon-dioxide,Methane,Ozone(臭氧臭氧)and Nitrous Oxide(一氧化二氮一氧化二氮).Gas analyzers show the concentrations of this stuff have increased somewhat since the beginning of the industrial revolution.6.The greenhouse effect raises the ave

21、rage temperature of the Earth by more than 30 degrees,so without it the Earth would be a very cold place!green house effect GREENHOUSE Feeling helpless to do anything about global warming?Find out how one family cut their own personal greenhouse-gas emissions by 65 percent-and how you can do the same.Homework 1.Read the passage again and review the new words and expressions.2.Prepare the debate in groups.3.Preview Using Language-WHAT CAN WE DO ABOUT GLOBAL WARMING?