河北省尚义县第一中学高中英语选修六《UNIT 4 GLOBAL WARMING》READING》课件 .ppt

1、Words studyGlobal warmingUnit 4 1.fossil fuels 2.byproduct 3.greenhouse effect 4.greenhouse gases5.methane n.6.natural e about 8.quantities of 9.go up 10.result in 11.subscribe to 12.be opposed to13.build up 14.keep on1.Have you ever seen a greenhouse?is made of glass used for growing plants,especia

2、lly during cold weather.2.How does the greenhouse work?_ the heat from the sunkeeps it from _ the air upHow does a greenhouse work?trapfrom:keep sth in a place存住来自的The air inside was warm because the glass traps(挡住,吸收)the heat from the sun and keeps it from escaping(逃跑).This makes the greenhouse hea

3、t up(热量上升)and so the plants can grow throughout(在期间)the cold period.In the atmosphere surrounding the earth there are gases,which are called“greenhouse gases”.carbon dioxideFossil Fuel(矿物燃料)coaloilgasglobal warming What do you think greenhouse gases do?Greenhouse gases _ the heat of the sun and ther

4、efore _ the earth.It is known as _.Nowadays our earth is becoming_.greenhouse effecttrapwarmwarmer and warmerGreenhouse EffectGlobal warmingGreenhouse gases trapped the heat from the sun,which causes the temperature of earth goes The Earth Is Becoming Warmer But Does It Matter?Learning&teaching aims

5、:1.To develop some reading abilities.2.To learn about the main information of the passage.3.To develop the sense of environmental protection.Scanning 1.What is mainly discussed in the passage?A.What has caused the global warming and whether it matters.B.What effects of the global warming will be.C.H

6、ow serious the global warming could be.D.What the global warming is.2.Where does this article most probably come from?A.Newspaper B.Novel C.Magazine3.What are the two graphs about?Graph 1 shows the temperature difference(温度差异)from 1860 to 2000.Graph 2 shows the carbon dioxide content(二氧化碳含量)in the a

7、tmosphere from 1957 to 1997.Graph 1:Graph 2:4.Find out the topic sentences of each paragraph.Para.1Para.1 So how has this come about and does it matter?Para.2Para.2 that it is human activity that has caused this global warming rather than a random but natural phenomenon.Para.3Para.3 All scientists s

8、ubscribe to the view that the increase in the earths temperature is due to the burning of fossil fuels like.Para.4Para.4 the levels of carbon dioxide have increased greatly over the last 100 to 150 years.Para.5Para.5 it is the burning of more and more fossil fuels that has resulted in this increase

9、in carbon dioxide.Para.6Para.6 the attitudes of scientists towards this rise are completely different.Para.7Para.7 No one knows the effects of global warming.Does that mean we should do nothing?agreeled toParagraph 1Paragraphs 2&5Paragraph 6Part1Part2Part45.Main idea of each partPart3Paragraph 7How

10、global warming comes about?(全球变暖是怎样产生的)Two different opinions about global warming.The earth is becoming warmer.Should we do anything?Skimming:1.Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?A.Dr Janice Foster B.Charles KeelingC.George HambleyD.Sophie ArmstrongBv 2.W

11、hich of the following is NOT true according to the passage?A.The temperature in the last century didnt seem to increase much.B.Everyone believes that global warming caused by the activities of humans.C.The rise in carbon dioxide is causing a steady increase in global warming.D.Janice Forster believe

12、s that she can predict future global rise in temperature.DCareful Reading(for detailed information)1.Who wrote the magazine article?2.What is the name of the magazine?3.Whats the meaning of the word“explore”in Line.4?A.to examine a problem carefully.B.to answer a problem C.to visit somewhereSophie A

13、rmstrongEarth CarePart1(Para.1):an 4.The purpose of the first paragraph is to _.A.introduce the writer B.explain a changeC.introduce the topic D.raise a Part2(Para.2-5):the cause of global warming_ of fossil fuelshuman activity_ gases are produceda natural phenomenon called_ heat from the sunThe ear

14、th is _burninggreenhouse greenhouse effecttrapwarmedRead part 2 carefully and answer:What is the cause of global warming?Who is to blame for the global warming?Human activity?Or natural phenomenon?3.The graphs are used to _.A.illustrate points by providing evidence B.tell the change of temperatureC.

15、tell the content of carbon dioxide in the airD.interest the Greenhouse effect is a natural p .Greenhouse gases in the atmosphere can warm the earth by trapping heat energy.But the problem begins when we add huge q of extra carbon dioxide to the atmosphere by burning fossil f.Therefore,more heat ener

16、gy is tin the atmosphere.It is the increased amount of carbon dioxide that is r in global warming.4.Fill in the blanks about the causes of Greenhouse effect.henomenonuantitiesuelsrapped Part3(Para.6):two different attitudesBad effectsGood effectspessimisticoptimisticv 1.the sea level to rise v 2.sev

17、ere storms 风暴v 3.floodsv 4.droughts 干旱v 5.famines 饥荒v 6.the spread of disease v 7.the disappearance of species1.make plants grow faster2.crops will produce more 庄稼产量更高3.a greater range of animals 物种的丰富4.make life betterJanice FosterGeorge HDr.Janice Foster thinks the effects of global warming could

18、be very serious.George Hambley thinks global warming will be mild with few bad environmental consequences.They dont agree with each other.Para 1.Do they draw a conclusion at last?2.The writer probably thinks _.A.It matters.B.It doesnt matter.Part4(Para.7):Does it matter?NThere is no 1 that the earth

19、 is becoming warmer no matter whether is a natural 2_Scientists believe that“greenhouse effect”begins when we add huge 3 Extra carbon dioxide to the atmosphere by burning 4 .The increased 5 .carbon dioxide is causing the 6 temperature to go up.Scientists also agree that the burning of more and more

20、fossil fuels has 7 This increase in carbon dioxide.An increase of five degrees would be a 8 .Scientists cant predict the 9 well enough to know what to expect.summarydoubtphenomenonquantitiesfuelsamount ofglobalresulted incatastropheclimateOn the other hand,a scientist,George Hambleypredicts that any

21、 warming will be mild with few bad environmental 10 .He 11 that more carbon dioxide will encourage a greater 12 of animals-all of which will make life for humans better.However,greenhouse gases continue to 13 in the atmosphere and the climate is going to 14 warming.summaryconsequencestatesrangebuild

22、 upkeep onDebateABA:We shall do something about global warming.B:We shall do nothing about global warming.What should we do?Idea-sharingWe should do nothing about global warming.Group AGroup A3 Ss3 SsagreeagreereasonsreasonsGroup BGroup B3 Ss3 SsdisagreedisagreereasonsreasonsDebateSave our earth,sav

23、e ourselvesWith the earth becoming warmer and warmer,we With the earth becoming warmer and warmer,we should do something to save our only home-the earth.should do something to save our only home-the earth.Firstly,weFirstly,we should_ instead of_ should_ instead of_ while traveling.Secondly,when shopping,its a good while traveling.Secondly,when shopping,its a good way to_.Besides,_.Last way to_.Besides,_.Last but not least,_.but not least,_.Only in this way,can we save our earth.Only in this way,can we save our earth.Mini-paper bagswitch offplastic The green world will return to us!