选修6unit4-Global warming-reading.ppt

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1、Unit4GlobalWarmingTheEarthIsBecomingWarmer–ButDoesItMatter?Workingroups---listthingsasrequired:1.Thingsthatconsumeenergyaroundusoratanyotherplaces.2.SourcesofenergyWarmingup–I(３m)ThingsthatuseenergyInahouseThingsthatuseenergySourcesofenergylightstelevisioncassetteplayercomputerfridgesto

2、vewashingmachinehairdryervideorecordercoaloilnaturalgaswind(power)sun(solarenergy)water(hydro-electricpower)thesea(tidalenergy)uranium(nuclearenergy)plant(biomassenergy)Windmills,renewable.What?Renewable?Warmingup–P25What?Renewable?Acoalpowerstation,non-renewable.What?Renewable?Anoilref

3、inery(精炼厂),non-renewable.What?Renewable?Anuclearpowerstation,non-renewable.solarpanelsrenewableWhat?Renewable?What?Renewable?Ahydro-electricdam,renewable.Geothermal(地热的)EnergyPlantWhatisthegreenhousemadeofandusedfor?Whatisthis?Thesun.GreenhouseHowdoesitwork?Theairinsideiswarmbecausetheg

4、lasstrapstheheatfromthesunandkeepsitfromescaping.Thismakesthegreenhouseheatupandsotheplantscangrowthroughoutthecoldperiod.QuestionsWhatisgreenhouseeffect?greenhouseeffectCarbon-dioxideTheleadinggassesare:Carbon-dioxideMethaneOzone(O3)NitrousOxide(N2O)Whichgreenhousegasesdoyouknow?Asthee

5、arthisbecomingwarmer,therearemanydisasters.tsunamiTheriseofthesealevelfloodssnowdisasterfaminesthespreadofdiseasesdroughtsListentothetapeandfindoutthemainideaofthepassage:ReadingPart1(Paragraphs1)Part2(Paragraphs2-5)Part3(Paragraphs6)Introduceadebateovertheissueofglobalwarming.Describeh

6、owglobalwarmingcomesabout.Listtwodifferentattitudesamongscientiststowardsglobalwarming.Part4(Pa7)It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.Choices.1.Whofoundouttheamountofcarbondioxideintheatmospherefrom1957to1977?A.Dr.JaniceFoster.B.CharlesK

7、eeling.C.GeorgeHambley.D.SophieArmstrong.B〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓ReadingIV(3m)2.Theauthorprobablyagreesthat________A.actuallyglobalwarmingisgoodformankind.B.weshoulddonothingabouttheglobalwarming.C.catastropheswillhappeniftheglobekeepsonwarming.D.alotremainst