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ID:52919459
大小:5.20 MB
页数:36页
时间:2020-04-14
《新人教选修6-Unit4-Global-warming-Reading[阅读课件].ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、WordsstudyGlobalwarmingUnit4WordsandexpressionsofUnit41.Comparedtothepastfewyears,what’stheweatherlikethisyear?2.Doyouwanttocheckitout?Herearesomepicturesbasedontheactuallifescenesintheseyearsforyoutoreferto.QuestionsInaddition,youmayturntoGraph1.onPage26tofindoutthechangesofthetemperaturesfromlong
2、-termaverage.Conclusion:Thewholeworldisbecomingwarmerandwarmer.Butdoesitmatter?Thisisthetopictoday.Unit4GlobalWarmingReadingTheEarthIsBecomingWarmer–ButDoesItMatter?FastReadingGlancequicklyatthemagazinearticleandanswerthequestions.SophieArmstrongwrotethemagazinearticle.Thenameofthemagazineis“Earthc
3、are”.1.Whowrotethemagazinearticle?2.Whatisthenameofthemagazine?Whatisthewritingstyle?A.Expositive(说明文)B.Practical(应用文)C.Argumentative(议论文)D.Narrative(记叙文)★★★CarefulReading1.Readthetextagainandtrytogetthemainideaofthearticle.Matchthepartswiththemainideas:Explainhowglobalwarmingcomesabout.Listtwodif
4、ferentattitudesamongscientiststowardsglobalwarming.Introducethetopicofglobalwarming.It’suptoreaderstothinkanddecidewhetherpeopleshoulddosomethingaboutglobalwarmingornot.PartIPart2Part4Part3QuestionsHowhastheglobalwarmingcomeabout?①Humanactivity---burningoffossilfuels.②Greenhouseeffect---greenhouseg
5、ases---weneedthosegases.Greenhousegases!What’sgreenhousegaseseffect?Greenhousegasestraptheheatofthesunandkeeptheairsurroundingtheearthwarm.Itiscalledthegreenhouseeffect.③WeaddhugequantitiesofextracarbondioxidetotheatmospherebyburningFossilfuels.Thecarbondioxideintheatmospherewentupfromaround315part
6、spermilliontoaround370partspermillionfrom1957to1997(SeeGraph2onPage26)ThetwodifferentviewpointstowardstheeffectsofglobalwarmingbetweenDr.JaniceFosterandGeorgeHambleyDr.JaniceFosterGeorgeHambleyCarbondioxidehascausedtheglobaltemperatureto__________.Anincreaseoffivedegreeswouldbea____________andcould
7、be______________.Morecarbondioxideisa__________thing,whichmakescrops_________more_andwillencourage____________________.goupcatastropheveryseriouspositiveproduceagreaterrangeofanimalsOfthetwoideas,whichareyo
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