新人教选修6-Unit4-Global-warming-Reading[阅读课件].ppt

《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