高中英语unit4globalwarming课时作业新人教版

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1、Unit4　Globalwarming【导语】全球气温变暖给南极的企鹅带来了怎样的影响，你知道吗？为了保护他们，我们应该怎么做？Antarctica,thecoldestplaceonEarth,istoocoldformosthumans.It'sadifferentstoryforpenguins，though.SeveraltypesofpenguinsmaketheirhomeinAntarctica.Thebirdswalkwithshortstepsallovertheicycontinent.However，the

2、ydon'tallhave“happyfeet”．SomeofAntarctica'spenguinsareendangered.Theanimals,huntforfoodinwatersoffAntarctica'scoasts.Theyusefloatingseaiceasaplacetorestwhiletheysearch.Inrecentyears,globalwarming,theslowriseofEarth'stemperature,hasbeencausingtheicetomelt.“Globalwarmi

3、ngisreducingtheamountoffoodforpenguinssothattheycan'tfindenoughtoeat,”scientistShayeWolfsaid.TurninguptheheatHumansmaybedirectlyresponsibleforthecontinent'stemperaturechanges,accordingtoanewstudyinthejournalNatureGeoscience.TemperaturesinAntarcticausuallydonotgoabove

4、freezing,or32degreesFahrenheit.Butlatelytheweatherhasbeenheatingup.Peopleaddtoglobalwarmingwhentheydrivecarsoruseelectricity.Thatburnsfossilfuels,suchascoal，oil，andnaturalgas.TheburningoffossilfuelsgivesoffgasesthatwarmEarth.TheharmfulgasesstayintheatmosphereaboveAnt

5、arctica,researcherssay.Theyfoundthatthewestsideofthecontinentisespeciallyaffectedbyglobalwarming.ScientistsareconcernedaboutthepossibilitythatAntarctica'sicemaymeltmoreovertime.Theicycontinentisabout5millionsquaremiles.Itiscoveredbyglaciersandanicecap(冰冠)about7，100fe

6、etthick.Iftheicemelts,thatcouldcausesealevelstorisearoundtheworld.Highersealevelscouldleadtodangerousfloodinginsomecountries.CoolfixforAntarctica20ExpertsarehopefulthatconditionsinAntarcticacanbeimproved.Theysaypeoplecanreduceglobalwarmingbyusingcarsandelectricityles

7、soften.Evenkidscanhelp.Wolfsuggests，“Talktoyourfriendsandfamilyaboutglobalwarming,howitisharmingpenguins,andhowimportantitistostopglobalwarmingtoday.”【词海拾贝】1．Antarctican．南极洲2．penguinn．企鹅3．fossiln．化石；生物4．glaciern．冰河；冰川【问题思考】1．Whycan'tpenguinsfindenoughfoodtoeat?______

8、_________________________________________________答案：Becauseglobalwarmingisreducingtheamountoffoodforthem.2．Whomaybedirectlyresponsi