全新版大学英语第二册教学案 Unit 8Protecting Our Environment.docx
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全新版大学英语第二册教学案 Unit 8Protecting Our Environment.docx
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全新版大学英语第二册教学案Unit8ProtectingOurEnvironment
Unit8ProtectingOurEnvironment
Ⅰ.Teachingplan
objectives
studentswillbeableto:
Studentswillbeableto:
1.graspthemainidea(weshouldadoptasensiblemvirom1entalism)andstructureofthetext(each
partcontainingacontrast);
2.appreciatethevariousargumentativeskillsemployedinthetext;
3.masterthekeylanguagepointsandgrammaticalstructuresinthetext;
4.conductaseriesofreading,listening,speakingandWritingactivitiesm1atedtothethemeoftheunit.
Timeallotment
1stperiod
2ndperiod
3rdperiod
4thperiod
5thperiod
Pre-reading
While-reading
(sensibleenvironmentalism;textorganization
While-reading(languagepoints)
While-reading;(languagepoints;textorganization)
Post-reading(methodsofargumentation;after-textexercises)Checkonstudents’homereading(TextB)
Theme-relatedlanguagelearningtasks
1.TasksSSthefollowingquestionsonthesongBigYellow1hzi:
(5minutes)
Whatkindofparadiseisdescribedinthesong?
(amalparadisebeforeitwasspoiledbypaved
roads,parkinglots,buildings,etc.)
Whatisthethemeofthesong?
(protecttheenvironmentbeforeitistoolate)
2.Perceptualmap(13minutes)
1)TasksSstospeakoutanythingtheycmthinkofinassociationwithenvironmentalprotection.
2)Tnotesdownthosethingsontheblackboard.Tmustput"environmentalprotection"downonthecenteroftheblackboard,andarrangeSs’ideasaroundit.Ss'ideasaregroupedbysimilarity.
3)Tsumsupthecategoriesofassociation,andadvisesSsthattheymayusesomeassociationgroupsinthewritingrequiredbytheTheme-RelatedLanguageLearningTasks.
3.TmayleadintoTextAbysaying:
Theissueofenvironmentalprotectionhasbeentalkedaboutoverandoveragain.That'swhywecmcomeupwithsomanyassociations.Nowlet'stakealookatTextAtofindoutwhatnewideastheauthorhastooffer-(2minutes)
while-readingtasks
1.Whatisasensibleenvironmenta1ism?
(15minutes)
1)Sslookatthetitle,SavingEarth,butOnlyforMan,andtrytomakeitintoacompletesentence.(Wemustprotecttheearth'senvironmentsothatitcanbetterservehumanbeings.)
2)TguidesSSthroughthedefinitionofsensibleenvironmentalisminPara5一"Asensibleenvironmentalism,theonlykindofenvironmentalismthatwillwinuniversalpublicsupportbeginsbyunashamedlydeclaringthatnatureisheretoserveman.Asensibleenvironmental-ismisentirelyman-centered:
itcallsformantopreservenature,butonthegroundsofself-preservation."
3)Ssscanthetexttofindothersentencesexplainingsensibleenvironmentalism(theycanbefoundinParas2,6,8,14).
2.TdrawsSs’attentiontoTextOrganizationExercise1,dictatestothemthemainideasofeachof
thethreeparts.ThenTtellsSsthattheyaretofillthesupportingdetailsastheygothoughthetext-(10minutes)
3.TexplainslanguagepointsinPadIandgivesSspractice(seeLanguagestudy).(25minutes)
4.SsfinddetailssupportingthemainideaofPartI(5minutes)
5.TexplainslanguagepointsinPartIIandgivesSspractice(SeeLanguagestudy).(25minutes)
6.SsfinddetailssupportingthemainideaofPartII.(10minutes)
7.TexplainslanguagepointsinPMIIIandgivesSspractice(seeLanguageStudy).(10minutes)
8.SsfinddetailssupportingthemainideaofPartIII-(5minutes)
9.SSCompleteTextOrganizationExercise2.(7minutes)
Post-readingtasks
1.Methodsofargumentation(SeeTextAnalysis)(25minutes)
1)Tstatesthatthisessayisapieceofargumentativewriting,andasksSStocomeupwithwaysofpresentinganargument.TwritesdownSs’,answersontheblackboard.Attheend,ifnecessary,TmaysupplementtheSs’listwithmoremethodsofargumentation.
2)Ssformgroupsoffourtofivetofindoutwhatmethodofargumentationisusedineachpart
ofthetext.
3)Somegroupsreporttheirfindingstotheclass.
4)TurgesSstoemploythesemethodsintheirownwriting.
2.TguidesSsthroughsomeafter-textexercises.(20minutes)
3.TchecksonSs’homereading(TextB)(3minutes)
4.SsdoPartIV:
Theme-RelatedLanguageLearningTasks-(1period)
II.TextAnalysis
TheargumentativemethodsemployedinTextAareasfollows:
Contrast:
TextOrganizationExercise2.
Concession:
(Para8)"Thecountryneedasubstantialenergytattoreduceconsumption.
Butitneedsmoreproductiontoo-"(Para8)"Ilikethereindeerasmuchasthenextman.AndIwouldberathersorryiftheirmatingpatternsaredisturbed.Butyoucan'thaveevery.”(Para11)"Iamnoenemyoftheowl.Ifitcouldbepreservedatnoorlittlecost,Iwouldagree:
thevarietyofnatureisagood,ahighaestheticgood,ahighaestheticgood.Butitisnomorethanthat.”
Quotation:
Para8quotesProtagoras,principle:
"Manisthemeasureofalthings-"
Example:
(Para3)"Forexample:
preservingtheatmosphere,bybothprotectingtheozonelayerandhaltingthegreenhouseeffect,isanenvironmentalnecessity-"。
缸a13)"Themosturgentaccommodationmustbemadewhentheveryintegrityofman'senvironment一生&,atmosphericozone---isthreatened.Whenthethreattommisofalesserorder(§矗立,thepollutantsfromcoal-andoil-firedgeneratorsthatcausedeathfromdiseasebutnotfataldamagetotheecosystemamoremoderateaccommodationthatbalanceseconomicagainsthealthconcernsisinorder-"
Definition:
Thedefinitionsof"luxuries"and"necessities"inPaz-a2;andthedefinitionof"sensibleenvironmentalism”inPm5.
Causeandeffect:
(Para3)Ozonereductioncausesskincanceretc.(Para4)Greenhouseeffectleadsto"meltingicecaps,floodedcoastlines,disturbedclimate,driedupplansand,ultimately,emptybreadbaskets."
Data:
(Para7)"...theMaystormsthatkilledmorethan125,000Bengalisandleft10millionhomeless-,,(Pa-a8)"Governmentestimatesindicateanearlyfifty-fiftychanceatundertheANWRliesoneofthefivelargestoilfieldseverdiscoveredinAmerica-,,(Para11)"...livelihoodfor30,000loggingfamilies,Ichoosefamilyoverowl-"
III.CulturalNotes
1.Environmentalprotectionorganizations:
Withagrowingawarenessoftheimportanceofenvironmentalprotection,anumberofenvironmentalprotectionorganizationshavebeenestablished.Herearesomeofthem.
GreenParty:
aBritishpoliticalpartythataimstoprotecttheenvironment.Itisagainsttheuseofnuclearpowerandotherformsofindustryandtransportwhichitconsidersharmful.Itwasformedin1973astheEcologyParty,andchangeditsnametotheGreenPartyin1985.Othercountriesalsohavepartiesthatsharethesamenameandideals.
Greenpeace:
alargeinternationalpressuregroupthataims$0protecttheenvironment.Itsmembersarewell-knowfortakingdirectactionandputtingtheirownlivesinsmallboatstostoppeoplefromharmingtheenvironment.Forexample,theyoftengooutinsmallboatstostoppeoplefromkillingwhalesorthrowingpoisonousmaterialsintothesea.TheEnvironmentalProtectionAgency:
aUSgovenm1entorganizationthatestablishedrulesandstandardsforprotectingtheenvironment,e.g.againstpollution.
2.greenhouseeffect:
theretentionofheatbythelowerlayersoftheEarth'satmosphere,which,itisbelieved,willcauseariseintemperatureoftheEarthanditsatmosphere,knownasglobalwarming.Justastheglassofagreenhouseletsintheultravioletradiationfromthesunwhiletappingtheinfraredradiationemittedwithin,sogasesintheatmosphere(suchaswatervapor,carbondioxide,methane,andchlofontlogocarbons,orCFCs)absorbinfraredradiationfromtheearth’ssurfaceandreflectitbackontotheplanet.Withtheadditionofsolidpollutants,thecapacityofthelowerlayerstoabsorbandre-radiateheatisincreased.Theaverageconcentrationofcarbondioxideintheairhasincreasedbyover15percentinthelasthundredyearsorso,duemainlytotheburningofvastquantitiesofsuchfossilfuelsascoal,gas,andoil.This,coupledwithdeforestation,isreducingtheplanet'sabilitytomaintainthecarbondioxidebalance.Itisexpectedthattheoriginallevelofcarbondioxidewillbedoubledwithinthenexthundredyears.
Itisdifficulttopredicttheextentandeffectsofglobalwarming,butin1990scientistsoftheInternationalPanelonClimateChangesuggestedthatworldtemperaturesmayhaverisenby050Cinthepastcenturyandbesettoriseaaldher10Cby2030and3-40Cby2090,unlessdrasticactionistaken-Therisesforecastdisastersconsequencesformankind-especiallyforthepoorandthoseinlow-lyingregions-includingfamine,death,andmassmigration.Expansionofoceanwatersandmeltingofpolaricecapswouldraisesealevelsbyuptolm(2-3feet)withinacent1117,floodingsuchhighlypopulateddeltasastheGangesinBangladesh.Manylow-lyingislandsmightdisappear.Climatezonescouldshiftlatitudebyhundredsofmiles,bringingfurtherdesertificationandaffectinggrain-producingareassuchastheGreatPlainsoftheUSA.Thereisalreadyevidenceofthefreakweatherpredictedbyscientists,suchasunpredictablerainfall,storms,anddroughts,asinEthiopiaandtheUSgrain-belt.Scientistsproposevarioussolutions.Somesuggestalimittogrowthinindustrialproduction,consumption,andpoPuladon,whi1eothersfavortechnicalsolutionssuchastransportingexcesswatertoinlandbasins,removinggreed1Ousegasesfromexhaustsbeforetheyreachtheatmosphere,orplantingmore,treestoabsorbcarbondioxide.Increaseduseofnuclearenergyandrenewableenergyistheonlyeffectivewayofreducingcarbondioxideemissions,thoughbetterenergyconservationwillalsoplayarole.
3.environment:
thephysicalsurroundingsofmorganismororganisms,includingbiological,physical,andchemicalfactors.Inthecontextofhumanecology,italsoinc
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