国际交流英语视听说B4U2ppt课件

,Unit,2,ProtectingOurPlanet,Book4,ThinkandDiscuss,ViewingtheWorld,ExploringtheTheme,AnalyticalListening,SharingYourIdeas,Engaging,FurtherListening,Content,ThinkandDiscuss,Unit2ProtectingOurPlanet,Questions,Anendangeredturtlefloatsoveradeadcoralreef.,1.Lookatthephotoandreadthecaption.Whatdoyouimaginethisscenelookedlike50or60yearsago?Whatcausedthechange?2.Whataresomereasonsthatanimalsbecomeextinct?3.Whodoyouthinkshouldberesponsibleforprotectingendangeredspecies?Governments?Companies?Citizens?,ExampleAnswersFiftyor60yearsago,thescenewasprobablymuchmorecolorful,withdifferentspeciesoflivecoralanddifferentkindsoffish.Thedamagewasprobablycausedbyhumanactivitiessuchascommercialfishingorscubadiving.Risingoceantemperaturesfromglobalwarmingcanalsocausethedeathofcoralreefs.,Questions,1.Lookatthephotoandreadthecaption.Whatdoyouimaginethisscenelookedlike50or60yearsago?Whatcausedthechange?,ExampleAnswersSpeciescanbecomeextinctduetoover-huntingorover-fishing,climatechange,lossofhabitat,orcompetitionfrominvasivespecies.,Questions,2.Whataresomereasonsthatanimalsbecomeextinct?,ExampleAnswer1Ithinkgovernmentsshouldberesponsibleforprotectingendangeredspeciesbecausetheyhavethepowertopassandendorselawsthatprotectthespecies.,Questions,3.Whodoyouthinkshouldberesponsibleforprotectingendangeredspecies?Governments?Companies?Citizens?,ExampleAnswer2Ithinkcompaniesshouldberesponsibleforprotectingendangeredspeciesbecausetheysometimescauseenvironmentaldamage,andtheyhavefinancialresources.Savinganendangeredspeciesmightalsobegoodforacompanyspublicimage.,Questions,3.Whodoyouthinkshouldberesponsibleforprotectingendangeredspecies?Governments?Companies?Citizens?,ExampleAnswers3Ithinkcitizensshouldberesponsibleforprotectingendangeredspeciesbecausegovernmentsandcompanieshavenotdoneenough.Citizensshouldjointogethertoprotectthesespeciesthrougheducationandpublicpressureoncompaniesandgovernments.,Questions,3.Whodoyouthinkshouldberesponsibleforprotectingendangeredspecies?Governments?Companies?Citizens?,ExploringtheTheme,Unit2ProtectingOurPlanet,ProtectingOurPlanet,InternationalUnionforConservationofNature(IUCN):theworldsoldestandlargestglobalenvironmentalorganizationfoundedin1948.Withmorethan1,200memberorganizations,todayitisaleadingauthorityontheenvironmentprotectionandsustainabledevelopment.Almost11,000scientistsandexpertsfromtheworlddovolunteerworkforit.世界自然保护联盟,A|Lookatthephotosandreadthecaptions.Thendiscussthequestions.,1.Lionsandothertypesofbigcatsaredyingatarapidrate.Whatdoyouthinkisthebiggestthreattotheseanimals?2.Ifaplantspeciesbecomesextinct,whateffectdoesthishaveontheenvironment?,ProtectingOurPlanet,AnAfricanlionrestsnearatreeinBotswana.Overthepast20years,manyAfricanlionshavedied.,ProtectingOurPlanet,Aroundtheplanet,humanimpacthasresultedinthedestructionofanimalandplantlife.Nowconservationistsaretryingtosavetheseplantsandanimalsfromextinction.Onceaplantoranimalisextinct,therewillbenolivingmembersofthatspeciesleftontheplanet.,ProtectingOurPlanet,Aroundtheplanet,humanimpacthasresultedinthedestructionofanimalandplantlife.Nowconservationistsaretryingtosavetheseplantsandanimalsfromextinction.Onceaplantoranimalisextinct,therewillbenolivingmembersofthatspeciesleftontheplanet.,ProtectingOurPlanet,ExampleAnswersThebiggestthreattobigcatsisprobablyhunting.Peoplewanttheirskins,orinsomecases,theymightthinkthebigcatsareathreattopeopleortodomesticanimals.Habitatlosscouldbeanotherfactorthatisendangeringbigcats.,1.Lionsandothertypesofbigcatsaredyingatarapidrate.Whatdoyouthinkisthebiggestthreattotheseanimals?,ProtectingOurPlanet,ExampleAnswersIfaplantspeciesbecomesextinct,thenanyinsectspeciesoranimalthatdependsonitcouldgowithoutfoodandshelter.Inaddition,plantsareimportanttothesoilandtheair,solosingaplantspeciescouldhaveseveralnegativeeffectsontheenvironment.,2.Ifaplantspeciesbecomesextinct,whateffectdoesthishaveontheenvironment?,ProtectingOurPlanet,B|Lookatthechart.Thendiscussthequestions.,Eachyear,theInternationalUnionforConservationofNaturestudiesplantsandanimals.Manyofthespeciesstudiedarethreatenedoratriskofdying.Thegraphshowsthepercentageofthreatenedspeciesineachcategory.Thenumbersatthetopofthebarsshowhowmanyspecieswerestudied.,ProtectingOurPlanet,1.Whichgroupisthemostthreatened?Whichistheleast?2.WhichcategoriesofspeciesarecommoninChina?,ProtectingOurPlanet,ExampleAnswersTropicalpalmshavethegreatestpercentageofspeciesindanger,whilelobsters,ontheotherhand,havethesmallestpercentageandnumberofspeciesindanger.Therefore,tropicalpalmsarethemostthreatenedandlobstersaretheleastthreatened.,Whichgroupisthemostthreatened?Whichistheleast?,ProtectingOurPlanet,ExampleAnswersAllofthecategoriesofspeciesarecommoninChinaexceptfortropicalpalms,whichcanbeonlyseeninseveralprovinces.CoralreefsusedtobecommonintheoceansaroundChina,butamajorityofthereefshavebeendestroyedduetoover-fishingandpollution.,2.WhichcategoriesofspeciesarecommoninChina?,ProtectingOurPlanet,AnalyticalListening,Unit2ProtectingOurPlanet,Listening1,duskyseasidesparrown.海滨灰雀（主要分布在美国佛罗里达州的梅里特岛，已经绝迹）habitatn.（植物的）生长地；（动物的）栖息地MerrittIsland梅里特岛（位于美国东部佛罗里达州）steelheadtroutn.硬头鳟enforcev.执行，实施（规定或法律）Idaho爱达荷州（美国西北部州）deforestationn.砍伐树林buckwheatn.荞麦,Listening1,EndangeredSpeciesAct(ESA):aU.S.environmentallawwhichwaspassedin1973.Itwasdesignedtohelpprotectplantsandanimalsthatarethreatenedbyextinctionasaresultofhumanactivities.濒危物种法案,Listening1,A|PredictingContent.Formagroupwithtwoorthreeotherstudents.Lookatthephotosandreadthecaption.Thendiscussthequestionsbelow.,Listening1,TheduskyseasidesparrowwasabirdspeciesofsouthernFlorida.,A|PredictingContent.,Listening1,1.Theduskyseasidesparrowisnowextinct.Whatkindofhabitatdoyouthinkthisbirdlivedin?2.Whatdoyouthinkaresomepossiblecausesforitsextinction?,Listening1,ExampleAnswers,1.Theduskyseasidesparrowisnowextinct.Whatkindofhabitatdoyouthinkthisbirdlivedin?,Thebirdissittingonabranch,soitmusthavelivedinplaceswithtrees.SouthernFloridaisalsoawarmplacewithalotofwetlands.,Listening1,ExampleAnswers,2.Whatdoyouthinkaresomepossiblecausesforitsextinction?,Thebirdmayhavebecomeextinctbecauseofhabitatloss,environmentalpollution,ordisease.(Itsasmallbird,sopeoplewouldntwanttohuntit.),B|Note-Taking.Listentothefirstpartofaguidedtourandlookatastudentsnotes.Noticetheuseofkeywords,indentations,abbreviations,andsymbols.,Listening1,C|PairWork.Workwithapartner.UsingthenotesfromexerciseB,retellthefirstpartoftheguidedtourincompletesentences.Useyourownwords.,Listening1,Listening1,ExampleAnswersThedeadbirdinthejaristheduskyseasidesparrow,asmallbirdthatlivedonMerrittIslandinsouthernFlorida,butwhichisnowextinct.Thespeciesbecameextinctwhenpeopleusedchemicalstokillthemosquitosontheisland.Thosechemicalsalteredthewetlandssotheywerenolongeragoodhabitatforthesparrow.,TourGuide:OK,everyone,heresournextexhibit.Doyouseethebodyofthelittlebirdinthatbottle?Thatisaduskyseasidesparrow.ItwasanoldmalethatdiedonJune16,1987.Itskindofsadbecausehewastheverylastduskyseasidesparrowintheworld.Theyrenowextinct.Yes,youhaveaquestion?Male:Doyouknowwhytheybecameextinct?TourGuide:Basically,theylosttheirhabitat.See,theduskyseasidesparrowlivedonlyinoneplaceonMerrittIslandinFlorida.Theislandhadalotofmosquitoesandwetlands.ThepeopleonMerrittIslandusedchemicalstokillthemosquitoes.Thosechemicalswerealsoveryharmfultothesparrows,andmanydied.Inaddition,thepeopleonMerrittIslandtriedtocontrolandexploitthewetlands.Astheyalteredthem,thewetlandswerenolongeragoodhabitatforthesparrows.Thebirdsdiedonebyoneuntiltherewerentanyleft.,Listening1,A|Note-Taking.Listentotheguidedtourandcompletethenotes.Besuretousekeywords,abbreviations,andsymbols.Noticetheindentations.,AGuidedTour,Listening1,EndangeredSpeciesAct(ESA)1973Protectsanimalsandtheir_Ex.:_Ongoingconflictbetween_and_Ex.:_ESAprotects_;ranchersfeellawviolates_,habitats,steelheadtroutinWashingtonstate,landowners,government,graywolfinWyomingandIdaho,land,theirrights,A|Note-Taking.,Listening1,EndangeredSpeciesTodaySituationtodayis_thanin19731._specieslistedas_or_2.Since1973only_speciesremovedfromlist3.BUTonly_removedbecausetheyrecovered;_becameextinct,otherslistedbymistake4._morespeciesmaysoonbeaddedtolist,worse,1,300,endangered,threatened,39,14,9,300,A|Note-Taking.,Listening1,ConclusionEvenw/ESAinplace,_,notmakingmuchprogress,Listening1,B|ListeningforMainIdeas.Readthequestionsandanswerchoices.Thenlistenagainandchoosethecorrectanswers.UseyournotesfromexerciseAtohelpyou.,1.Whatisthemaintopicofthetalk?a.Whytheduskyseasidesparrowbecameextinct.b.Thedifficultiesofprotectingbothanimalsandtheirhabitats.c.ReasonsthattheEndangeredSpeciesActisntworking.,b,Listening1,B|ListeningforMainIdeas.Readthequestionsandanswerchoices.Thenlistenagainandchoosethecorrectanswers.UseyournotesfromexerciseAtohelpyou.,2.WhatdoestheEndangeredSpeciesActprotect?a.Endangeredanimalsandtheirhabitats.b.Endangeredanimalsbutnottheirhabitats.c.Animalhabitatsbutnotendangeredanimals.,a,Listening1,B|ListeningforMainIdeas.Readthequestionsandanswerchoices.Thenlistenagainandchoosethecorrectanswers.UseyournotesfromexerciseAtohelpyou.,3.WhathashappenedsincethepassageoftheEndangeredSpeciesAct?a.Thenumberofspeciesthatareendangeredhasgreatlydecreased.b.Thenumberofspeciesthatareendangeredhasincreasedalot.c.Thenumberofspeciesthatareendangeredhasnotchangedmuch.,c,Listening1,TheMiamibluebutterfly,Discussion.Workwithyourpartner.Howmighttheextinctionoftheduskyseasidesparrowhavebeenprevented?Explainyourideas.,TourGuide:OK,everyone,heresournextexhibit.Doyouseethebodyofthelittlebirdinthatbottle?Thatisaduskyseasidesparrow.ItwasanoldmalethatdiedonJune16,1987.Itskindofsadbecausehewastheverylastduskyseasidesparrowintheworld.Theyrenowextinct.Yes,youhaveaquestion?Male:Doyouknowwhytheybecameextinct?TourGuide:Basically,theylosttheirhabitat.See,theduskyseasidesparrowlivedonlyinoneplaceonMerrittIslandinFlorida.Theislandhadalotofmosquitoesandwetlands.ThepeopleonMerrittIslandusedchemicalstokillthemosquitoes.,Tobecontinued,Listening1,TourGuide:Thosechemicalswerealsoveryharmfultothesparrows,andmanydied.Inaddition,thepeopleonMerrittIslandtriedtocontrolandexploitthewetlands.Astheyalteredthem,thewetlandswerenolongeragoodhabitatforthesparrows.Thebirdsdiedonebyoneuntiltherewerentanyleft.Female:So,ifpeopleweretoblame,cantwemakesuresomethinglikethatneverhappensagain?TourGuide:Weretrying.Thesituationwiththeduskyseasidesparrowmakesonethingveryclear.Weneedtoprotectendangeredanimals.However,itsabetterstrategytoprotecttheanimalsandtheirhabitats,too.Afterall,ifananimalshabitatisdestroyed,theanimalwilllikelybecomeextinct.,Tobecontinued,Listening1,TourGuide:Weretrying.Thesituationwiththeduskyseasidesparrowmakesonethingveryclear.Weneedtoprotectendangeredanimals.However,itsabetterstrategytoprotecttheanimalsandtheirhabitats,too.Afterall,ifananimalshabitatisdestroyed,theanimalwilllikelybecomeextinct.ThatswhytheEndangeredSpeciesAct,whichwaspassedintheUnitedStatesin1973,protectsbothendangeredanimalsandtheirhabitats.Forexample,thesteelheadtroutlivesinriversandstreamsonthewestcoastoftheUnitedStatestheColumbiaRiverinWashingtonstateforinstance.Recently,boththefishandtherivercameundertheprotectionoftheEndangeredSpeciesAct.,Tobecontinued,Listening1,Male:Buthowcanweprotectlargeareassuchasriversandforests?Noonenoteventhegovernmentcanaffordtobuyorcontrolallthelandthatendangeredspeciesliveon.TourGuide:Goodpoint.Infact,thatswhatmakestheEndangeredSpeciesActdifficulttofullyenforce.Theresanongoingconflictbetweensomelandownersandthegovernment.Takethecaseofthegraywolf,forinstance.Atonetime,thewolveswerecommonalloverNorthAmerica,butbythe1930stheywerenearlyallkilled.Thenin1973,thewolvescameundertheprotectionoftheEndangeredSpeciesAct,alongwithhugeareasoflandinWyomingandIdaho,forexample.Thisangeredranchers.Theythinktheyshouldhavetherighttoshootwolvesthatthreatentheirsheepandcows.,Tobecontinued,Listening1,TourGuide:So,landownersmayunderstandtheneedfortheprotectionofendangeredspecies,butitsunderstandablethattheymightalsofeelthattheEndangeredSpeciesActviolatestheirrights.Yes?Female:Isthelawworking?Imean,whatisthestatusofendangeredspeciestodayintheUnitedStates?TourGuide:Unfortunately,thesituationofthreatenedandendangeredanimalsisworsenowthanin1973,evenwiththeEndangeredSpeciesActinplace.Reportsontopicssuchashabitatloss,deforestation,andoverfishingshowthatthesituationformanyspeciesisfarworsenowthanitwasin1973.Letmebemorespecific.Rightnowover1,300speciesintheUnitedStatesarelistedasendangeredorthreatened.,Listening1,Tobecontinued,TourGuide:And,itsimportanttokeepinmindthatnotmanyspeciesareevertakenoffthelist.Since1973,infact,onlyaround39specieshavebeenremovedfromtheEndangeredSpecieslist.Butthatnumberdoesntindicatethecompletestory.Whatssignificantaboutthatnumberisthatonly14specieswereremovedbecausetheyhadactuallyrecovered.Ninespeciesbecameextinct,andtheotherswereremovedfromthelistafterscientistsfoundevidencethatlistingthespecieshadbeenamistakeinthefirstplace.Meanwhile,another300speciesmaysoonbeaddedtothelist,includingaplant,theLasVegasbuckwheat,andaninsect,theMiamibluebutterfly.So,yousee,evenwiththeEndangeredSpeciesActinplace,werenotmakingasmuchprogressaswewouldlike.Anymorequestions?OK,letsmoveontothenextexhibit.Thisway,please.,Listening1,Listening2,elkn.驼鹿；麋Yumi由美（人名）Raoul拉乌尔（人名）hectaren.公顷（相当于10,000平方米）outlawv.将（某事）定为非法posev.（使）摆好姿势Virginia弗吉尼亚州（美国州名）,Listening2,YosemiteNationalPark:scenicmountainregionineast-centralCalifornia,U.S,whichissurroundedonallsidesbynationalforestlandsandencompasses1,189squaremiles.Itisinternationallyrecognizedforitsspectacularcliffs,waterfalls,clearstreams,andbiologicaldiversity.ItwasdesignatedaUNESCOWorldHeritagesitein1984.约塞米蒂国家公园,Listening2,ShenandoahNationalPark:anationalparkintheU.S.stateofVirginia.ItcoverspartoftheBlueRidgeMountains(蓝领山脉)andisfamousforitswonderfulscenery.谢南多厄国家公园,Listening2,DuckStamp:astampwhichisissuedintheU.S.bythestateandnationalgovernments.Thestampisrequiredtohuntwaterfowl(水鸟),andmoneyfromsellingthestampsgoestosupportthewetlandswherewaterfowllive.美国联邦鸭票,Listening2,Huntersandtheirdogslookforanimals.,PriorKnowledge.Discussthequestionswithapartner.,Listening2,1.Ducks,quail,turkeys,andpheasantsarepopularbirdstohunt.Elkanddeerarepopularfour-leggedanimalstohunt.Whatotheranimalsdoyouknowthatarehunted?2.Haveyouevergonehunting?Ifyouhave,didyoulikeit?Ifyouhavent,wouldyouliketotryit?Whyorwhynot?,Listening2,ExampleAnswersDependingontheplace,peoplealsohuntrabbits,squirrels,bears,moose,lions,elephants,alligators,andotheranimals.,1.Ducks,quail,turkeys,andpheasantsarepopularbirdstohunt.Elkanddeerarepopularfour-leggedanimalstohunt.Whatotheranimalsdoyouknowthatarehunted?,Listening2,ExampleAnswer1Yes,Ihave.IlikeditbecauseIenjoybeingoutdoors,anditwasexcitingtolookforananimal,evenifIdidntkillone.,2.Haveyouevergonehunting?Ifyouhave,didyoulikeit?Ifyouhavent,wouldyouliketotryit?Whyorwhynot?,Listening2,ExampleAnswer2Yes,Ihave.Ididntlikeitbecausetherealityofkillingandprocessingananimalforfoodwasunpleasant.,2.Haveyouevergonehunting?Ifyouhave,didyoulikeit?Ifyouhavent,wouldyouliketotryit?Whyorwhynot?,Listening2,ExampleAnswer3No,Ihavent.IwouldliketogobecauseIwanttolearnhowtouseagunintherightway.,2.Haveyouevergonehunting?Ifyouhave,didyoulikeit?Ifyouhavent,wouldyouliketotryit?Whyorwhynot?,Listening2,ExampleAnswer4No,Ihavent.IwouldntliketogobecauseIthinkkillinganimalsisverycruel.Besides,IappreciateanimalsandIdonteatthem.,2.Haveyouevergonehunting?Ifyouhave,didyoulikeit?Ifyouhavent,wouldyouliketotryit?Whyorwhynot?,AStudentDebateA|ListeningforKeyConcepts.Listentotwoclassmatesdebatingaboutlegalizedhunting.Whospeaksinfavorofit?Whospeaksagainstit?,Listening2,Listening2,ExampleAnswersThewoman(Yumi)speaksinfavorofhunting.Theman(Raoul)speaksagainsthunting.,B|Note-Taking.Listenagain.Takenotesonthespeakersargumentsforandagainsthunting.Alsotakenotesontheirresponsestoeachothersarguments.,Listening2,Listening2,ExampleAnswersYumisArgumentsforHuntingHuntinghelpscontrolanimalpops.Hunterslicensefeeshelppayforanimalconservation.RaoulsArgumentsagainstHuntingSomehuntersareirresponsible.Huntingiscruelandcausespainandsufferingtoanimals.Thereisalotofillegalhunting.,Tobecontinued,Listening2,ExampleAnswers(Continued)YumisResponsestoRaoulNaturalpredatorsalsoeatcowsandsheep.Cowsalsosufferwhentheyarekilledforfood.Mosthuntersarelawabidingandkillonlywhattheycaneat.RaoulsResponsestoYumiTouristscanalsopaytoraisemoneyforanimalconservation.,C|PairWork.Withyourpartner,compareyournotesfromexerciseB.Restatetheargumentsforandagainsthuntinginyourownwords.,Listening2,Listening2,ExampleAnswersAccordingtoYumi,legalizedhuntingisgoodfortwomainreasons.First,ithelpscontrolanimalpopulations,soanimalsdontbecomeoverpopulatedandstarvetodeath.Second,legalizedhuntingraisesalotofmoneythatisusedforwildlifeconservationthroughthesaleofhuntingstamps.AccordingtoRaoul,legalizedhuntingisntgoodbecausesomehuntersareirresponsible.Theyhunttoomanyanimalsorkillthemoutofseason.Healsosaysthathuntingiscrueltoanimalssincesomehuntersletanimalsdieslowly.,D|Discussion.Referbacktothedebate.Whichspeakerdoyouthinkpresentedstrongerarguments?Explainyouropiniontoyourpartner.,Listening2,Listening2,ExampleAnswersIthinkYumipresentedstrongerargumentsbecauseherideasreflectrealitybetterthanRaouls.Withagrowinghumanpopulation,animalpopulationsdoneedtobecontrolled,anditmakessensetoraisemoneyforconservationfromhunterswholovetheoutdoors.IthinkRaoulpresentedstrongerargumentsbecausehisideasaremeanttoimprovethecurrentsituation.Animalpopulationsdoneedtobecontrolled,butthatisthefaultofhumanbeings.Wecancorrectourpreviousmistakesbyhelpingthepopulationofpredatoryanimalstorecover.Wecanalsobecreativeinfindingwaystoraisemoneyforconservationfromotherpeoplewholovetheoutdoorsnotjustfromhunters.,Listening2,CriticalThinking.Formagroupwithanotherpairofstudents.Thendiscussthequestions.,1.Doyouthinkthathuntingshouldbeallowedinyourarea?Ifyes,whathun