国际交流英语视听说第4册unit2.ppt

Unit,2,ProtectingOurPlanet,Book4,ExampleAnswersThebiggestthreattobigcatsisprobablyhunting.Peoplewanttheirskins,orinsomecases,theymightthinkthebigcatsareathreattopeopleortodomesticanimals.Habitatlosscouldbeanotherfactorthatisendangeringbigcats.,1.Lionsandothertypesofbigcatsaredyingatarapidrate.Whatdoyouthinkisthebiggestthreattotheseanimals?,ProtectingOurPlanet,ExampleAnswersIfaplantspeciesbecomesextinct,thenanyinsectspeciesoranimalthatdependsonitcouldgowithoutfoodandshelter.Inaddition,plantsareimportanttothesoilandtheair,solosingaplantspeciescouldhaveseveralnegativeeffectsontheenvironment.,2.Ifaplantspeciesbecomesextinct,whateffectdoesthishaveontheenvironment?,ProtectingOurPlanet,ExampleAnswersTropicalpalmshavethegreatestpercentageofspeciesindanger,whilelobsters,ontheotherhand,havethesmallestpercentageandnumberofspeciesindanger.Therefore,tropicalpalmsarethemostthreatenedandlobstersaretheleastthreatened.,Whichgroupisthemostthreatened?Whichistheleast?,ProtectingOurPlanet,ExampleAnswersAllofthecategoriesofspeciesarecommoninChinaexceptfortropicalpalms,whichcanbeonlyseeninseveralprovinces.CoralreefsusedtobecommonintheoceansaroundChina,butamajorityofthereefshavebeendestroyedduetoover-fishingandpollution.,2.WhichcategoriesofspeciesarecommoninChina?,ProtectingOurPlanet,AnalyticalListening,Unit2ProtectingOurPlanet,Listening1,ExampleAnswers,1.Theduskyseasidesparrowisnowextinct.Whatkindofhabitatdoyouthinkthisbirdlivedin?,Thebirdissittingonabranch,soitmusthavelivedinplaceswithtrees.SouthernFloridaisalsoawarmplacewithalotofwetlands.,Listening1,ExampleAnswers,2.Whatdoyouthinkaresomepossiblecausesforitsextinction?,Thebirdmayhavebecomeextinctbecauseofhabitatloss,environmentalpollution,ordisease.(Itsasmallbird,sopeoplewouldntwanttohuntit.),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,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?,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.,ExampleAnswer1Idothinkthathuntingshouldbeallowedinourarea.Wewouldneedtocreaterulestoprohibitthehuntingofendangeredspecies,andalsotorequirehunterstoonlykilltheanimalsoftherightageandsex,andonlyattherighttimeoftheyear.,Listening2,1.Doyouthinkthathuntingshouldbeallowedinyourarea?Ifyes,whathuntingruleswouldyoumake?Ifno,whynot?,Listening2,1.Doyouthinkthathuntingshouldbeallowedinyourarea?Ifyes,whathuntingruleswouldyoumake?Ifno,whynot?,ExampleAnswer2Idontthinkthathuntingshouldbeallowedinourareabecausethereisverylittlewildlifeleft,andveryfewwildareaswhereanimalscanlive.Huntingwouldjustbemorepressureonthesurvivalofanimalspecies.,ExampleAnswer1Idothinkthegovernmentshouldtrytoconvincemoreyoungpeopletotakeuphuntingbecausebeingoutdoorsteachespeopleaboutnature.Ifpeoplelovenature,theywillbemorewillingtoprotectit.Huntingcanalsobeagoodactivityforfamiliestodotogether.,Listening2,2.Somegroupsbelievethatteachingchildrenandteenagersabouthuntingwillmakethemresponsiblehuntersasadults.Shouldthegovernmenttrytoconvincemoreyoungpeopletotakeuphunting?Whyorwhynot?,Listening2,2.Somegroupsbelievethatteachingchildrenandteenagersabouthuntingwillmakethemresponsiblehuntersasadults.Shouldthegovernmenttrytoconvincemoreyoungpeopletotakeuphunting?Whyorwhynot?,ExampleAnswer2Idontthinkthegovernmentshouldtrytoconvincemoreyoungpeopletotakeuphuntingbecausehuntingisapracticethatisntanecessityinthemodernworld.Peopleshouldeatfoodraisedbyfarmersinsustainableways.Thereisnoneedforustodisturbwildanimalsinhabitatsthataregettingsmallereveryyear.,LanguageFunctionIntroducingExamplesWeusemanyexpressionstointroduceexamples.Mostofthemareplaceddirectlybeforetheexample.Ivevisitedmanynationalparks,forexample,ShenandoahandYosemite.Theresawidevarietyofanimalsthereforinstance,bison(美洲野牛)andwolves.AlligatorsthriveinhabitatssuchastheEverglades.TheEvergladesishometomanyspeciesofwildlife,includingtheFloridapanther(黑豹)andtheAmericanalligator.,Tobecontinued,LanguageFunctionIntroducingExamples(Continued)Afewexpressionsmaybeplacedaftertheexamples,especiallyincasualspeeches.IvevisitedmanynationalparksShenandoahandYosemite,forexample.Theresawidevarietyofanimalstherebisonandwolves,forinstance.,B|UsingaDictionary.Somewordshavemorethanonemeaning.Withyourpartner,readthesesentencesfromthevideo.Noticetheunderlinedwordsandphrases.Thenreadthedefinitions.Therearetwodefinitionsforeachwordorphrase.Choosethedefinitionthatfitsthesentencefromthevideo.Useyourdictionarytohelpyou.,BeforeViewing,1.Theonlychancethemuggerhasinthewildishere,inSriLanka.a.acriminalwhorobsothersinpublicb.acrocodileofsouthernAsia,b,B|UsingaDictionary.,BeforeViewing,2.Iftheydieouthere,theyreprobablygoneforgood.a.forever,permanentlyb.sothatthingswillbebetter3.Thewinnergetstheprizehispickofthefemales.a.asharp,pointedtoolb.choice4.Muggershavebeenactingoutthisritualformorethan100millionyears.a.aprocedureforareligiousceremonyb.anactivityorbehaviorthathappensoften,a,b,b,A|Note-Taking.Watchthefirstpartofthevideo.Completethenoteswithwordsfromthebox.,WhileViewing,Tobecontinued,1.Increased_populationsless_foranimals2.India:bigproblemfor_3.RomWhitakerwantstosavethe_crocodile.4.Indianwetlandsarenow_andfarms.,human,habitats,crocodiles,mugger,ricefields,A|Note-Taking.Watchthefirstpartofthevideo.Completethenoteswithwordsfromthebox.,Tobecontinued,5.MadrasCrocodileBankworldslargest_pop.ofmuggers6.Cantletthemgonoplaceforthemin_,captive,India,WhileViewing,B|Note-Taking.SomeNote-Taking.Watchthenextpartofthevideo.Completethenoteswithoneortwowordsyouhear.,thelowlands,afew,30,RomWhitaker,wild,WhileViewing,A|Collaboration.Withyourpartner,thinkoffourquestionsyouwouldliketoaskRomWhitakeraboutthefutureofthemuggercrocodiles.,AfterViewing,ExampleAnswers1.WhydontwildmuggersliveinIndiaanymore?2.HowdothemuggerssurviveinSriLanka?3.Whyisthemuggerssurvivalimportant?4.Isthereanythingpeoplecandotohelpthemuggerssurvive?,AfterViewing,ExampleAnswers1.Q:WhydontwildmuggersliveinIndiaanymore?A:Thehabitatisgonenow.Indiaspopulationhasgrown,andtheformercrocodilehabitatisnowfarmsandricefields.2.Q:HowdothemuggerssurviveinSriLanka?A:Longago,farmersherecreatedlakesandpondsintheforesttoirrigatetheircrops.Thecrocodilescanusethoseashabitatinsteadofnaturalwetlands.,AfterViewing,Tobecontinued,ExampleAnswers(continued)3.Q:Whyisthemuggerssurvivalimportant?A:Likeanylarge,predatoryanimal,themuggerplaysanimportantroleintheecosystembypreventingtheoverpopulationofotheranimalspecies.4.Q:Isthereanythingpeoplecandotohelpthemuggerssurvive?A:Peoplecaneducatethemselvesaboutanimalspeciessuchasthisone.Eventhoughtheyrenotcute,crocodilesareimportanttolifeonEarth.,AfterViewing,A|EvaluatingArguments.Readthearguments.Aretheseargumentsfororagainstkeepinganimalsinzoos?WriteFiftheargumentisforzoosorAiftheargumentisagainstzoos.,ParticipatingaDebate,_1.Animalsdonothaverights,soitisacceptableforpeopletokeeptheminzoos._2.Zooseducatepeopleabouthowtoprotectendangeredspecies._3.Inmanyzoos,animalsarekeptinsmallcagesandcannotmovearound._4.Itcostsalotofmoneytokeepanimalsinzoos.,F,F,A,A,ParticipatingaDebate,_5.Itisfuntoseeinterestingandunusualanimalsinzoos._6.Zoosprotectanimalsthatarehuntedillegally,suchasrhinos(犀牛)andelephants._7.Peoplecanbeeducatedaboutanimalswithoutkeepinganimalsinzoos._8.Theartificialenvironmentofazooisverystressfulformanyanimals.Theyoftenstopeating.,A|EvaluatingArguments.Readthearguments.Aretheseargumentsfororagainstkeepinganimalsinzoos?WriteFiftheargumentisforzoosorAiftheargumentisagainstzoos.,F,F,A,A,A|Readthestatements.Thenlistentoaconversationaboutsavingthewhalesandcheck()TfortrueorFforfalse.,Listening1,1.Mostspeciesofthebaleenwhalesarenowendangered.2.Anumberofcountriescontinuewithcommercialwhalingsimplybecausethereisnopolicyagainstit.3.Californiagraywhalesarenowextinct.4.Accordingtotheconversation,wecanhelpbydonatingmoneytotheconservationorganizations.,TF,Listening1,AnswerKeys1.T2.F(Theyhavechosentoviolatetheruleandcontinuetokillwhales.)3.F(GraywhaleswereremovedfromtheEndangeredSpeciesList.)4.F(Wecanhelpbylearningaboutwhalesandtheirhabitats,donatingourtimetoconservationorganizations,andalteringourbehaviortocreateaslittlewasteaspossible.),B|Readthequestions.Thenlistenagainandcompletethesentenceswithwhatyouhear.,Listening1,1.Theendangeredstatusofwhalesistheresultof_inthe19thand20thcenturies,whenwhaleswereexploitedfor_.2.Today,threatstowhalesinclude_,_and_.3.Whalepopulationsma