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1、Unit2ProtectingOurPlanetBook4ExampleAnswersThebiggestthreattobigcatsisprobablyhunting.Peoplewanttheirskins,orinsomecases,theymightthinkthebigcatsareathreattopeopleortodomesticanimals.Habitatlosscouldbeanotherfactorthatisendangeringbigcats.1.Lionsandothertypesofbi
2、gcatsaredyingatarapidrate.Whatdoyouthinkisthebiggestthreattotheseanimals?ProtectingOurPlanetExampleAnswersIfaplantspeciesbecomesextinct,thenanyinsectspeciesoranimalthatdependsonitcouldgowithoutfoodandshelter.Inaddition,plantsareimportanttothesoilandtheair,solosin
3、gaplantspeciescouldhaveseveralnegativeeffectsontheenvironment.2.Ifaplantspeciesbecomesextinct,whateffectdoesthishaveontheenvironment?ProtectingOurPlanetExampleAnswersTropicalpalmshavethegreatestpercentageofspeciesindanger,whilelobsters,ontheotherhand,havethesmall
4、estpercentageandnumberofspeciesindanger.Therefore,tropicalpalmsarethemostthreatenedandlobstersaretheleastthreatened.Whichgroupisthemostthreatened?Whichistheleast?ProtectingOurPlanetExampleAnswersAllofthecategoriesofspeciesarecommoninChinaexceptfortropicalpalms,wh
5、ichcanbeonlyseeninseveralprovinces.CoralreefsusedtobecommonintheoceansaroundChina,butamajorityofthereefshavebeendestroyedduetoover-fishingandpollution.2.WhichcategoriesofspeciesarecommoninChina?ProtectingOurPlanetAnalyticalListeningUnit2ProtectingOurPlanetListeni
6、ng1ExampleAnswers1.Theduskyseasidesparrowisnowextinct.Whatkindofhabitatdoyouthinkthisbirdlivedin?Thebirdissittingonabranch,soitmusthavelivedinplaceswithtrees.SouthernFloridaisalsoawarmplacewithalotofwetlands.Listening1ExampleAnswers2.Whatdoyouthinkaresomepossible
7、causesforitsextinction?Thebirdmayhavebecomeextinctbecauseofhabitatloss,environmentalpollution,ordisease.(It’sasmallbird,sopeoplewouldn’twanttohuntit.)A
8、Note-Taking.Listentotheguidedtourandcompletethenotes.Besuretousekeywords,abbreviations,andsymbols.Noticetheinde
9、ntations.AGuidedTourListening1EndangeredSpeciesAct(ESA)—1973Protectsanimalsandtheir________________Ex.:_________________________________Ongoingconflictbetween_
