Unit1NatureinthebalanceWeletotheunitReading課件高中英語譯林版（2020）（完整版）3

Welcometotheunit&Reading(I)Unit1

NatureinthebalanceLead-inWhatpopsintoyourmindwhenwetalkabout“balanceofnature”?Predatorandpreyinteractions(捕食者和獵物的相互作用)Predatorandpreyinteractions(捕食者和獵物的相互作用)predatorandpreybalanceHumaninterventionLead-inWhatdoestheconcept“balanceofnature”convey?Theexpressionisoftenusedoneofthetwoways.Sometimesthebalanceisdepictedasfragile,delicate,andeasilydisturbed.Othertimesit’stheopposite—thatthebalanceofnatureissopowerfulthatitcancorrectanyimbalancesonitsown.Lead-inLetusnot,however,flatterourselvesovermuchonaccountofourhumanvictoriesovernature.Foreachsuchvictorynaturetakesitsrevengeonus.—FredrichEngelsWelcometotheunitListentothesong!

WelcometotheunitWhataretherhymingwordsinthissong?harm/alarm;seas/trees;clean/green;above/love;pollution/solution.Howdoyouunderstand“harm”and“alarm”?“Harm”meanssomethingbadwehavedonetotheearth,includingpollutingsoilsandseas,cuttingdowntoomanytrees,

etc.“Alarm”meansthesignalthatwarnsusofthedangersofenvironmentaldamage,whichurgesustofindasolution.Pre-readingWhatplantsoranimalsdoyouknowabout?Whatisspecialaboutthem?ThecheetahisalargecatnativetoAfricaandcentralIran.Itisthefastestlandanimal,estimatedtobecapableofrunningat80to128km/h(50to80mph)withthefastestreliablyrecordedspeedsbeing93and98km/h(58and61mph),andassuchhasseveraladaptationsforspeed,includingalightbuild,longthinlegsandalongtail.Thecheetahisactivemainlyduringthedayandhuntingisitsmajorpreoccupation,withpeaksduringdawnanddusk.Itfeedsonsmall-tomedium-sizedprey.Para.1:IntroductiontotheAmazonrainforestPara.2:BasicinformationabouttherainforestPara.3:_____________________________________Para.4:______________________________________Para.5:______________________________________Plantbiodiversity;levelsoftherainforestAnimalbiodiversity;foodchainTherainforest’svaluetothehumanrace;threatstotherainforestCompletepartA1onpage4withthemainideaofeachparagraph.FastreadingFastreadingReadthedocumentaryscriptagaincarefullyandfillintheblankswiththefigures.Fastreading6,4006million817%20%40040,0001,300DetailedreadingReadpara.3andfigureoutdifferentlayersoftheforest.asystemofrootsthemassofleaflittershorterplantswithlargeleavestoweringancienthardwoodsthetopsofthetallesttreesJaguarsInsectsAtleast87species,includingfrogsLeavesandfruitMicroorganismsfeedon

breakdownfeedon

feedon

DetailedreadingReadpara.4andfigureoutthefoodchainofajaguar.DetailedreadingWatchavideoontropicalrainforestecosystem.FactsabouttheAmazonforest.In-depthreadingTheAmazonistheworld'sbiggestrainforest,largerthanthenexttwolargestrainforests—intheCongoBasinandIndonesia—combined.Nearlytwo-thirdsoftheAmazonrainforestisfoundinBrazil.70percentofSouthAmerica'sGDPisproducedinareasthatreceiverainfallorwaterfromtheAmazon.TheAmazoninfluencesrainfallpatternsasfarawayastheUnitedStates.Cattleranchingaccountsforroughly70percentofdeforestation(濫伐森林)intheAmazon.FactsabouttheAmazonforest.In-depthreading5.Deforestation(濫伐森林)intheAmazonrainforesthasbeendecliningsince2004,mostlyduetothefallingdeforestationrateinBrazil.Thereareavarietyofreasonsforthedecline,includingmacroeconomic(宏觀經(jīng)濟)trends,newprotectedareasandindigenous(原住民)territories,improvedlawenforcement,deforestationmonitoringviasatellite,pressurefromenvironmentalgroups,andprivatesectorinitiatives.TheAmazonisonfire!In-depthreadingTheAmazonisonfire!In-depthreadingIn-depthreadingWhatyearwilltheAmazonrainforestbegone?Arecentstudysuggeststhat21-43percentoftheAmazon'soriginalextentwillbelostby2050,puttingitcloseto,orbeyond,thetippingpointforabiome(生物群落)shiftinlargepartsoftheregion.Inadditiontothecarbonreleaseassociatedwithdeforestation,NASAhasestimatedthatifdeforestationlevelsproceed,theremainingworld'sforestswilldisappearinabout100years.In-depthreadingWhatcanwedotohelpmaintainadelicateecologicalbalance?Reduce,reuse,andrecycle.Cutdownonwhatyouthrowaway.Followthethree"R's"toconservenaturalresourcesandlandfillspace.Shopwisely.Buylessplasticandbringareusableshoppingbag.Uselong-lastinglightbulbs.Energyefficientlightbulbsreducegreenhousegasemissions.Alsoflipthelightswitchoffwhenyouleavetheroom!Plantatree.Treesprovidefoodandoxygen.Theyhelpsavee