Unit5AdelicateWorldUnderstandingideas课件-高中英语外研版选择性

33002UnderstandingideasMACQUARIEISLAND:fromChaostoConservationchaos:astateofcompleteconfusion01.Leadin

LookatthesatelliteimagesandaddsomeinformationofAral

Sea.Background:

LocatedinCentralAsia,betweenKazakhstamtothenorthandUzbekistantothesouthThefourthlargestlake(1960s)Justfoursmallerlakes(NOW)1.背景信息（Background）Location:LocatedinCentralAsia,betweenKazakhstantothenorthandUzbekistantothesouth.位置：位于中亚，北邻哈萨克斯坦，南邻乌兹别克斯坦。Pastglory:Inthe1960s,itwasthefourthlargestlakeintheworld.昔日辉煌：在20世纪60年代，它曾是世界第四大湖。Currentsituation:Now,ithasshrunkintojustfoursmallerlakes.现状：如今，它已萎缩成四个较小的湖泊。

卫星图变化解读（SatelliteImages）这三张卫星图直观地展示了咸海的萎缩过程：1990年：湖面依然广阔，水体呈深蓝色，是一个完整的大湖。2000年：湖面明显缩小，水体分裂成几部分，颜色变浅，露出大片湖底。2010年：萎缩加剧，大部分区域变成了干涸的盐滩，仅存几小片水域。Leadin

LookatthesatelliteimagesandaddsomeinformationofAral

Sea.1.Whatishappeningtotheareaaccordingtothesatelliteimages?2.Whatdoyouthinkalatersatelliteimagewouldshow?3.Whatdoyouthinkcausedthesechanges?1.Whatishappeningtotheareaaccordingtothesatelliteimages?ThesatelliteimagesshowthattheAralSeaisshrinkingdramaticallyovertime.From1990to2010,thetotalwaterareahasdecreasedsignificantly,andtheonce-largelakehassplitintoseveralmuchsmaller,disconnectedbodiesofwater.2.Whatdoyouthinkalatersatelliteimagewouldshow?Ifthetrendcontinues,alatersatelliteimagewouldlikelyshowevensmallerwaterbodies,possiblywithsomepartsofthelakecompletelydryingup.Theremainingwatermightbemorefragmented,andtheexposedseabedcouldexpandfurther.3.Whatdoyouthinkcausedthesechanges?Themaincausesare:Overuseofwaterforirrigation:Large-scaleirrigationprojects,especiallyforcottonfarming,divertedmostofthewaterfromtheAmuDaryaandSyrDaryariversthatfedtheAralSea.Poorwatermanagement:Inefficientirrigationsystemsandlackofsustainablewaterpoliciesledtomassivewaterwaste.Climatechange:Risingtemperaturesandchangingrainfallpatternshavealsocontributedtoincreasedevaporationandreducedwaterinflow.330021Whatanimalscanyouseeinthepicture?birdspenguinsThepictureistakeninMacquarie

[məˈkwɒrɪ]Island(麦夸里岛).Lookatthepicturebelowandanswerthequestions.1Pre-readingLet’sknowmoreaboutMacquarieIsland.Pre-readingPre-reading

Readthetitleandpredictthemainideaofthepassage.MacquarieIsland:

fromChaos

to

Conservationn.astateofcompleteconfusionandlackoforder.=mess,disorder/'keɪɒs/n.混乱；紊乱/kɒnsə'veɪʃn/n.（对自然环境的）保护n.protectionofthenaturalenvironment=protection33002MacquarieIsland:Chaos

toConservationfrom

Para.1Para.3Para.4Para.6a.Thebigproblembroughtbyhumans.b.ThelocationandnaturalcharacteristicsofMacquarieIsland.c.Rabbitsmultipliedandcausedsoilerosionandincreasing.d.Peopletriedtotackletheproblemandfailed.e.Theauthoristryingtotackletheproblem.f.ThesituationonMacquarieIslandwasgettingworse.Para.2Para.5PartⅠThebeautyoftheisland.theisland.PartⅡThechaoticoftheisland.PartⅢTheconservationoftheisland.Matchthemainideaswiththeirparagraphs.While-reading

Carefulreading1.ReadPara.1quicklyandfillintheblanks.IamstandingonMacquarieIsland,intheSouth-westPacificOcean,halfwaybetweenAustraliaandAntarctica.Strongwindsandstormyseashavehelpedsculptitslong,thinshape.Thegreengrassandbarerockofitslandscapecontrastdramatically,givingitawildandnaturalbeauty.NovisitorwouldthinkitsurprisingthattheislandisaUNESCOWorldHeritageSite.Norwouldtheyfailtoimaginehowitsnativeinhabitants,includingroyalpenguins,kingpenguins,andelephantseals,existedinperfectharmonywiththeirnaturalhabitatforthousandsofyears.ADDYOURTITLEHEREMacquarieIsland(麦夸里岛)LocationShapeLandscapeTitleInhabitantsinthe____________PacificOceanbetween_______________and_______shapecausedby_______windand______________________and________contrast___________a_________and________beauty________and_______penguins,_________and_________AustraliaAntarcticaPacificOceanSouth-westAustraliaAntarcticaADDYOURTITLEHEREMacquarieIsland(麦夸里岛)LocationShapeLandscapeTitleInhabitantsinthe____________PacificOceanbetween_______________and_______shapecausedby_______windand______________________and________contrast___________a_________and________beauty________and_______penguins,_________and_________South-westAustraliaAntarcticalongthinstrongstormyseasADDYOURTITLEHEREMacquarieIsland(麦夸里岛)LocationShapeLandscapeTitleInhabitantsinthe____________PacificOceanbetween_______________and_______shapecausedby_______windand______________________and________contrast___________a_________and________beauty________and_______penguins,_________and_________South-westAustraliaAntarcticalongthinstrongstormyseasgreengrassbarerockdramaticallyUNESCOWorldHeritageSiteroyalkingelephantsealsADDYOURTITLEHERE21______ontheislandand__________brought______________________developan_______unknowinglyeatattackbroughtcontrolappetite

Whatwereintroducedthen?Readpara2andcompletethemindmap.Atragicstoryarrivedintroducedrabitstotheislandasasourceof______.__

plentifulfoodforthecats.providedfood________thenumberofcats.increased_____huntParakeets________diedoutPara3:ReadPara.3quicklyandfinishthemindmap.was________to________thepopulationofprovided____foodforthecats.lessreleased_____theirattentionandtheirstomachs_____to.turnedPlanAdecreaseback_____killingwereusedto______________increasecatch_____asubstantialnumberofkilledPlanBthenumbers________onceagain.exploded

Readparagraph4~5anddrawamindmaptoshowtheirconnections.rabbitsdogs&trapsbirdspenguinsexpertcatsrats&micelessfoodkillcatchWhilethecat’saway,themicewillplayimmunity/ɪˈmjuːnəti/免疫力killexpertrabbitscatsdogs&trapsbirdsrats&micevirusdiggingthelastcatwascaughtin2000.penguins单击编辑标题单击此处可编辑内容，根据您的需要自由拉伸文本框大小单击编辑标题单击此处可编辑内容，根据您的需要自由拉伸文本框大小单击编辑标题单击此处可编辑内容，根据您的需要自由拉伸文本框大小ReadPara.6andanswerthesequestions.What’sthewriter’smission(task)ontheisland?Whatdidhumansdoontheisland?单击编辑标题单击编辑标题单击编辑标题Itis_________thathavedamagedthe__________oftheMacquarieislandanditishumans’___________________tohelpitreturntonormal.Thisinterventionisalong,much-delayedendingtoasadstory,butwehumansoweittotheislandtogiveitahappyending.humansecosystemduty/responsibilityPostscript:In2014,MacquarieIslandwasdeclaredpest-freeandtheisland’secologyisfinallyontheroadtorecovery.(

)1.Whatdoestheauthorwanttotellusinthefirstparagraph?A.MacquarieIslandisbeautiful.B.MacquarieIslandhasaworld-classname.C.TherearelotsofpenguinsonMacquarieIsland.D.ItisnoteasyforpeopletogettoMacquarieIsland.√Carefulreading(

)2.Thephrase“onceandforall”inthefifthparagraphismostlikelytomean“

”.

A.completely B.easilyC.partiallyD.skillfully√Carefulreading(

)3.Whatdoestheauthorthinkoftheformermethodsofcontrollinginvadingspecies?A.Useful.B.Creative.C.Successful.D.Negative.√(

)4.Whydoestheauthorcometotheislandthistime?A.Todosomevoluntarywork.B.Totrainherdogstocatchrats.C.Toattendameetingontheisland.D.Tocontroltheinvadingspecies.√While-reading

CarefulreadingReadpara2-6andcompletetheflowchart.

Poisonanddogswereused.Toremovealltheremaininginvadingspecies.Thisislandwaspest-freeanditsecologyisontheroadtorecovery.theytookovertheisland,eatingthebirds’eggsandattackingbabybirdsCatswerebroughttotheisland.Thecatsdevelopedanappetiteforthebirds.Rabbitswereintroduced.Toprovidefoodforhumans.morecatshuntingthebirds.Asaresult,parakeetsdiedout.Aviruswasreleasedontotheisland.Toremovealltherabbits.Substantialreductionofrabbitpopulationledtocatskillingmorenativebirds.Trapsanddogswereused.Tocatchthecats.Thedepartureofthecatsresultedinanincreasingpopulationofratsandmice.Andtherabbitpopulationexplodedonceagain.Dothepurposesandresultsmatchineverysingleaction?Para6:...wehumansoweittotheislandtogiveitahappyending.(Whoeverstartedthetroubleshouldendit!)解铃还须系铃人Choosetheauthor’spurposeinwritingthispassageandgiveyourreasons.(p68Activity3)A.ToanalysehowMacquarieIslandwassavedfromdestruction.B.ToinformreadersofthechaoscausedonMacquarieIslandbyhumans.C.ToentertainreaderwithafunnystoryaboutwhathappenedonMacquarieIsland.D.Tosuggestwaysinwhichanecosystemcanbeprotected.

APost-reading

Think&Share:1.Arethehumans’measureseffective?Why?What’stherealproblem?Thesemeasuresfailtocapturetheessenceofissue,onlysolvingthecurrenturgentproblems.Therealproblemisthatthehumanactivitiescausedthechaos.Post-reading

Think&Share:2.Howcouldsimilarsituationsbeavoidedinthefuture?Toavoidsimilarsituationsinthefuture,weshouldprotectthenaturalecosystemandbeawareofthepotentialimpactthathumanactivitiescanhaveonecosystems.Post-reading

Think&Share:3.WhatlessonscanwelearnfromMacaurieIsland’sstory?1).awareness2).action...Protectthenaturalecosystempatientlyandbecarefulofinvadingspecies.Beawareofthepotentialimpactthathumanactivitiescanhaveonecosystems.Carefulconsiderationshouldbegiventoissuesofinterventiontoecosystem.HumanbeautychaosconservationharmonyHumansbrokethe_______ofthe________balanceecosystemHumanstriedto___________the____________.c