Unit+5+A+delicate+world+Developing+ideas 高中英語外研版（2019）選擇性必修第二冊

ADelicateWorldWhatisanecosystem(生態(tài)系統(tǒng))?Howmanyecosystemsdoyouknow?WarmingupAwonderfulserenityhastakenpossesstundra/'t?ndr?/凍原glassland溫帶草原AwonderfulserenityhastakenpossessAwonderfulserenityhastakenpossessdesert/?dez?t/沙漠Warmingupwetlands濕地tropicalrainforests熱帶雨林Theenvironmentwheredifferenttypesofplants,animalsandspecieslive.Differentkindsofanimalsandplantsinabalancedenvironment.EcosystemBiodiversityMatchthedefinitions（定義）withtheterms

(術(shù)語).生態(tài)系統(tǒng)生物多樣性The_______(more/less)differentkindsoflivingthingsinthe____________,themoresuccessfulitis.moreecosystemWarmingupAralSea咸海Activity4WatchandthinkWhatisthelakeinthepictures?WatchthechangeofAralSeaandbepreparedtoanswersomequestions.Activity4WatchandthinkLookatthesatelliteimagesandanswerthequestions(Ex2).1)Whatishappeningtotheareaaccordingtothesatelliteimages?2)Whatdoyouthinkalatersatelliteimagewouldshow?3)Whatdoyouthinkcausedthesechanges?Thewaterareaisshrinking.Thewaterareawillbesmaller.Perhapsbecauseofhumanover-exploitation.Activity4WatchandthinkWatchthevideoandanswerthequestions(Ex1).1ArehumanspartofEarth’secosystems?Why?2Inwhatwayscanhumansaffectecosystems?Activity2WatchandanswerWhatroledoyouthinkhumansshouldplayinkeepingthebalanceofecosystems?Activity5SpeakingGroupdiscussionWeandotherlivingthings,suchasplants,animals,insectsarelivingonthisplanettogether!Wedependoneachothertolive.That’showecosystemswork!Whatanimalscanyouseeinthepicture?Whatkindofchangeswouldtakeplaceifcats,ratsandrabbitswereintroducedtoanenvironmentlikethis?Activity1Lead-inLookatthepictureandanswerthequestions(Ex1):Penguinsandbirds.MacquarieIslandfromChaostoConservationUnderstandingideasWatchthevideoandlearnmoreaboutmacquarieisland.ReadforstructureMacquarieIsland:fromChaostoConservationPart1Para____:Part2Paras_____:Part3Paras_____:the_________oftheislandthe_______________oftheislandthe________________oftheisland1beauty2-3chaos4-6conservationDivideitintothreeparts,andgetthemainideaofeachpart.Thepassageisdevelopedintheorderof_____.timeALocationBShapeCLandscapeThebeautyoftheislandInthe__________________ocean,halfwaybetween___________and_____________.longandthinWhy?strongwindsandstormyseasgreengrass;barerock;awildandnaturalbeautyDInhabitantsroyalpenguins;kingpenguins;elephantsealsSouth-westPacificReadfordetails(細(xì)節(jié))Para.1wildnaturalharmoniousWorldHeritageSitebeautyAustraliaAntarcticaReadpart2(Paras.2-3)andfinishthefollowingtasks.thechaosoftheisland1.Whatwasbroughttotheisland?rats&micecatsrabbits2.Whathappenedaftertheyreachedtheisland?tookover…ate…attacked…atebirdsmultipliedatevegetationdigholessoilerosionmorecatshavea______effectonecologybad！humansHumans’__________actionscareless16______ontheislandand__________brought______________________developan_______unknowinglyeatattackbroughtcontrolappetite

Whatwereintroducedthen?AtragicstoryarrivedSummary

theconservationoftheislandTimeMeasure(s)Purpose(s)Result(s)Readpart3(paras.4-6)&postscript,

andfillintheblanks.afterthe1970sinthe1980safter2006release_______use__________droppoison,use_______toremoverabbitsto_______toremoveinvadingspeciesfewer_________but_____birdspestfewercatsno____but______rats______rabbitslandcollapsemoremore_____freein2014virustraps&dogsdogscatchcatsrabbitsintime?proper?tosolveitonceandforallHumans’____________measuresmaydogreaterharmtoecology.improperlessfoodkillcatchWhilethecat’saway,themicewillplayimmunity/??mju?n?ti/免疫力killexpertrabitscatsdogs&trapsbirdsrats&micevirusdiggingthelastcatwascaughtin2000.penguinsSummaryItis_________thathavedamagedthe__________oftheMacquarieislandanditishumans’_________tohelpitreturnto________.Thisinterventionisalong,much-delayedendingtoasadstory,butwehumansoweittotheislandtogiveitahappyending.humansecosystemdutynormalPostscript:In2014,MacquarieIslandwasdeclaredpest-freeandtheisland’secologyisfinallyontheroadtorecovery.WhileReadingHumanbeautySummarychaosconservationharmonyHumansbrokethe_______ofthe________balanceecosystemHumanstriedto_________the_______conserveecosystemItishumansthathavedamagedtheecosystemoftheMacquarieislandanditishumans’dutytohelpitreturntonormal.

MacquarieIslandtakesonalong,thinshape,1.

isbecauseofstrongwindsand2.

(storm)seas.ItisaUNESCOWorldHeritageSite.Itsnativeinhabitantsexistedinperfectharmonywiththeirnaturalhabitatforthousandsofyears.In1810,humansarrivedontheislandwithratsandmiceunknowingly.Theseanimalsquicklytookovertheisland,3.

(bring)disasterstobirds.Unfortunatelycats4.

(intend)tocontrolratsandmicedevelopedanappetiteforbirds,too.Later,rabbits5.

(introduce)buttheyledtogreaterdamagetotheisland.Expertscameupwithaplantoreleaseavirus6.

(kill)therabbits,butafterwards,theydevelopedanimmunity7.

thevirus,andtheir8.

(number)explodedonceagain.Thisincidentmade9.

clearthattherat,mouseandrabbitproblemneededsolvingonceandforall.Iamheretotacklethisproblem.Ibroughttraineddogstoremovethelast10.

(remain)invadi