Unit3ConservationLesson1TheSixthExtinction課件-高中英語(yǔ)北師大版選擇性

Unit3ConservationLesson1TheSixthExtinctionActivateandshare1Whatcanyouseefromthispicture?2Whatcausedthoseanimalsandplantstobeextinct?Activateandshare3Whatdoestheword“extinction”mean?“Extinction”meansasituationinwhichsomethingnolongerexists.Itmaytalkaboutwhy“TheSixthExtinction”isgoingtohappenandhowwecanhandlethesituation.4Canyoupredictwhatthetextisaboutaccordingtothetitle“TheSixthExtinction”?ReadandexploreReadthetextandanswerthequestions.1HowmanytimesuptotodayhaslifeonEarthalmostdiedout?2AboutwhatpercentofallspeciesonEarthbecameextinctduringthemassextinctionknownasthe“GreatDying”?

3Whatdoscientiststhinkwillcausethenextmassextinction?Fivetimes.Morethan90%.Humanactivity.ReadandexploreReadandexploreentirespeciesarewipedoutfivetimesthethird:killed90%to96%ofallspecies;thefifth:whichoccurred66millionyearsago,causedthedeathofthedinosaursvolcanoeruptions,asteroidshittingtheEarthfromspace,changesinsealevels,thedecreaseofoxygencontentofthesea,globalwarmingchangethewaywelive,includingsettingupspecialareaswhereplantsandanimalscanbeprotected…entirespeciesarewipedoutfivetimesthethird:killed90%to96%ofallspecies;thefifth:causedthedeathofthedinosaursvolcanoeruptions,asteroids,sealevels,oxygen,globalwarmingchangethewaywelive;changehowweworkandtravel;improveourfamingmethodsBasedonthediagram,talkaboutthedifferentaspectsofextinctions.ReadandexploreReadandexploreReadagainandanswerthequestions.Thestudyfoundthathowquicklyspeciesdieoutduetonaturalcauses,thatis,the“backgroundextinctionrate”.Theyfoundthathumanactivityiscausingspeciestodieout1,000timesfasterthannormal.BecausehumanactivityhasnegativelyaffectedallotherspeciesonEarth,includinganimalsandplants.Becauseourworldandourlivesdependonthebalanceinnaturebetweenanimalsandplants.Readandexplore4Whatdidpeopledointhecasestudyto

protectblackrobins?Whichclaim(s)didthe

casestudysupportinthetext?PeopleprotectedOldBlue’seggs,helpedthemtohatch,andtookcareofthechicks.Peoplearerestoringtheirhabitatsandremovingsmallanimalslikemiceandcatsfromtheislandswheretheylive.Thecasestudyshowedthatevenindesperatesituations,wecandosomethingtohelp.Inshort,it’snevertoolate.Thinkandshare?facts ?opinions/predictions

?reasons ?solutionsThinkandshareFacts:Line2-6Reasons:Line6-9Opinions/Predictions:Line9-10FactsThinkandshareFactsReasons(1)TypicallanguageFacts:Reasons:Opinions/predictions:

Solutions:data,number,statisticsthereasonsbecause…Sbsays/predicts/believes,inone’sopinion,fromsb’spointofviewWeneedtodo;onlybydoingthiscanwesolvetheproblem…Opinion/PredictionReasonsOpinion/PredictionSolutionsThinkandshare(2)Whattexttypeisthispieceofwriting?Exposition.Causeandeffect&problemandsolutiontoexplainwhatthesixthextinctionisanditseffectsandcallonpeopletotakeactiontopreventitfromhappeningThinkandshare2.Whatwritingmethodsdoesthewriterusetoconvincereaders?Areyouconvinced?Whyorwhynot?citingideasfromexpertsorauthoritiesgivingexamplesusingdataIbelievethatifwetakeactionnowitisnottoolatetosaveotherspeciesfromextinction.Theblackrobinwassavedfromextinctionwhenonlyfivebirdsremained,soIthinkitispossibletosaveanyspeciesifweactrightnow.NotesWe’llwipeoutanyenemythatdarestoinvadeourterritory.敵人膽敢來(lái)犯，我們就把它消滅。1wipeout消滅；徹底摧毀Didyouwipeoutthedebts?你還清債務(wù)了嗎？Theheathadwipedusout.炎熱使我們筋疲力盡。wipesbout:

tomakesbextremelytiredNotes2betoblame應(yīng)該負(fù)責(zé)；應(yīng)受責(zé)備Someresearchershavespeculatedthathigh-heeledshoesmaybetoblame.有研究者推測(cè)高跟鞋可能是罪魁禍?zhǔn)?。Expertssaythatmisconceptionsofwealthmightbetoblameforthetrend.專家指出錯(cuò)誤的財(cái)富觀可能是導(dǎo)致這一現(xiàn)象的罪魁禍?zhǔn)住otes3dieout滅絕；消失；逐漸消失Butarewepreparedtoseepeopledieandtheirculturesdieout?但是我們準(zhǔn)備好了看那些人死去，看他們的文化消亡嗎？Inthismanner,theweakandunfitspeciesdieouttobereplacedbyastronger,healthier,moreimpressivespecies.在這種形式下，弱小和不適宜的物種就會(huì)滅絕，取而代之的是一個(gè)更強(qiáng)大、更健康、更進(jìn)步的物種。No