Unit 3 Lesson1 The Sixth Extinction 课件-2022-2023学年高中英语北师大版2019选择性必修第一册

Unit3ConservationLesson1TheSixthExtinctionHowmuchdoyouknowaboutextinction?Choosetheoption.HowmanytimesuptotodayhaslifeonEarthalmostdiedout?A.Once.B.Fivetimes.C.Morethan10times.upto

直到，多达，胜任BiologicalExtinctioninEarthHistory

生物大灭绝白垩纪-古近纪灭绝事件恐龙大灭绝Cretaceous–Paleogeneextinctionevent奥陶纪-志留纪灭绝事件Ordovician–Silurianextinctionevent三叠纪-侏罗纪灭绝事件Triassic–Jurassicextinctionevent泥盆纪大灭绝LateDevonianextinction二叠纪－三叠纪灭绝事件Permian–Triassicextinctionevent/GreatDyingBiologicalExtinctioninEarthHistory

生物大灭绝AboutwhatpercentofallspeciesonEarthbecameextinctduringthemassextinctionknownasthe“GreatDying”?A.Lessthan10%B.Nearly50%C.Morethan90%“GreatDying”Extinctions,whereentire

speciesarewipedout,arenotunusualinourEarth'shistory.Infact,over90percentofallspeciesthateverlivedarenowextinct.Inthelast500millionyears,therehavebeenfivetimeswhenlifeonEarthhasalmostended.Theseincludethethirdmassextinction,knownasthe"GreatDying",whichkilled90%to96%ofallspecies.Andthefifthevent,whichoccurred66millionyearsago,causedthedeathofthedinosaurs.Step1句子切割：找出关系词、连词、介词、副词等Step2句子切割：找出固定搭配等成块短语Step3句子切割：找出v.v系S1V系SV系v1Vwhichis过去分词做定语，表被动v1VStep4分析句子结构

entire

adj.全部的,整个的infact=as

amatteroffact

事实上time

时间[U]；次数[C]；时代(times)include

v.包含/括be

knownas

被称为；以…而闻名occur-occurred-occurred

v.出现，发生

cause

v.导致

n.原因；事业

Para1Thereasonsforextinctionsarevaried.Accordingtoscientists,theyinclude

volcaniceruptions,asteroidshittingtheEarthfromspace,changesinsealevels,thedecreaseoftheoxygencontentoftheseaandglobalwarming.ManyscientistssaywearenowenteringtheEarth'ssixthmassextinction.Thistime,humanactivitywillbetoblame.V系V现在分词做定语VV系S1thatvaried

adj.各种各样的

vary

v.变化variety

n.种类；多样化various

adj.各种各样的volcanic

adj.火山的eruption

n.喷发，爆发space

n.空间;太空level

n.水平，层次，程度content

n.目录；内容；含量betoblame

应受责备Para1Althoughitisnotunusualforspeciestodieoutnaturally,therateatwhichthisisnowhappeningiscauseforconcern.A2015studybyscientistswhowerebasedatBrownUniversityandDukeUniversityintheUS,lookedathowquicklyspeciesdieoutduetonaturalcauses,thatis,the"backgroundextinctionrate".It+be+adj+forsb.+todosth.做某事对于某人来说是……attherate以…的速度；按…的比率rate

n.速率;比率;价格

v.评价n./v.担心，关心lookat看；研究，着眼于dueto

因为背景，后台Para2Hello.IamBaymax,yourpersonalhealthcarecompanion.Onascaleof1to10,howwouldyourateyourpain?thatis

就是说，即Theyfoundthathumanactivityiscausingspeciestodieout1,000timesfasterthannormal.Thereisalonglistofreasonswhysomanyspeciesaredyingout:airandwaterpollution,forestsbeingdestroyed,factoryfarmingandoverfishing.ItisclearthathumanactivityhasnegativelyaffectedallotherspeciesonEarth,includinganimalsandplants.normaladj.正常的,标准的清单；名单n.污染n.森林destroyv.破坏n.工厂farm

n.农场v.种田；务农overfish

v.过度捕捞Itisclearthat...很明显negatively

adv.消极地；否定地Para2pollutionn.污染pollutev.污染Para3Ifasixthmassextinctionoccurs,scientistswhohavestudiedtheissuebelievethatuptothreequartersofallspeciesonEarthcoulddieout.Ofcourse,aswehumansdependonsomanyspeciesforoursurvival,wewouldalsobeatriskofdyingout.Ourworldandourlivesdependonthebalanceinnaturebetweenanimalsandplants.

occur

v.出现，发生

V1S1VSO从V2issue

n.问题quarter

n.1/4；一刻钟as因为，由于+(原因状从)dependon

依靠/赖；取决于survival

n.生存，幸存survive

v.幸存

survivor

n.幸存者

riskn.危险,风险

v.冒险某人突然想到一个主意Anideaoccurs/occurredtosb.Anideastrikes/strucksb.Withoutforests,wewouldhavenoairtobreathe,andwithoutcleanwaterwewouldbeunabletosurvive.没有breathev.呼吸breath

n.呼吸unableadj.不能的,不会的able

adj.能的,会的beabletodosth.能够做某事Para3takeadeeepbreath

深呼吸

Afterhe

theearthquake，theoldmanbecameoneofthefew

ofthefamilyandhis

madehisoldfriendsveryhappy.survival

n.生存，幸存survive

v.幸存

survivor

n.幸存者

survivedsurvivorssurvivalPara4yet

adv.仍然,还；

conj.然而，但是notyet还没有，还没takeactiontodosth.采取行动做某事takemeasures/steps

采取措施做某事Canasixthextinctionbeavoided?Expertssaythatitisnotyettoolate,ifwetakeactionnow.avoidv.避免，回避

是时候采取行动减少不可回收塑料的使用了。Itistimetotakeactiontocutdowntheuseofunrecyclableplastic.

Itistimetotakemeasures/stepstocutdowntheuseofunrecyclableplastic.Para4Thiswouldmeanwehavetosignificantlychangethewaywelive.Forexample,weneedtotakestepstosaveendangeredspecies,includingsettingupspecialareaswhereplantsandanimalscanbeprotected.Weneedtochangehowweworkandtravelbyusingcleaner,morenaturalsourcesofenergy,suchaswindandsolarenergy.

V1haveto

不得不V1VV2significantlyadv.显著地,重大地,明显地thatVadj.(动植物)濒危的takestepstodosth.采取措施=takemeasurestodosth.protect

v.保护protection

n.

保护where=attheareas

n.

面积，区域sourcen.

来源energyn.

精力;能源solar

adj.

太阳的significantadj.

重要的，显著的Wealsoneedtoimproveourfarmingmethodstoreducewater,airandlandpollution.Inshort,ifwewanttosurvive,weneedtostopdestroyingtheplanetthatweliveonandstarttoprotectit.improve

v.改善，提高farm

n.农场

v.

种田；务农method

n.方法pollution

n.污染pollute

v.污染

inshort

简而言之V1V2destroyv.破坏；摧毁

Para4ReadingWhatisthetexttypeofthepassage?A.Narration(记叙文).B.ArgumentativeEssay(议论文).C.ExpositoryWriting(说明文).D.NewsReport(新闻报道).Para1Para2Para3Para4Readparagraph1-4andgetthemainideaofeachparagraph.