高二【英语(外研)】选择性必修二-Unit-6-Survival-3-课件

选择性必修二

Unit6Survival(3)

高二年级英语选择性必修二1DevelopingideasPlanB:LifeonMars?ReadingDevelopingideas2ObjectivesAttheendoftheclass,youwillbeableto:1.findoutthereasonsforhumanstoliveonMars2.makecorrectinferencesandgettheevidences3.retellthepassagesimply4.shareopinionsaboutMarsafterlearningthepassageObjectivesAttheendofthec3Lead-inTalkaboutsomethingaboutMars.MarsisslightlymorethanhalfthesizeofEarth,withcorrespondinglowergravity.Theatmospherethereisreallythin,100timesthinnerthanonEarthandit’snotbreathable.It’s96percentcarbondioxide.It’sreallycoldthereandthereisquitearangeoftemperature.AdayonMarsisaboutaslongasadayonEarth,plusabout39minutes.Lead-inTalkaboutsomethinga4Lead-inTalkaboutsomethingaboutMars.SeasonsandyearsaretwiceaslongastheyareonEarth.Sincethe1960s,Marshasbeenthesubjectofseveralunmannedexplorationmissions.However,manyofearlymissionsfailed.Marsisalongwayaway,1000timesfartherawayfromusthanthemoon.Lead-inTalkaboutsomethinga5Lead-inCompletethequizaboutMars.1)Marsisthe____smallestplanetinsolarsystem.a.secondb.thirdc.fourth2)ThesurfaceofMarsiscoveredin_____.

a.rocksb.waterc.grass

Lead-inCompletethequizabou6Lead-in3)TheaveragerecordedtemperatureonMarsis___.a.40℃b.2℃c.-63℃4)OnedayonMarsisabout___long.a.18hoursb.24hoursc.37hours

Lead-in3)Theaveragerecorde7PredictingPredictthemainideaaccordingtothetitleandthepictures.PredictingPredictthemainide8ReadingforgeneralideaReadthepassagetoanswerthequestions.1.WhydopeoplemakePlanB?2.WhatisPlanB?3.IsiteasyforustoliveonMars?4.Whatshouldwedonow?ReadingforgeneralideaReadt9Checkingtheanswers1.WhydopeoplemakePlanB?2.WhatisPlanB?

EnvironmentalproblemshavetakenoverasthegreatestrisktolifeonEarth(paragraph1).Oneoptionistoexploreotherplanetstoseeifwecouldliveonthem.ThemostlikelychoiceisMars(paragraph2).Checkingtheanswers1.Whydo10Checkingtheanswers3.IsiteasyforustoliveonMars?ItisnoteasybecauseitwouldtakemonthstoreachMars,travellingthroughdangeroussolarradiation.EvenifthefirstsettlersdoreachMarssafely,theymaynotbeabletoreturntoEarth.Stayingalivewillbeadailychallenge(paragraph4).Checkingtheanswers3.Isite11Checkingtheanswers4.Whatshouldwedonow?

Weneedtotakemuchbettercareofourownplanetuntilwearefinallyabletoliveonanotherplanet(paragraph5).Checkingtheanswers4.Whatsh12SummaryFromthepredictionandtheinformationabove,weknowthatPlanBistoexploreMarstoseeifwemightliveonitoneday.SummaryFromthepredictionand13ReadingforspecificinformationReadtofindoutthedetailedinformationaboutthereasonswhypeoplemightliveonMars.Readingforspecificinformati14Readingforspecificinformation1.MarsisrelativelyclosetoEarth.2.Marshasanenvironmentlesshostilethanthatofotherplanets.

Thepossibleanswers:Readingforspecificinformati15Readingforspecificinformation3.OurinterestinMartianexplorationisgreaterthanbefore.4.Since1960s,wehavebeensendingunmannedspacecrafttoMars.Ourprobeshaveorbitedtheplanet,sendingbackvaluabledataandstunningimages.OurrobotshaveexploredtheMartiansurface,testingthesoilandsearchingforresources,waterandsignsoflife.Readingforspecificinformati16Readingforspecificinformation5.Encouragedbydiscoveriesovertheyears,spaceagenciesofvariouscountriesareplanningmannedmissionstoMarsthatcouldtakeplacewithinthenext25years.6.Morerecently,scientistshavesucceededingrowingavarietyofplantsinanenvironmentsimilartothatonMars.Readingforspecificinformati17SummaryTheevidencesthatthenatural

geographicalconditionsofMarsandourinterest,effortsandgainaboutMarsarecleartousthatonedayhumansmightliveonMars,whichwouldbethemostinspiring.SummaryTheevidencesthatthe18ReadingforspecificinformationChoosethemagazineinwhichyouwouldmostlikelyfindthepassageandgiveyourreasons.

1.TheTraveller2.AllAboutSpace3.EnvironmentalConcerns4.BiologyforFunReadingforspecificinformati19Readingforspecificinformation1.TheTraveller:focusesonthepersonwhotravels,whathesees,whathedoesorhowhefeels.Thecharacteristicofeachmagazine:2.AllAboutSpace:

focusesonthesecretoftheouterspace,showingvariousfascinatingnaturalphenomena.

Readingforspecificinformati20ReadingforspecificinformationThecharacteristicofeachmagazine:3.EnvironmentalConcerns:focusesonvariousenvironmentalproblems,whichusuallydrawspeople’sgreatconcern.4.BiologyforFun:focusesonstudiesaboutlifeandlivingorganismsforfun,includingtheirphysicalstructureandchemicalprocesses.Readingforspecificinformati21ReadingforspecificinformationByreadingthepassage,weknowthattodayenvironmentalproblemshavetakenoverasthegreatestrisktolifeonEarth(paragraph1).ScientificresearchshowsthattheplanetEarthisgettingwarmer(paragraph5).Allthecluestellusthepassageismostlikelytobefoundinthemagazine—

EnvironmentalConcerns.

Readingforspecificinformati22ReadingforspecificinformationChoosethemagazineinwhichyouwouldmostlikelyfindthepassageandgiveyourreasons.

1.TheTraveller2.AllAboutSpace3.EnvironmentalConcerns4.BiologyforFunReadingforspecificinformati23Choosethestatementsthatcanbeinferredfromthepassage.

Readingforspecificinformation1.HumanshaveyetnotvisitedMars.2.PeoplewanttogotoMarsonholiday.3.ThereareplantsgrowingonMars.Choosethestatementsthatcan24Readingforspecificinformation4.ThegreatestrisktolifeonEarthusedtobenuclearmissiles.5.Oneday,humanswillhavetogoandliveonanotherplanet.6.OurPlanAincludesdevelopingrenewableenergyresources.7.TheBiosphere2experimentendedinfailure.Readingforspecificinformati25ReadingforspecificinformationWhatistheinferredinformation?

Inferredinformationreferstotheopinionsorconclusionsthatarenotdirectlystatedwithinthegiveninformation.Instead,thecontext,theheadingsandpicturesoftenhelpusmakeeducatedguessesaboutatext.Readingforspecificinformati26ReadingforspecificinformationClues:SpaceagenciesofvariouscountriesareplanningmannedmissionstoMarsthatcouldtakeplacewithinthenext25years(paragraph2).Sonumber1“HumanshaveyetnotvisitedMars”canbeinferred.Readingforspecificinformati27ReadingforspecificinformationInthe1960sand1970s,thegreatestfearwasthatthehumanrace,andpossiblyalladvancedlifeformsontheplanet,couldbewipedoutbynuclearmissiles,justatthepushofabutton(paragraph1).Sonumber4“ThegreatestrisktolifeonEarthusedtobenuclearmissiles”canbeinferred.Readingforspecificinformati28ReadingforspecificinformationScientistsarethinkingofwaystolowerthisrisk,suchasreplacingcoalandoilwithformsofrenewableenergy(paragraph1).Sonumber6“OurPlanAincludesdevelopingrenewableenergyresources”canbeinferred.Readingforspecificinformati29ReadingforspecificinformationAsearlyasthe1980s,scientistswerebuildingBiosphere2intheArizonadesert.Althoughthetwo-yearexperimentwasnotasuccess(paragraph4).

Sonumber7“TheBiosphere2experimentendedinfailure”canbeinferred.Readingforspecificinformati30RetellthetextaccordingtothecluesofwhyhumansmightliveonMars.Youcanaddmoreinformationfromthepassageifnecessary.RetellingRetellthetextaccordingtot31Thinkaboutthefollowingquestionsandshareyouropinions.1)Whichisbetter,toliveonMarsortosolveEarth’sproblems?2)WouldyouliketobeoneofthefirstpeopletoliveonMars?Whyorwhynot?ThinkingandSharingThinkaboutthefollowingques32Inmyopinion,tosolveEarth’sproblemsisbetter.Ontheonehand,rightnow,it’stheonlyonewehave.Ontheotherhand,theEarth’schangeisbeingcausedbyhumanactivityandishavingaterribleeffectonthebiosphere,soit’sourdutytoprotectitandsolvetheproblems.ThinkingandSharing1)Whichisbetter,toliveonMarsortosolveEarth’sproblems?Inmyopinion,tosolveEarth’33Iwouldliketobeoneofthefirstpeopletoliveon