Unit6

Survival;Learningobjectives;MarsisslightlymorethanhalfthesizeofEarth,withcorrespondinglowergravity.It’sadry,rockyplanet,withwhitepolar“ice”capsthatconsistmostlyoffrozencarbondioxide.TheaveragetemperatureonMarsisminus63degreesCelsius.AdayonMarsisaboutaslongasadayonEarth,plusabout39minutes.SeasonsandyearsaretwiceaslongastheyareonEarth.

Sincethe1960s,Marshasbeenthesubjectofseveralunmannedexplorationmissions.However,manysuchearlymissionsfailed.;CompletethequizandfindouthowmuchyouknowaboutMars.;Predictthemainideaaccordingtothetitleandthepictures.;1．What’sthemainideaofthepassage?

A.WhyhumanscannotliveonEarth.

B．Howtoliveinharmonywithnature.

C．ThefeasibilitystudyoflivingonMars.

D．It’simpossibletoliveonMars.;3.Choosethemagazineinwhichyouwouldmostlikelyfindthepassage.

A.TheTraveller

B.AllAboutSpace

C.EnvironmentalConcerns

D.BiologyforFun;Readforstructure;ItmaybedifficulttoimaginewhenpeoplewillliveontheplanetMars.;1.WhydowehavePlanBforEarth?;2.WhyisMarsourPlanB?;3.WhatarethechallengesofmovingtoMars?;ThinkShare;ThinkShare;Summary;Homework;Thetwopassagessharethethemeofprotectingourlivingenvironments.Thefirstpassagefocusesonbalancingnatureandurbandevelopment,andtheneedforharmonybetweenhumansandanimals.ThesecondpassagefocusesonourneedtoprotectEarthevenifweintendtosettleonotherplacessuchasMarsinfuture.;Language

points;Inthe1960sand1970s,thegreatestfearwasthatthehumanrace,andpossiblyall?advanced?lifeformsontheplanet,couldbe?wipedout?by?nuclear?missiles,justatthepushofabutton.?Today,however,environmentalproblemshavetakenoverasthegreatestrisktolifeonEarth.?Scientistsarethinkingofwaystolowerthisrisk,suchasreplacingcoalandoilwithformsofrenewableenergy.?Buttheya