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Unit4AmazingScienceTopic2I’mexcitedaboutthethingsthatwillbediscoveredinthefuture.SectionCWhatareyougoingtobewhenyougrowup？Why?Doyoukno

wanythingaboutMars?solarsystemMarsisthefourthplanetfromthesuninoursolarsystemandisnamedafterMars,theRomangodofwar.MarstheRomango

dofwar被命名太阳系罗马战神n.风暴，暴(风)雨Itismuchsmallerthantheearth.Itsdiameteris53%oftheearth’s.直径Duringspringandsummer,thestro

ngstormscancoverthewholesurfaceofMars.Thegravityonitssurfaceisabout40%asstrongasitisonearth.引力，重力1aReadandunderstan

d.LookatthepicturesandpredictwhichstatementsaretrueaboutMars.Thenreadthepassagequicklyandchecktheanswers._____1.Mars

lookslikearedball._____2.ThetemperatureonMarsisveryhigh._____3.Marsismuchlargerthantheearth._____4.Marsistoof

arawayforustoreach.TFFFListento1aandanswerthequestions.(1)WhatdoesMarslooklike?•Itlookslikearedandorangeball.(2)HowfarisMarsfromth

esun?•It’sabout228millionkilometersawayfromthesun.(3)What’sthetemperatureonMars?•Itisbetween-138℃and28℃.1aReadandunderstand.动画1a1.

Itsdiameteris53%aswideasthatoftheearth.它的直径是地球直径的53%。2.ThegravityonthesurfaceofMarsisabouttwo-fifthsasstrongasit

isonearth.火星表面的引力大约是地球引力的五分之二。倍数(分数)+as+adj.+as……的几倍3.Marsgoesaroundthesunatadistanceofabout228milli

onkilometers.火星在距太阳约228000000千米处环绕着太阳转。atadistanceof…有……距离4.ScientistsarestillsearchingformoreinformationaboutMars.科学家们正在对火星进行更多的

探索。•searchfor:表示没有“被搜索的对象”只有“寻找的目标”。如：•Allnighttheysearchedforthelostboy.•search…for…表示搜查某一对象的目的是要找到什么,强调有具体的目标。如：•ShesearchedmanyshopsforJi

m’sgift.•search意为“在……搜查”或“搜身”,是个及物动词，后面直接跟“被搜查的对象”。如：•Mr.Smithsearchedeveryroominthehouse.1bRead1aagainandwritedowntheinformationaboutMars.Dia

meterColorShapeClimateGravityDistancefromthesun53%aswideasthatoftheearthredandorangeaballduringspringandsummer:strongstormstemperature:between-1

38℃and28℃abouttwo-fifthsasstrongasitisonearthabout228millionkilometersKeywords•Mars,fourth,benamedafter,diameter,aswideas,at

adistanceof,tell,because,brightred,ball,storms,gravity,temperature,oxygen,eightmonths,closestto,sear

chingforRetell1a•Mars,the_______planetofthesolarsystem,goesaroundthesunata_________ofabout228millionkilometers.Its_______is53%aswideasthatof

theearth.Itlookslikea_____and_______ball.It’sverybeautiful.Butduring______and_______,strong__________cancover

thewhole__________ofMars.Thegravityonthesurfaceofitisabout________as________asitisonearth.fourthdistanceredoranges

pringsummerstormssurfacetwo-fifthsstrongdiameter1cDiscussthecrazyquestionswithyourpartnerandstateyourreasons.1.DoesMarshaveagoodclim

ateforplants?2.IsMarsausefulplacetodryfruit?3.IsMarsagoodplaceforhumanbeingstolive?4.IsMarsacomfortableplaceforheavypeopl

e?Read2andanswerthequestions.•(1)Whoisthise-mailfromandto?•ItisfromUncleStephentoKangkang.•(2)Howlongdidittakethemtogetthere?•Morethant

woyears.•(3)Dideverythinggowellduringthejourney?•No,itdidn’t.HiKangkang,Ithasbeentwodays_________(since,from)welandedonMars.It_________(cost,took)u

smorethantwoyearsto_________(reach,get)here.Generally,thejourneywentwell,butthelivingconditionswere_______(quiet,quite)badduringthejourney.Wehad

toproducemostofthefoodinthespaceship.______________(What’smore,What’sworse),ourwatersupplieswereveryl

ow.Wehadtolimittheuseofwaterduring_________(those,these)days.Sowehadashowereverysixweeks.Wewillspendanothersevenhundredandsixty-threedaysonMars._____

_____(How,What)alongtime!Ioftenmissthefamily,buttheexcitementofbeingonMarsisworthit!Wishmeluck!Yours,UncleStephensincetookgetquiteWhat’s

worsethoseWhat2Kangkang’sunclesentane-mailtohimfromMars.Choosetherightwordstocompletetheletter.•clothing•fooda

nddrinks•weather•transportation•…3aWritebackane-mailtoUncleStephenforKangkangandaskhimformoreinformationaboutMars.Thelistmayhelpyo

u.3bWorkinpairs.Checkyourpartner’se-mailanduseyourknowledgeofMarstoanswerthequestionsforUncleStephen.DearUncle,I’mverygladtoreceiveyou

re-mail,andIknowthatthelivingconditionswerequitebadduringyourjourney.IaminterestedintheinformationaboutMars.Canyo

utellmemoreaboutit?HowabouttheweatheronMars?Isitverycold?Whatkindoftransportationdoyouusethere?Iamlook

ingforwardtoyoure-mail!Goodluck!Yours,KangkangYoucanwriteitlikethis:SummaryWelearn:1.Somewords:storm,w

eigh,journey2.Somephrases:nameafter,as…as,atadistanceof,searchfor3.Somesentences:(1)Itsdiameteris53%aswideasthatoftheearth.(2)Ithasbeentwo

dayssincewelandedonMars.Wecan:1.TalkaboutsomethingmoreaboutMars.2.Writebackane-mail.•Read1a.•Memorizetheusefulexpressi

onsandkeysentenceswhichwelearnedtoday.•FinishSectionCinyourworkbook.•ReviewSectionsA-C.