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Unit4AmazingScienceTopic2I’mexcitedaboutthethingsthatwillbediscoveredinthefuture.SectionCWhatareyougoingtobewhenyougrowup？Why?D

oyouknowanythingaboutMars?solarsystemMarsisthefourthplanetfromthesuninoursolarsystemandisnamedafterMars,theRomangodofwar.

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

mer,thestrongstormscancoverthewholesurfaceofMars.Thegravityonitssurfaceisabout40%asstrongasitisonearth.引力，重力1aReadandun

derstand.LookatthepicturesandpredictwhichstatementsaretrueaboutMars.Thenreadthepassagequicklyandchecktheanswers.____

_1.Marslookslikearedball._____2.ThetemperatureonMarsisveryhigh._____3.Marsismuchlargerthantheearth._____4.Marsistoofarawayforustoreach.TFFFListen

to1aandanswerthequestions.(1)WhatdoesMarslooklike?•Itlookslikearedandorangeball.(2)HowfarisMarsfromthesun?•It’sabout228millionkil

ometersawayfromthesun.(3)What’sthetemperatureonMars?•Itisbetween-138℃and28℃.1aReadandunderstand.动画1a1.Itsdiam

eteris53%aswideasthatoftheearth.它的直径是地球直径的53%。2.ThegravityonthesurfaceofMarsisabouttwo-fifthsasstrongasitisonearth.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.Marsgoesaroundthesunatadistanceofabout228millionkilometers.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：•ShesearchedmanyshopsforJim’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.1bRead1aagainandwritedowntheinfor

mationaboutMars.DiameterColorShapeClimateGravityDistancefromthesun53%aswideasthatoftheearthredandorangeaballduringspringandsummer:stron

gstormstemperature:between-138℃and28℃abouttwo-fifthsasstrongasitisonearthabout228millionkilometersKeywords•Mars

,fourth,benamedafter,diameter,aswideas,atadistanceof,tell,because,brightred,ball,storms,gravity,temperature,oxygen,eightmonths,closestto,sea

rchingforRetell1a•Mars,the_______planetofthesolarsystem,goesaroundthesunata_________ofabout228millionkilometers.Its_______is53%aswideasthatoftheea

rth.Itlookslikea_____and_______ball.It’sverybeautiful.Butduring______and_______,strong__________cancoverthewhole_

_________ofMars.Thegravityonthesurfaceofitisabout________as________asitisonearth.fourthdistanceredorangespr

ingsummerstormssurfacetwo-fifthsstrongdiameter1cDiscussthecrazyquestionswithyourpartnerandstateyourreasons.1.DoesMarshaveagoodclimateforplant

s?2.IsMarsausefulplacetodryfruit?3.IsMarsagoodplaceforhumanbeingstolive?4.IsMarsacomfortableplaceforheavyp

eople?Read2andanswerthequestions.•(1)Whoisthise-mailfromandto?•ItisfromUncleStephentoKangkang.•(2)Howlongdidittakethemtogetth

ere?•Morethantwoyears.•(3)Dideverythinggowellduringthejourney?•No,itdidn’t.HiKangkang,Ithasbeentwodays_________(since,from)we

landedonMars.It_________(cost,took)usmorethantwoyearsto_________(reach,get)here.Generally,thejourneywentwell,butthelivingcondit

ionswere_______(quiet,quite)badduringthejourney.Wehadtoproducemostofthefoodinthespaceship.______________(Wha

t’smore,What’sworse),ourwatersupplieswereverylow.Wehadtolimittheuseofwaterduring_________(those,these)days.Sowehadashowereverysixweeks.Wewillspenda

nothersevenhundredandsixty-threedaysonMars.__________(How,What)alongtime!Ioftenmissthefamily,buttheexcitementofbeingonMarsisworthit!Wishmel

uck!Yours,UncleStephensincetookgetquiteWhat’sworsethoseWhat2Kangkang’sunclesentane-mailtohimfromMars.Choo

setherightwordstocompletetheletter.•clothing•foodanddrinks•weather•transportation•…3aWritebackane-mailtoUncleSt

ephenforKangkangandaskhimformoreinformationaboutMars.Thelistmayhelpyou.3bWorkinpairs.Checkyourpartner’se-mailanduseyourknowledgeofMarsto

answerthequestionsforUncleStephen.DearUncle,I’mverygladtoreceiveyoure-mail,andIknowthatthelivingconditionswere

quitebadduringyourjourney.IaminterestedintheinformationaboutMars.Canyoutellmemoreaboutit?Howabouttheweather

onMars?Isitverycold?Whatkindoftransportationdoyouusethere?Iamlookingforwardtoyoure-mail!Goodluck!Yours,KangkangY

oucanwriteitlikethis:SummaryWelearn:1.Somewords:storm,weigh,journey2.Somephrases:nameafter,as…as,atadistanceof,s

earchfor3.Somesentences:(1)Itsdiameteris53%aswideasthatoftheearth.(2)IthasbeentwodayssincewelandedonMars.Wecan:1.Talkaboutsometh

ingmoreaboutMars.2.Writebackane-mail.•Read1a.•Memorizetheusefulexpressionsandkeysentenceswhichwelearnedtoday.•

FinishSectionCinyourworkbook.•ReviewSectionsA-C.