Unit4Topic2SectionC-九年级英语上册课件

Unit4AmazingScienceSectionCTopic2I’mexcitedaboutthethingsthatwillbediscoveredinthefuture.(

)1.—Haveyouever_____toTibet?—Yes,Ihave.Andthescenerytheremademevery_____.A.been;excitingB.gone;excitedC.been;excitedD.gone;exciting(

)2.—Look,whatanicegarden!—Yes.It_____everyday.A.hasbeencleanedB.iscleanedC.isbeingcleanedD.wascleaned(

)3.Abridgewill_____acrosstherivernextyear.A.bebuiltB.builtC.isbuiltD.build(

)4.Tomakeourcitymorebeautiful,rubbish_____intotheriver.A.needn’tbethrownB.mustn’tbethrownC.can’tthrowD.maynotthrowCReviewBABPre-readingNewwordsWhatdoyouknowaboutMars?Whatdoesitlooklike?Aball.Whatcolorisit?Redandorange.Marsisthefourthplanetfromthesuninoursolarsystem.ItisnamedafterMars,theRomangodofwar.benamedafter以......命名

YoucantellwhichplanetisMarsbecauseitisbrightredinthenightsky.tell辨别

CanwereachtheMarsnow?IstheearthfarfromMars?1964年11月，美国向火星发射“水手4号”(mariner4)飞船。1965年7月15日，美国的“水手4号”飞船接近火星，从距离火星1万公里处拍摄了21幅照片.1971年11月，美国发射的“水手9号”(mariner9)飞船进入火星轨道，成为火星的第一颗人造卫星。1975年，美国向火星发射“海盗1号”、“海盗2号”宇宙飞船。1976年7月和8月，美国“海盗1号”(viking1)、“海盗2号”(viking2)飞船的着陆器分别在火星成功着陆。While-reading1a_____1.Marslookslikearedball._____2.ThetemperatureonMarsisveryhigh._____3.Marsismuchlargerthantheearth._____4.Marsistoofarawayforustoreach.Readandunderstand.

LookatthepicturesandpredictwhichstatementsaretrueaboutMars.Thenreadthepassagequicklyandchecktheanswers.TFFFRead1aandfindoutthenumberinthetext.53%aswideas228millionkilometersabouttwo-fifthsasstrongas90kilos/36kilos－138℃——28℃0.13%betweenminusonehundredandthirty-eightdegreecentigradeandtwenty-eightdegreecentigradezeropointonethreepercenttwentydiameterdiameterdiameterdistancegravityweightemperatureoxygenFastreadingRead1aagainandwritedowntheinformationaboutMars.DiameterColorShapeClimateGravityDistancefromthesun53%aswideasthatoftheearth

redandorangeaball

duringspringandsummer:strongstormstemperature:between-138℃and28℃abouttwo-fifthsasstrongasitisonearthabout228millionkilometers1bWatchandfollowCarefulreadingParagraph1WhatdoyouknowaboutMars?Whatdoesitlooklike?knowabout

了解

looklike

看起来像lookthesame

看起来一样

MarsisthefourthplanetfromthesuninoursolarsystemandisnamedafaterMars,theRomangodofwar.CarefulreadingParagraph2太阳系benamedafater“以......命名”，是被动语态罗马战神Marsismuchsmallerthantheearth.Itsdiameteris53%aswideasthatoftheearth.CarefulreadingParagraph2Marsgoesaroundthesunatadistanceofabout228millionkilometers.直径as+adj./adv.+as和...一样...围绕太阳转以......的距离YoucantellwhichplanetisMarsbecauseitisbrightred

inthenightsky.Itlookslikearedandorangeball.It’sverybeautiful.tell辨别

CarefulreadingParagraph2CarefulreadingParagraph2Butduringspringandsummer,thesurfaceofMarsiscoveredbystrongstorms.becoveredwith被......覆盖storm

n.风暴，暴风雨CarefulreadingParagraph2ThegravityonthesurfaceofMarsisabouttwo-fifths

asstrongasitisonearth.gravity[ˈgrævəti]

n.重力，引力two-fifths=twofifths五分之二（分子基数词，分母序数词，分子大于1时，分母加s）分数/百分数/倍数+as...as（as...as中间的adj./adv.用原级）“......是......的几分之几/百分之几/几倍”eg.Thepopulationofthiscityistwiceaslargeasthatofthatcity.练习：1._____thestudentsinourclasshavebeentoBeijing.A.Two-thirdsB.Second-thirdC.Two-threeD.Two-threes2.Ourclassroomistwiceas_____astheirs.A.largerB.largestC.morelargeD.largeADCarefulreadingParagraph2Soaperson(whoweighs90kilosonearth)

weighsonly36kilosonMars.定语从句weigh[weɪ]v.重，有……重CarefulreadingParagraph2ThetemperatureonMarsisbetween-138℃and28℃.Theairhasonly0.13%oxygen.minus/negativeonehundredandthirty-eightdegreeCelsius[ˈselsiəs].

Ican’tbreathe.CarefulreadingParagraph2Ittakesaspaceshipabouteightmonthsto

reachMarsfromtheearthwhenthetwoplanetsareclosesttoeachother.ScientistsarestillsearchingformoreinformationaboutMars.Ittakessb.sometimetodosth.“花某人多少时间做某事”eg.Ittakesmeanhourtofinishmyhomeworkeveryday.练习：Ittakesaspaceshipabouteightmonths_________(reach)Marsfromtheearth.toreachbeclose/nextto离......近链接：befarfrom离......远searchfor寻找“到达”：reach+地点=getto+地点=arrivein+大地点/arriveat+小地点

Post-readingDiscussthecrazyquestionswithyourpartnerandstateyourreasons.1cRead2andanswerthequestions.(1)Whoisthise-mailfromandto?(2)Howlongdidittakethemtogetthere?(3)Dideverythinggowellduringthejourney?ItisfromUncleStephentoKangkang.

Morethantwoyears.No,itdidn’t.

HiKangkang,Ithasbeentwodays_________(since,from)welandedonMars.It_________(cost,took)usmorethantwoyearsto_________(reach,get)here.Generally,thejourneywentwell,butthelivingconditionswere_______(quiet,quite)badduringthejourney.Wehadtoproducemostofthefoodinthespaceship.______________(What’smore,What’sworse),ourwatersupplieswereverylow.Wehadtolimittheuseofwaterduring_________(those,these)days.Sowehadashowereverysixweeks.Wewillspendanothersevenhundredandsixty-threedaysonMars.__________(How,What)alongtime!Ioftenmissthefamily,buttheexcitementofbeingonMarsisworthit!Wishmeluck!Yours,UncleStephensincetookgetquiteWhat’sworsethoseWhat2beworthdoingsth.值得做某事clothingfoodanddrinksweathertransportation…Writebackane-mailtoUncleStephenforKangkangandaskhimformoreinformationaboutMars.Thelistmayhelpyou.3aWorkinpairs.Checkyourpartner’se-mailanduseyourknowledgeofMarstoanswerthequestionsforUncleStephen.3bDearUncle,I’mverygladtoreceiveyoure-mail,andIknowthatthelivingconditionswerequitebadduringyourjourney.IaminterestedintheinformationaboutMars.Canyoutellmemoreaboutit?HowabouttheweatheronMars?Isitverycold?Whatkindoftransportationdoyouusethere?Iamlookingforwardtoyoure-mail!Goodluck!

Yours,

KangkangYoucanwriteitlikethis:1.IthasbeentwodayssincewelandedonMars.

自从我们在火星上着陆已经有两天了。

考点：Itis+时间段+since+过去时从句=Ithasbeen+时间段+since+过去时从句=have/has+延续性动词或状态短语+since+过去时/for+一段时间eg.

IthasbeentwodayssincewelandedonMars.=ItistwodayssincewelandedonMars.=WehavebeenonMarssincetwodaysago.=WehavebeenonMarsfortwodays.Languagepoints

及时练习：写出下面句子的同义句。1.Itis5dayssinceIborrowedthebookfromthelibrary.=It__________5days_____Iborrowedthebookfromthelibrary.=I__________thebookfromthelibrary_____5daysago.=I__________thebookfromthelibrary_____5days.2.Thebabyfellasleep10minutesago.=__________10minutes_____thebabyfellasleep.=It__________10minutessincethebabyfellasleep.=Thebaby_______________for10minutes.=Thebabyhas_______________10minutesago.LanguagepointshasbeensincehavekeptsincehavekeptforItissincehasbeenhasbeenasleepbeenasleepsince()1.Canyou_____thedifferencesbetweenthetwowords?

A.tellB.speakC.talkD.judge()2.Theexamwassodifficultthatonly_____ofthestudentsinourclasspassedit.

A.two-fifthsB.two-threeC.second-fifthsD.fifths-second()3.Scientistsaredoingexperimentsinorder_____theMarssoon.

A.toexploreB.exploreC.toexploringD.thatexplore

()4.Ittakesusalongtime_____abikethere.

A.rid