Unit4Topic2SectionC-九年級(jí)英語上冊(cè)課件

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辨別

CanwereachtheMarsnow?IstheearthfarfromMars?1964年11月，美國向火星發(fā)射“水手4號(hào)”(mariner4)飛船。1965年7月15日，美國的“水手4號(hào)”飛船接近火星，從距離火星1萬公里處拍攝了21幅照片.1971年11月，美國發(fā)射的“水手9號(hào)”(mariner9)飛船進(jìn)入火星軌道，成為火星的第一顆人造衛(wèi)星。1975年，美國向火星發(fā)射“海盜1號(hào)”、“海盜2號(hào)”宇宙飛船。1976年7月和8月，美國“海盜1號(hào)”(viking1)、“海盜2號(hào)”(viking2)飛船的著陸器分別在火星成功著陸。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

看起來像lookthesame

看起來一樣

MarsisthefourthplanetfromthesuninoursolarsystemandisnamedafaterMars,theRomangodofwar.CarefulreadingParagraph2太陽系benamedafater“以......命名”，是被動(dòng)語態(tài)羅馬戰(zhàn)神Marsismuchsmallerthantheearth.Itsdiameteris53%aswideasthatoftheearth.CarefulreadingParagraph2Marsgoesaroundthesunatadistanceofabout228millionkilometers.直徑as+adj./adv.+as和...一樣...圍繞太陽轉(zhuǎn)以......的距離YoucantellwhichplanetisMarsbecauseitisbrightred

inthenightsky.Itlookslikearedandorangeball.It’sverybeautiful.tell辨別

CarefulreadingParagraph2CarefulreadingParagraph2Butduringspringandsummer,thesurfaceofMarsiscoveredbystrongstorms.becoveredwith被......覆蓋storm

n.風(fēng)暴，暴風(fēng)雨CarefulreadingParagraph2ThegravityonthesurfaceofMarsisabouttwo-fifths

asstrongasitisonearth.gravity[?gr?v?ti]

n.重力，引力two-fifths=twofifths五分之二（分子基數(shù)詞，分母序數(shù)詞，分子大于1時(shí)，分母加s）分?jǐn)?shù)/百分?jǐn)?shù)/倍數(shù)+as...as（as...as中間的adj./adv.用原級(jí)）“......是......的幾分之幾/百分之幾/幾倍”eg.Thepopulationofthiscityistwiceaslargeasthatofthatcity.練習(xí)：1._____thestudentsinourclasshavebeentoBeijing.A.Two-thirdsB.Second-thirdC.Two-threeD.Two-threes2.Ourclassroomistwiceas_____astheirs.A.largerB.largestC.morelargeD.largeADCarefulreadingParagraph2Soaperson(whoweighs90kilosonearth)

weighsonly36kilosonMars.定語從句weigh[we?]v.重，有……重CarefulreadingParagraph2ThetemperatureonMarsisbetween-138℃and28℃.Theairhasonly0.13%oxygen.minus/negativeonehundredandthirty-eightdegreeCelsius[?selsi?s].

Ican’tbreathe.CarefulreadingParagraph2Ittakesaspaceshipabouteightmonthsto

reachMarsfromtheearthwhenthetwoplanetsareclosesttoeachother.ScientistsarestillsearchingformoreinformationaboutMars.Ittakessb.sometimetodosth.“花某人多少時(shí)間做某事”eg.Ittakesmeanhourtofinishmyhomeworkeveryday.練習(xí)：Ittakesaspaceshipabouteightmonths_________(reach)Marsfromtheearth.toreachbeclose/nextto離......近鏈接：befarfrom離......遠(yuǎn)searchfor尋找“到達(dá)”：reach+地點(diǎn)=getto+地點(diǎn)=arrivein+大地點(diǎn)/arriveat+小地點(diǎn)

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.

自從我們?cè)诨鹦巧现懸呀?jīng)有兩天了。

考點(diǎn)：Itis+時(shí)間段+since+過去時(shí)從句=Ithasbeen+時(shí)間段+since+過去時(shí)從句=have/has+延續(xù)性動(dòng)詞或狀態(tài)短語+since+過去時(shí)/for+一段時(shí)間eg.

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

及時(shí)練習(xí)：寫出下面句子的同義句。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