Unit4Topic2SectionC課件仁愛(ài)英語(yǔ)九年級(jí)上冊(cè)

Unit4AmazingScienceTopic2SectionC

Teachingaims1.Knowledgeaims：Wordsandphrases:Wordsandphrases:storm,weigh,journey,excitement,generally,limit,benamedaftersb.,as…as…,atadistanceof…,Ittakes…todosth.Sentences:Itsdiameteris53%aswideasthatoftheearth.

YoucantellwhichplanetisMarsbecauseitisbright,redinthenightsky.

ThegravityonthesurfaceofMarsisabouttwo-fifthsasstrongasitisonearth.

IttakesaspaceshipabouteightmonthstoreachMarsfromtheearth

IthasbeentwodayssincewelandedonMars.2.Skillaims:

Letstudentsusethefuture

passivevoiceinlistening,speakingandwriting.3.Keypoints:

Grammar:theFuturePassiveVoice4.Difficultpoints：

Itsdiameteris53%aswideasthatoftheearth.

IthasbeentwodayssincewelandedonMars.Newwordsandexpressionssolarsystem 太陽(yáng)系Roman adj.古羅馬的，古羅馬帝國(guó)的god n.上帝；神diameter n.直徑storm n.風(fēng)暴，暴（風(fēng)）雨gravity n.重力；引力weigh v.重，有……重generally adv.一般地，通常journey n.（尤指長(zhǎng)途）旅行l(wèi)imit v.限制，限定n.限度；限制excitement n.激動(dòng)；令人激動(dòng)的事WhatdoyouknowaboutMars?solarsystem[`s?ul?`sist?m]太陽(yáng)系

WhichoneisMars?MercuryVenusEarthMarsJupiterSaturn

UranusNeptuneMarsisthe_____planetfromthesuninoursolarsystem.fourthMarsisisnamedafterMars,theRomangodofwar.the

Roman

god

ofwarbenamedafter以……而命名ThesolarsystemMarsgoesaroundthesun

atadistanceofabout228millionkilometers.↑228,000,000km……相隔……FastReading1.Marslookslikearedball.()2.ThetemperatureonMarsisveryhigh.()3.Marsismuchlargerthantheearth.()4.Marsistoofarawayforustoreach.()TFFF1aLookatthepicturesandpredictwhichstatementsaretrueaboutMars.Thenreadandcheck.

MarsWhat’sthetypeofthepassage?A.Exposition(說(shuō)明文)B.Narration（記敘文）C.Argumentation（議論文）What’sthetitleofthepassage?

Scanning-Readandmatchthemainideaofeachparagraph.Para.1Para.2Para.3DescribewhatMarslookslikeAskwhatMarslookslikeSearchformoreinformationaboutMarsinthefuture.搜索

WhatdoyouknowaboutMars?Whatdoesitlooklike?MarsisthefourthplanetfromthesuninoursolarsystemandisnamedafterMars,theRomangodofwar.Itsdiameteris53%aswideasthatoftheearth.Marsgoesaroundthesunatadistanceofabout228millionkilometers.YoucantellwhichplanetisMarsbecauseitisbrightredinthenightsky.Itlookslikearedandorangeball.It'sverybeautiful.Butduringspringandsummer,thesurfaceofMarsiscoveredbystrongstorms.as...as...意為“和......一樣”，中間接形容詞或副詞的原級(jí)。否定式為notas...as...，意為“不如......那樣......”ThegravityonthesurfaceofMarsisabouttwo-fifthsasstrongasitisonearth.Soapersonwhoweighs90kilosonearthweighsonly36kilosonMars.ThetemperatureonMarsisbetween-138℃and28℃.Theairhasonly0.13%

oxygen.IttakesaspaceshipabouteightmonthstoreachMarsfromtheearthwhenthetwoplanetsareclosesttoeachother.ScientistsarestillsearchingformoreinformationaboutMars.DiameterColorShapeClimateGravityDistancefromthesun53%aswideasthatoftheearth

redandorangeaball

duringspringandsummer:strongstormstemperature:between-138℃and28℃abouttwo-fifthsasstrongasitisonearthabout228millionkilometers1bRead1aagainandwritedowntheinformationaboutMars.1.Read1acarefullyandwritedownthekeyphrasesaboutMars.2.WatchashortvideoandgetmoreinformationaboutMars.Languagepoints1.Marsisthefourthplanetfromthesuninoursolarsystem

andisnamedafterMars.火星是太陽(yáng)系中離太陽(yáng)第四遠(yuǎn)的行星，以火星命名。

name（動(dòng)詞），意為“命名，給......取名”，后接雙賓語(yǔ)，構(gòu)成：namesb./sth.+名稱(chēng)。e.g.TheynamedtheirsonBruce.

name...after以……的名字給……取名benamedafter是被動(dòng)語(yǔ)態(tài)e.g.WenamedChina’sfirstlunarprobeafterChang’e.e.g.ThebabywasnamedafterBruceLee.這個(gè)嬰兒的名字是以李小龍的名字取的。2.Itsdiameteris53%aswideasthatoftheearth.它的直徑是地球直徑的53%。

倍數(shù)的表示法：

A+be+倍數(shù)+as+adj./adv.原級(jí)+as+B

A+be+倍數(shù)+adj./adv.比較級(jí)+than+B

e.g.Thisboxisfivetimesasheavyasthatone.這個(gè)盒子是那個(gè)盒子的四倍重。Myhouseisthreetimesasbigashis.我家是他家的三倍大。e.g.Itsdiameteris53%aswideasthatoftheearth.=Itsdiameteris53%widerthanthatoftheearth.

3.Marsgoesaroundthesunatadistanceofabout228millionkilometers.火星在距太陽(yáng)約228000000千米處環(huán)繞著太陽(yáng)轉(zhuǎn)。

goaround轉(zhuǎn)動(dòng)atadistanceof相隔…distance（可數(shù)名詞），意為“距離”distant（形容詞），意為“遙遠(yuǎn)的”

atadistanceof意為“相隔”；atadistance意為“在遠(yuǎn)處”

inthedistance在遠(yuǎn)處e.g.ThatisLongIslandinthedistanceoverthere.那邊遠(yuǎn)處是長(zhǎng)島。e.g.Themoongoesaroundtheearthatadistanceof380000km.月球在距地球38萬(wàn)千米的地方繞地球旋轉(zhuǎn)。4.YoucantellwhichplanetisMarsbecauseitisbrightredinthenightsky.你可以分辨出哪顆行星是火星，因?yàn)樗谝箍罩惺敲髁恋募t色。tell在這里為“辨別，區(qū)別，認(rèn)出”，常和can,could,beableto連用。e.g.ItwassodarkthatIcouldn’ttellitwasyou.天太暗了，我沒(méi)有認(rèn)出是你。cover...with...意為“把......用......蓋住”e.g.Anncoveredherfacewithherhands.becoveredwith=becoveredby“被......覆蓋著”e.g.Thegroundiscoveredwith/bythickleaves.②cover（可數(shù)名詞），“封皮，封面”Butduringspringandsummer,thesurfaceofMarsiscoveredbystrongstorms.火星表面被強(qiáng)烈的風(fēng)暴覆蓋著。LanguagePoints6.weigh（及物動(dòng)詞），意為“重，有多重”e.g.Thelargestoneweighsover10tons.

weight（不可數(shù)名詞），意為“重量；分量”e.g.What’syourweight？=Howmuchdoyouweight？

Soapersonwhoweighs90kilosonearthweighsonly36kilosonMars.While–reading:SaytheminChinese.4.Ittakesaspaceshipabout8monthstoreachMarsfromtheearth.乘宇宙飛船從地球到火星要花8個(gè)月Ittakessb.+時(shí)間+todo…花費(fèi)某人時(shí)間做某事6.ScientistsarestillsearchingformoreinformationaboutMars.科學(xué)家們正在對(duì)火星進(jìn)行更多的探索。

searchfor尋找，搜索e.g.Allnighttheysearchedforthelostboy.整個(gè)晚上他們都在搜尋那個(gè)丟失的男孩。search…for…尋找，搜索（強(qiáng)調(diào)有具體的目標(biāo)）

e.g.ShesearchedmanyshopsforJim’sgift.

為了送給Jim禮物，她搜索了很多店。search

在……搜查；搜身。是個(gè)及物動(dòng)詞，后面直接跟

“被搜查的對(duì)象”。

e.g.Mr.Smithsearchedeveryroominthehouse.史密斯先生搜索了房子里的每個(gè)房間。LanguagePoints12.Itis(hasbeen)+一段時(shí)間+since。e.g.Itisalongtimesincetheyleft.=Ithasbeenalongtimesincetheyleft.

8.worth（形容詞），意為“值得，有......價(jià)值的”，常用短語(yǔ)有：①beworthdoingsth.意為“值得做某事”e.g.Theplaceisworthvisiting.②beworth+錢(qián)意為“值多少錢(qián)”e.g.Thepictureisworth30￥.③beworth+名詞意為“值得......”e.g.Idon’tthinkit’sworthourwork.2.Kangkang’sunclesentane-mailtohimfromMars.Choosetherightwordstocompletetheletter.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’sworsethoseWhatRead2andanswerthequestions.(1)Whoisthise-mailfromandto?ItisfromUncleStephentoKangkang.

(2)Howlongdidittakethemtogetthere?Morethantwoyears.(3)Dideverythinggowellduringthejourney?No,itdidn’t.

3a.Writebackane-mailtoUncleStephenforKangkangandaskhimformoreinformationaboutMars.Thelistmayhelpyou.clothing

foodanddrinksweather

transportation…3bWorkinpairs.Checkyourpartner’se-mailanduseyourknowledgeofMarstoanswerthequestionsforUncleStephen.DearUncle,I’mverygladtoreceiveyoure-mail,andIknowthatthelivingconditionswerequitebadduringyourjourney.IaminterestedintheinformationaboutMars.Canyoutellmemoreaboutit?HowabouttheweatheronMars?Isitverycold?Whatkindoftransportationdoyouusethere?Iamlookingforwardtoyoure-mail!Goodluck!

Yours,

KangkangRevisioninclass1.太……以致于不能……2.看起來(lái)像3.以……命名4.和……一樣……5.圍繞……轉(zhuǎn)6.相隔……遠(yuǎn)的地方7.被覆蓋……8.做某事花費(fèi)某人一段時(shí)間9.離……近10.尋找11.更糟的是12.值得(做)某事13.自從...有多久1.too...to...2.looklike3.benamedafter4.as+adj./adv.+as...5.go/move/travelaround...6.atadistanceof...7.becoveredby/with...8.Ittakessb.sometimetodosth.9.becloseto...10.searchfor11.what'sworse=evenworse12.beworth(doing)sth.13.Itis(hasbeen)+一段時(shí)間+sinceRevisioninclass1.Themoongoesaroundtheearth______adistanceofabout380,000kilometers.A.is

B.for

C.with

D.at2.It______alongtimesincewereachedBeijing.A.are

B.was

C.hasbeen

D.hadbeen3.—Don’tthrowaboutyournewspaper!—Sorry,I’mbusynow.Theywill_____later. A.collect B.becollect

C.becollected

D.collected4.It______methreehourstofinishthework.