2023學(xué)年完整公開課版九上U4T3SC

Unit4AmazingScienceSectionC

閩侯縣大義中學(xué)黃云光

2012年12月27日Topic3WhatdoyouknowaboutMars?Solarsystem

MarsisthefourthplanetfromthesuninoursolarsystemandisnamedafterMars,theRomangodofwar.NewwordssolarsystemRomandiameterstormgravitylimit太陽系古羅馬的，羅馬帝國的直徑風(fēng)暴，暴雨重力，引力，地心引力限制，限定

Acircleisdividedintotwohalvesbydiameter.circle

diameter

比一比，看誰說得快哦！Diameter:_________________________Color:____________________________Shape:___________________________Climate:___________________________________________________________Gravity:__________________________Distancefromthesun:_______________________________________________FindinformationaboutMarsfromthepassage.Itis53%

aswide

asthatoftheearth.Itisredandorange.Itlookslikeaball.Duringspringandsummer,strongstormscancoverthewholesurfaceofMars.Thetemperatureisbetween-138℃and28℃.Itisabouttwo-fifthsasstrongasitisonearth.Marsgoesaroundthesun

atadistanceofabout228millionkilometers.DifficultPoints1.Itsdiameteris53%aswideasthatoftheearth.它的直徑是地球直徑的53%。2.ThegravityonthesurfaceofMarsisabouttwo-fifthsasstrongasitisonearth.火星表面的引力大約是地球表面引力的五分之二。倍數(shù)/分?jǐn)?shù)/百分?jǐn)?shù)的同級(jí)比較:

“…倍數(shù)/分?jǐn)?shù)/百分?jǐn)?shù)+as+形容詞或副詞的原級(jí)+as…”Hisruleris_____as____asmine(two,long)twicelong這個(gè)盒子是那個(gè)盒子的三倍重Thisboxisthreetimesasheavyasthatone.來瞧一瞧哦﹗Fillintheblanksaccordingto1a.Mars,the

planetofthesolarsystem,goesaroundthesunata

ofabout228millionkilometers.Its________is53%aslongasthatoftheearth.Itlookslikea

and

ball.It’sverybeautiful.Butduring_______

and

,strong

cancoverthewhole

ofMars.Thegravityonthesurfaceofitisabout________

as_______asitisontheearth.fourthdistancediameter

redorangespringsummerstormssurfacetwo-fifthsstrong1.MarsisthefourthplanetfromthesuninoursolarsystemandisnamedafterMars,theRomangodofwar.

火星在我們太陽系中是太陽的第四顆行星，它是以羅馬的戰(zhàn)神Mars命名的。name在這里作動(dòng)詞，意為“命名，給……取名”。如：benamedafter

被命名為……，以……命名如：中國第一顆月球探測器被命名為“嫦娥一號(hào)”。

China’sfirstlunarprobewasnamedafterChang’eI.SumUp2.Marsgoesaroundthesunatadistanceofabout228millionkilometers.

火星在相隔大約228000000公里的地方繞著太陽轉(zhuǎn)。atadistanceof…

相隔……介詞短語在句中作狀語。如：Putthebikeatadistanceofabout2metersfromthedoor.

把自行車放在離房門大約2米的地方。1CPairworkDiscussthefollowingcrazyquestionswithyourpartnerandstateyourreasonsDoesMarshaveagoodclimateforplants?IsMarsausefulplacetodryfruit?IsMarsagoodplaceforhumanbeingstolive?IsMarsacomfortableplaceforheavypeople?Kangkang@Thejourneyhasgoneverywell.BernhardFashionBTHiKangkang,IthasbeentwodayssincewelandedonMars.Ittookusmorethan_____________togethere.Generally,thejourneywentwell,buttheliving______________werequitebadduringthejourney.Wehadto__________mostofthefoodinthespaceship.What’sworse,ourwatersupplieswerevery__________.Wehadtolimittheuseofwaterduringthosedays.Itissixweekssincewehadaproper__________.Sevenhundredandsixty-threedays—whatalongtime!Ioften________thefamily,buttheexcitementofbeingonMarsisworthit!GoodLuck!Yours,UncleStephen

Listentothetapeandcompleteit.twoyearsconditionsproduceshowerlowmiss（錄音）Languagepoint

IthasbeentwodayssincewelandedonMars.=ItistwodayssincewelandedonMars.我們登上火星已經(jīng)兩天了。It用作主語談?wù)摃r(shí)間，常與since連用。常用的結(jié)構(gòu)有兩種形式：（1）Ithasbeen+一段時(shí)間+since+從句。（2）Itis+一段時(shí)間+since+從句。如：我們學(xué)習(xí)英語已三年了。IthasbeenthreeyearssincewebegantolearnEnglish.=ItisthreeyearssincewebegantolearnEnglish.閱讀填詞

IstherelifeonMars?Wedon’tknow.We’resurethatpeopleontheeartharenotabletoliveonMars.PeopleneedoxygentoBreathein.ThereisalmostnooxygenonMars.LivingonMarswouldbelikelivingonaveryhighmountain.Therewouldbelittleair.Thetemperaturemightbe50degreesabovezeroatnoonand140degreesbelowzeroatnight.ManypeoplethinktheremaybeplantsonMars.WeknowthatonMarsthereiscarbon.Thisisakindofmaterialfoundinallplantsandanimalsontheearth.Throughatelescope,Marslooksred.InSomeplaces,itseemsgray.Attimesthegraycolorturnsgray-green,thenbrown,thengrayagain.Thegray-greencolormaybeakindofplantlifechangingcolorwiththeseasons.WillmengotoMarsoneday?Iftheydo,theymusttakeenoughoxygen,foodandclothingwiththem.1.Thereisalmost

no

oxygenforusto

breathe

inonMars.2.It’stoo

hot

inthedaytimebutit’stoo

cold

atnightonMars.3.Akindofmaterialcalled

carbon

foundinallplantsandanimalsonthe

earth

.4.Thegray-greencolormaybeakindofplantlifechanging

color

withthe

seasons