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1、Module5Alessoninalab平陆二中姚寅1/21/41/33/4onehalfonequarteronethirdthreequarters1/51/74/72/3onefifthoneseventhfourseventhstwothirdsRevision:let'sreviewfractions②倍数+形容词比较级+than…③倍数+the(size,height,length,weight,width,depth,age)+of…①倍数（half,once,twice,…times）
2、+as+形容词+as(big,high,long,weighwide,deep,old)Canyourememberthem?PleasematchAwithB.AMagnesiumIronCalciumAluminiumCopperZincSodiumPotassiumBAlZnNaKFeCaMgCuWhatcanyousee?Icanseealabinthepicture.ReadingDoyouknowhowwecancarryoutanexperimentsuccessfully?It’sin
3、terestingtodoanexperiment.Butwe’vegotalotofthingstodobeforeanexperiment.First,weshouldbecleartheaimoftheexperiment,theapparatusweneedandhowwecancarryitout(wecallit“method”).Wewatchwhat’shappeningandgettheresult.Lastlyitisimportanttohaveadiscussiononther
4、esultoftheexperiment.Don’tforgettowritedowntheconclusion.Whatisthecorrectordertodescribeascientificexperiment?aimmethodresultconclusionPassageAReadthroughpassageAinthreeminutes.electricaladj.用电的，与电有关的electricityn.电equipmentn.设备，装备reactvi.（化学）反应reactionn
5、.反应oxiden.氧化物Steamn.蒸汽，水气PassageA–3.FastReading(2m)ReadPassageAandchoosethebesttitleforit.TheDifferentUsesofMetalsTheReactionofMetalsTheReactionofMetalswithOxygenWhichofthemetalsinthetablereactsthemostwithoxygenandwater?Whathappenswhenyouheatcalciuminox
6、ygen?Potassium,calciumandsodiumItburnstoformanoxide.3.Whichmetalsreactwithsteam?4.Doesironhaveasloworfastreactionwithsteam?5.Doescopperreactwithwater?Magnesium,aluminiumandzincIthasaslowreaction.No,itdoesn’t.6.Whatshouldweknowwhenweusemetals?Itisimporta
7、nttoknowhowtheyreactwithdifferentsubstances.PassageBQ:Canweputnailsinwetair?CompletethesentencesaccordingtopassageBInthefirstpartoftheexperiment,the____isdry.Itshowsthatiron___________indryair.Inthesecondpart,youmust_____thewaterto_____________thatthere
8、isnoairinit.________someoiltothewatercan______theairoutofit.Itshowsthat_____don’trustin____________water.Inthethirdpart,_______thetubewithwater.Itshowsthattheyrustin_________water.airdoesn’trustboilmakesureAddingkeepnailsair-free
