高中英语 module 5 a lesson in a lab section ⅰ introduction & reading-pre-reading教学案 外研版必修1

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1、Module5ALessoninaLabSectionⅠIntroduction&Reading-Pre-readingTherearetwokindsofchange—chemicalchangeandphysicalchange.Inachemicalchange,thereisalwaysanewsubstanceformed.Breakingupwaterintohydrogen(氢气)andoxygenisachemicalchange.Ineachofthechemicalchangeatleastonenewsubstance(物质)isfor

2、med.Achangeisnotachemicalchangeifitdoesn’tformanewsubstance.Physicalchangesareverycommon,too.Therearemanyexamples.Youcanmakeaphysicalchangebytearing(撕扯)apieceofpaperintotwo,orbycuttingapieceofironwithalathe(车床).Herethepaperisstillpaper,andtheironisstilliron.Anotherwayofmakingphysicalch

3、angeisdissolving(溶解)somethinginwater.Whenyoudissolvesaltinwater,thesaltdisappears.Youmaythinkthatanewsubstancehasbeenformed.Butinfactthereisnonewsubstance.Thesaltisstillsalt.Youcanstilltasteit.Sothedissolvingofanythingisaphysicalchange.Whenwaterfreezes,thechangeisalsoaphysicalone.Thewa

4、terchangesfromliquidtosolid.Butitisstillthesamesubstance.Thatiswhythefreezingof非常感谢上级领导对我的信任，这次安排我向股份公司述职，既是对我履行职责的监督，也是对我个人的关心和爱护，更是对**百联东方商厦有限公司工作的高度重视和支持。anythingisaphysicalchange.Andpeopleoftentellthedifferencesbetweenachemicalchangeandaphysicalchangethroughsomeexperiments.Inthismo

5、dule,let’sexplorethemagicalscienceworldbydoingexperimentsbyourselves.Section_ⅠIntroduction&Reading—Prereading,PassageAIt’shardtothinkofaworldwithoutmetals①.Differentmetalshavedifferentuses②，forexample,steelisusedincars,andironisusedinelectrical③equipment④.Whenweusemetals,itisimportantt

6、oknowhowtheyreactwithdifferentsubstances⑤，forexample,waterandoxygen⑥.Thereaction⑦ofmetalswiththesesubstancescanbeputinorder⑧.Hereisatablewiththemetals⑨thatreactmostatthetop，andthemetalsthatreactleastatthebottom⑪.MetalHeatedinoxygenReactionwithwaterorsteam⑮PotassiumBurnstoform⑫anoxide⑬R

7、eactingwithcoldwaterSodiumCalciumMagnesiumReactingwithsteam　AluminiumZincIronReactsslowlyPartialreactionCopperPartial⑭reactionNoreaction*anoxide＝anothersubstance＋oxygen①thinkof想出；想象句中it是形式主语，真正的主语是tothinkof...②usen．用途；功能，此处为可数名词。③electrical/I’lektrIkl/adj.与电有关的；用电的④equipment/I’kwIpmə