2012高中英语 5 英汉对照同步导学课件 外研版必修1 新课标 （山东专版）.ppt

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1、PassageAItishardtothinkofaworldwithoutmetals.Differentmetalshavedifferentuses，forexample，steelisusedincars，andironisusedinelectricalequipment.Whenweusemetals，itisimportanttoknowhowtheyreactwithdifferentsubstances，forexample，waterandoxygen.Thereactionofmetalswiththesesubstancescanbeputi

2、norder.Hereisatablewiththemetalsthatreactmostatthetop，andthemetalsthatreactleastatthebottom.MetalHeatedinoxygenReactionwithwaterorsteamPotassiumBurnstoformanoxide*ReactingwithcoldwaterSodiumCalciumMagnesiumReactingwithsteamAluminiumZincIronReactsslowlyPartialreactionCopperPartialreacti

3、onNoreaction*anoxide＝anothersubstance＋oxygenPassageBASimpleScientificExperimentBelowisadescriptionofasimplescientificexperiment.Itshowsushowironreactswithairandwithwater.Aim:Tofindoutifironrusts(a)indryair；(b)inwaterthathasnoairinit(airfreewater)；(c)inordinarywater.Apparatus:3cleaniron

4、nails；testtubes；testtubeholder；cottonwool；oil；Bunsenburner.IronindryairMethod(1)Putsomeironnailsatthebottomofatesttube.(2)Pushsomecottonwooldownthetube.(3)Leavethetubeforoneweek.ResultAfteroneweek，thenailshavenotrusted.ConclusionIrondoesnotrustindryair.IroninairfreewaterMethod(1)Halffi

5、llatesttubewithwater.(2)Boilthewaterforthreeminutes.(Thismakessurethereisnoairinthewater.)(3)Puttwoorthreecleannailsinthewater.(4)Addsomeoiltothewater.Thiswillkeepairoutofthewater.(5)Leavethetubeforoneweek.ResultThenailsdonotrustinthetubewithairfreewater.ConclusionIrondoesnotrustinairf

6、reewater.IroninordinarywaterMethod(1)Halffillatesttubewithwaterandaddtwoorthreecleannails.(2)Leavethetubeforoneweek.ResultThenailsrustinthetubewithordinarywater.ConclusionIronrustsinordinarywater.文章A很难想象一个没有金属的世界。不同的金属有不同的用途，比如，钢材用于汽车中，铁用于电气设备(electricalequipment)中。当我们使用金属时，了解它们与不同的物质如

7、何反应(react)很重要，比如，水和氧气。(不同的)金属与这些物质的反应(reaction)程度可以按顺序排列。表中金属反应最强的排在上面，反应最弱的排在下面。金属在氧气中加热跟水或蒸汽反应钾(potassium)燃烧生成(form)氧化物(oxide)跟冷水反应钠(sodium)钙(calcium)镁(magnesium)跟蒸汽反应铝(aluminium)锌(zinc)铁反应缓慢局部反应铜(copper)局部(partical)反应无反应*一种氧化物＝另一种物质＋氧文章B一个简单的科学实验下面是对一个简单的科学实验的描述。它向我们展示铁如何与空气和水反应。目