2019-2020学年高中英语 Module 5 A Lesson in a Lab Section

Module5ALessoninaLab2有两种变化：化学变化和物理变化，那么你知道化学变化和物理变化的区别吗？ChemicalChangeandPhysicalChangeTherearetwokindsofchange－chemicalchangeandphysicalchange.34Inachemicalchange,thereisalwaysanewsubstanceformed.Breakingupwaterintohydrogenandoxygenisachemicalchange.Ineachofthechemicalchangeatleastonenewsubstanceisformed.Achangeisnotachemicalchangeifitdoesn'tformanewsubstance.Physicalchangesareverycommon,too.Therearemanyexamples.Youcanmakeaphysicalchangebytearingapieceofpaperintotwo,orbycuttingapieceofironwithalathe.Herethepaperisstillpaper,andtheironisstilliron.5Anotherwayofmakingphysicalchangeisdissolvingsomethinginwater.Whenyoudissolvesaltinwater,thesaltdisappears.Youmaythinkthatanewsubstancehasbeenformed.Butinfactthereisnonewsubstance.Thesaltisstillsalt.Youcanstilltasteit.Sothedissolvingofanythingisaphysicalchange.Whenwaterfreezes,thechangeisalsoaphysicalone.Thewaterchangesfromliquidtosolid.Butitisstillthesamesubstance.Thatiswhythefreezingofanythingisaphysicalchange.6Andpeopleoftentellthedifferencesbetweenachemicalchangeandaphysicalchangethroughsomeexperiments.Weshouldtrytoexplorethemagicalscienceworldbydoingexperimentsbyourselves.7[阅读障碍词]1．hydrogenn．氢气2．tearv．撕扯3．lathen．车床4．freezev．结冰；冷冻5．magicaladj.魔力的8[诱思导读]根据短文内容，判断正误(T/F)1．Inachemicalchange,thereisalwaysanewsubstanceformed.()2．Breakingupwaterintohydrogenandoxygenisaphysicalchange.()3．Waterchangingfromliquidtosolidisachemicalchange.()FTF9SectionⅠWarmingUp,Prereading&Reading10新生词汇初识11Ⅰ.匹配下列单词的词性及汉语意思()1.expandA．n.电()2.mixtureB．n.结论()3.electricityC．n.混合物()4.conclusionD．n.目标；目的()5.aimE．n.设备；装备12()6.reactF．vi.形成()7.equipmentG．vi.漂浮()8.ordinaryH．vi.(化学)反应()9.floatI．vi.膨胀()10.formJ．adj.普通的；平常的[答案]1－5ICABD6－10HEJGF13Ⅱ.选择下列句中词组的汉语意思A．想出；考虑B．将……按顺序排列C．弄清楚，查明D．在底端E．往……加入……F．把……关在外面1．Doyouwanttoaddyournametothelist？2．Shelikestoputeverythinginorderindailylife.3．Closethedoorandkeepthecoldairoutoftheroom.144．Canyouthinkofanyotherwaytoworkouttheproblem？5．Theanswerisatthebottomofthepage.Haveyoufoundit？6．Theteacherwasveryangrywhenhefoundoutthatthestudenthadbeenlying.[答案]1－6EBFADC15教材语篇细研16PassageAItishardtothinkofaworldwithoutmetals.①Differentmetalshavedifferentuses,forexample,steelisusedincars,andironisusedinelectricalequipment.Whenweusemetals,itisimportanttoknowhowtheyreactwithdifferentsubstances②，forexample,waterandoxygen.Thereactionofmetalswiththesesubstancescanbeputinorder.Hereisatablewiththemetalsthatreactmostatthetop③，andthemetalsthatreactleastatthebottom.17A篇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，钢用来造车，铁用来造电力设备。使用金属时，要了解金属和不同的物质(例如水和氧)如何发生反应，这一点很重要。(不同的)金属与这些物质的反应程度可以按顺序排列起来。下面表格中的金属反应最强烈的排在上面，反应最弱的排在下面。18[助读讲解]①Itishardto...中it是形式主语，真正的主语是tothinkof...。②Whenweusemetals是when引导的时间状语从句，主句是itisimportantto...，其中it是形式主语，动词不定式toknow...是真正的主语，而howtheyreactwithdifferentsubstances是宾语从句，作know的宾语。③thatreactmostatthetop是that引导的定语从句，修饰先行词metals。19MetalHeatedinoxygenReactionwithwaterorsteamPotassiumSodiumCalciumReactingwithcoldwaterMagnesiumAluminiumZincBurnstoformanoxideReactingwithsteamIronReactsslowlyPartialreactionCopperPartialreactionNoreaction20PassageBASimpleScientificExperimentBelowisadescriptionofasimplescientificexperiment.④Itshowsushowironreactswithairandwithwater.⑤21金属在有氧状态下加热与水或水蒸气的反应钾钠钙与冷水反应镁铝锌燃烧后生成氧化物与水蒸气反应铁反应缓慢部分反应铜部分反应不反应22B篇一个简单的科学实验下面是对一个简单科学实验的描述。这篇文章向我们表明，铁是怎样与空气和水反应的。[助读讲解]④Belowisadescription...是完全倒装句，主语是adescription，belowis是系表结构。⑤show后跟双宾语，us为间接宾语，直接宾语是how引导的宾语从句。23Aim：Tofindoutifironrusts(生锈)⑥(a)indryair;(b)inwaterthathasnoairinit⑦(air­freewater);(c)inordinarywater.Apparatus：3cleanironnails;testtubes;testtubeholder;cottonwool;oil;Bunsenburner.目的：发现铁是否在下列状态下生锈：(a)在干燥的空气中；(b)在没有空气的水中(无空气水)；(c)在普通的水中。仪器：三颗洁净的铁钉、试管、试管夹、棉花、油、本生灯(即煤气灯)。24[助读讲解]⑥Tofindoutifironrusts是目的状语，其中if意为“是否”，引导宾语从句。⑦thathasnoairinit是that引导的定语从句，修饰先行词water。25IronindryairMethod(1)Putsomeironnailsatthebottomofatesttube.(2)Pushsomecottonwooldownthetube.(3)Leavethetubeforoneweek.26ResultAfteroneweek,thenailshavenotrusted.ConclusionIrondoesnotrustindryair.Ironinair­freewaterMethod27(1)Half­fillatesttubewithwater.(2)Boil(煮沸)thewaterforthreeminutes.(Thismakessurethereisnoairinthewater⑧.)(3)Puttwoorthreecleannailsinthewater.(4)Addsomeoiltothewater.Thiswillkeepairoutofthewater.(5)Leavethetubeforoneweek.28铁在干燥的空气中方法(1)把若干铁钉置于试管底部；(2)顺着试管塞入一些棉花；(3)把试管放置一周。结果一周后，铁钉未生锈。29结论铁在干燥的空气中不生锈。铁在不含空气的水中方法(1)在试管中加一半水；(2)将水烧开保持3分钟(这样做可以保证水中无空气。)；30(3)在水中放2～3颗洁净的铁钉；(4)在水中加些油，这样做可防止空气进入水；(5)把试管放置一周。[助读讲解]⑧thereisnoairinthewater是省略了引导词that的宾语从句。31ResultThenailsdonotrustinthetubewithair­freewater.ConclusionIrondoesnotrustinair­freewater.IroninordinarywaterMethod(l)Half­fillatesttubewithwaterandaddtwoorthreecleannails.(2)Leavethetubeforoneweek.32ResultThenailsrustinthetubewithordinarywater.ConclusionIronrustsinordinarywater.33结果铁在没有空气的水中未生锈。结论铁在没有空气的水中不生锈。铁在普通的水中方法(1)在试管中加一半水，并在水中放2～3颗洁净的铁钉；(2)把试管放置一周。34结果铁钉在装有普通水的试管中生锈。结论铁在普通的水中会生锈。35第一步速读——了解文章主题和段落大意速读P44－45教材课文，回答下列问题1．ReadPassageAandchoosethebesttitleforit.A．TheDifferentUsesofMetalsB．TheReactionofMetalsC．TheReactionofMetalswithOxygenD．TheReactionofMetalswithWater[答案]B362．Readthesub