1、Module 5 A Lesson in a Lab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？Chemical Change and Physical Change There are two kinds of changechemical change and physical change.In a chemical change,there is always a new substance formed.Breaking up water into hydrogen and oxygen is a chemical change.In each of the
2、 chemical change at least one new substance is formed.A change is not a chemical change if it doesnt form a new substance.Physical changes are very common,too.There are many examples.You can make a physical change by tearing a piece of paper into two,or by cutting a piece of iron with a lathe.Here t
3、he paper is still paper,and the iron is still iron.Another way of making physical change is dissolving something in water.When you dissolve salt in water,the salt disappears.You may think that a new substance has been formed.But in fact there is no new substance.The salt is still salt.You can still
4、taste it.So the dissolving of anything is a physical change.When water freezes,the change is also a physical one.The water changes from liquid to solid.But it is still the same substance.That is why the freezing of anything is a physical change.And people often tell the differences between a chemica
5、l change and a physical change through some experiments.We should try to explore the magical science world by doing experiments by ourselves.阅读障碍词 1hydrogen n氢气 2tear v撕扯 3lathe n车床 4freeze v结冰；冷冻 5magical adj.魔力的 诱思导读 根据短文内容，判断正误(T/F)1In a chemical change,there is always a new substance formed.()2B
6、reaking up water into hydrogen and oxygen is a physical change.()3Water changing from liquid to solid is a chemical change.()TFFSection Reading(Introduction&Reading and Vocabulary)新 生 词 汇 初 识.匹配下列单词的词性及汉语意思()1.expand An.电()2.mixtureBn.结论()3.electricityCn.混合物()4.conclusionDn.目标；目的()5.aimEn.设备；装备()6.r
7、eactFvi.形成 ()7.equipmentGvi.漂浮()8.ordinaryHvi.(化学)反应()9.float Ivi.膨胀()10.formJadj.普通的；平常的 答案 15 ICABD 610 HEJGF.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 1Do you want to add your name to the list？_ 2She likes to put everything in order in daily life._ 3Close the door and keep the cold ai
8、r out of the room._ 4Can you think of any other way to work out the problem？_ 5The answer is at the bottom of the page.Have you found it？_ 6The teacher was very angry when he found out that the student had been lying._ 答案 16 EBFADC 教 材 语 篇 细 研 Passage A It is hard to think of a world without metals.
9、Different metals have different uses,for example,steel is used in cars,and iron is used in electrical equipment.When we use metals,it is important to know how they react with different substances，for example,water and oxygen.The reaction of metals with these substances can be put in order.Here is a
10、table with the metals that react most at the top，and the metals that react least at the bottom.A 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。助读讲解 It is hard to.中 it 是形式主语，真正的主语是 to think of.。When we use m
11、etals 是 when 引导的时间状语从句，主句是 it is important to.，其中 it 是形式主语，动词不定式 to know.是真正的主语，而 how they react with different substances 是宾语从句，作 know 的宾语。that react most at the top是 that 引导的定语从句，修饰先行词 metals。Metal Heated in oxygen Reaction with water or steam Potassium Sodium Calcium Reacting with cold water Magn
12、esium Aluminium Zinc Burns to form an oxide Reacting with steam Iron Reacts slowly Partial reaction Copper Partial reaction No reaction Passage B A Simple Scientific Experiment Below is a description of a simple scientific experiment.It shows us how iron reacts with air and with water.,金属 在有氧状态下加热 与
13、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 B 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 Below is a description.是完全倒装句，主语是 a description，below is 是系表结构。show 后跟双宾语，us 为间接宾语，直接宾语是 how 引导的宾语从句。Aim：To find out if iron rusts(生锈)(a)in dry air;(b)in water that has no air
14、in it(airfree water);(c)in ordinary water.Apparatus：3 clean iron nails;test tubes;test tube holder;cotton wool;oil;Bunsen burner.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)。助读讲解 To find out if iron rusts 是目的状语，其中 if意为“是否”，引导宾语从句。that has no air in it 是 th
15、at 引导的定语从句，修饰先行词 water。Iron in dry air Method(1)Put some iron nails at the bottom of a test tube.(2)Push some cotton wool down the tube.(3)Leave the tube for one week.Result After one week,the nails have not rusted.Conclusion Iron does not rust in dry air.Iron in airfree water Method(1)Halffill a te
16、st tube with water.(2)Boil(煮沸)the water for three minutes.(This makes sure there is no air in the water.)(3)Put two or three clean nails in the water.(4)Add some oil to the water.This will keep air out of the water.(5)Leave the tube for one week.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
17、一周后，铁钉未生锈。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。)；(3)在水中放 23 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 there is no air in the water 是省略了引导词 that的宾语从句。Result The nails do not rust in the tube with airfree water.Conclusion Iron does not rust in airfree water.Iron in ord
18、inary water Method(l)Halffill a test tube with water and add two or three clean nails.(2)Leave the tube for one week.Result The nails rust in the tube with ordinary water.Conclusion Iron rusts in ordinary water.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 23 颗洁净的铁钉；(2)把试管放置一周。结果 铁钉在装有
19、普通水的试管中生锈。结论 铁在普通的水中会生锈。第一步 速读了解文章主题和段落大意 速读 P4445 教材课文，回答下列问题 1Read Passage A and choose the best title for it.AThe Different Uses of Metals BThe Reaction of Metals CThe Reaction of Metals with Oxygen DThe Reaction of Metals with Water 答案 B 2Read the subtitles in Passage B and answer what should be
20、 included in a description of an experiment.(1)_(2)_(3)_(4)_(5)_ AimApparatusMethodResultConclusion第二步 细读把握文章关键信息 细读 P4445 教材课文，选择最佳答案 1The table in the passage is arranged in order of _.Ametal kinds Breaction activities Cvalues of metal Dthe first letters of the words 2According to the table,which
21、metal is most suitable to make our daily kitchenware(厨房)?AZinc.BIron.CCopper.DMagnesium.3The experiment in Passage B shows us _ Ahow iron rusts with water Biron is quite easy to rust Chow to prevent iron from rusting Dhow iron reacts with air and with water 4 The purpose of these three experiments i
22、n Passage B is _ Ato find out how iron reacts with water and with air Bto find out how important iron is Cto find out how to do the experiment of irons reaction with water and with air Dto find out how to keep iron rustless 答案 14 BCDD 第三步 研读能力升华 接轨高考 根据 P4445 教材课文，在空白处填入 1 个适当的单词或括号内单词的正确形式 Differen
23、t metals have different uses.When we use metals，it is important 1._(know)how they react with 2._(differ)substances.By doing some simple experiments，we can achieve the 3._(follow)aims.Firstly，put them 4._ order according to know different following in to the reaction.Secondly，find out if iron rusts i
24、n dry air，in airfree water and in ordinary water.In order to achieve the second aim，we need different pieces of 5._(equip).6._(make)full preparations，we can go to the different stages of the experiment.During each stage，relative methods should 7._(use)After that，we 8._(get)different results and make the conclusions 9._ iron does not rust in dry air and in airfree water 10._ it rusts in ordinary water.equipment Having made be used will get that but Thank you for watching!
