1、Reading and vocabularyRead the passage as quickly as you can and choose the best title for it.The Different Uses of Metals The Reaction of Metals The Reaction of Metals with Oxygen Passage AWe can reach a conclusion that it isimportant for us to read books.It is our aim to build up a harmonious soci
2、ety.It is a piece of electrical equipment.The stone contains potassiumsodiumcalcium magnesium The wheel is made of aluminum.zinc oxideNails are easy to rust in the damp air.Water boils at 100 C.conclusionaimelectricalpotassiumsodiumcalciummagnesium aluminumzinc copperoxiderustboilsRead the passage a
3、gain and answer the following questions:1.Which of the metals in the table reacts the most with oxygen and water?Potassium,calcium and sodium.2.What happens when you heat calcium in oxygen?It burns to form an oxide.3.Which metals react with steam?Magnesium,aluminium and zinc.4.Does iron have a slow
4、or fast reaction with steam?It has a slow reaction.5.Does copper react with water?No,it doesnt.Read the passage and fill in the chart.Iron in dry airIron in air-free waterIron in ordinary waterStage A(starting experiment)cotton woolwater water Passage BStage B(1 week later)Stage C(Result)nailswater
5、Iron does not rustIron does not rust Iron rustsRead the passage again and completethe sentences.1.In the first part of the experiment,the _ is dry,not wet.2.It shows that iron _ when the air is dry.airdoes not rust3.In the second part of the experiment,you must _ the water to make surethere is no _
6、in it.4.You add _ to the waterbecause this keeps _ out of it.5.It shows that _ does not rust inwater that has no _ in it.boilairsome oilairnailairHomework 1.Learn the new words and important sentences by heart.2.Read Passage A and B and try to retell it.基础落实.高频单词思忆 1.We climbed out of the hole,right
7、 in front of two (惊讶的)policemen.2.This is a 5star hotel with perfect (设备).3.The new taxes came as a shock to (普通的)Americans.4.The population of the town (膨胀)rapidly in the 1960s.astonished facilities ordinary expanded 5.From these facts we can draw some (结论)about how the pyramids were built.6.I thin
8、k the sudden break of the electricity has something to do with an (电的)fault.7.They carry logs by (漂)them down the river.conclusions electrical floating 8.The professor is giving a series of (讲座)on molecular biology.9.This drink is a (混合物)of three different sorts,so it has several tastes.10.Try to ke
9、ep a (平衡)between work and relaxation.lectures mixture balance.重点短语再现 1.add.给增加add 使增加 add to总计；总共 2.the bottom 在的底部 the bottom of ones heart从心底里；由衷地 3.be of对感到自豪；骄傲take in以为自豪 4.be supposed 理应；被认为是I suppose 我看可以 5.in order按顺序摆放 order整 齐；条理out order次序颠倒 to to up at of from proud pride to so put in of
10、 6.think 考虑；想到think 想出(主意 等)think 仔细考虑think 再 三考虑；慎重思考 e up 突然想起come to 苏醒；活跃起来 8.from that moment 从那一刻起from on从那时起from on从现在起 9.turn轮流 by 轮流地；依次地 take to do.轮流做turn 结果是 10.react 与发生反应react (人)对作出反应 of up over twice with life on then now in turns turns out with to.典型句式运用 1.Two-thirds of the earths s
11、urface is water.地球表面的三分之二是水。考查分数的表达法和主谓一致 这里三分之一的书是属于他的。考点提炼句子仿造One third of the books here belong to him.2.The earth is forty-nine times larger than the moon.地球比月球大四十九倍。考查倍数表达法 新修的路比原来的路宽3倍。考点提炼句子仿造The newly-built road is three times wider than that old one.3.Its hard to think of a world without me
12、tals.很难想像一个没有金属的世界。考查句式It is+adj.+(for/of sb.)+to do sth.把伞忘在出租车上，你真粗心。考点提炼句子仿造Its careless of you to leave your umbrella in the taxi.4.The closer you are,the more youll see.你靠的越近，看到的就越多。考查The more.,the more.句式 你越是努力，取得的进步就越大。考点提炼句子仿造youll make.The harder you study,the more progress 5.Below is a des
13、cription of a simple scientific experiment.下面是对一个简单的科学实验的描述。考查倒装句式 我们靠天吃饭的日子一去不复返了。考点提炼句子仿造Gone are the days when we had to be at the mercy of the weather.导练互动 重点单词 1.contract v.(使)收缩；和订合同;n.契 约，合同 When you heat a metal,it contracts.当你给金属加热时,它会收缩。（回归课本P41）观察思考 If you ice the metal,it will contract.如
14、果你冷冻金属，它就会收缩。We contracted with a shoe factory for 4,000 pairs of shoes.我们和一家鞋厂签订了一份4 000双鞋的合同。He made a two-year contract of employment with the firm.他和那家公司签订了两年的雇用合同。归纳拓展 make a contract with 与签合同 sign a contract签署合同 carry out a contract 履行合同 cancel a contract取消合同 break a contract违反合同 by/on contra
15、ct按照合同；依约 活学活用 You should read the carefully before you sign it.A.contrast B.contact C.contract D.conflict 解析 考查名词词形和词义的辨析。contract合同；contrast对照，对比；contact联系，接触；conflict冲突。C2.conclusion n.结论；断定；结束；结局；协定，协议 观察思考 What conclusion do you draw from the evidence?你从证据中得到了什么结论？From what you say I conclude t
16、hat you are right.根据你的话我断定你是对的。The play concluded with the death of the entire cast.该剧以全体剧中人物之死为结局。In conclusion,I wish all of you good health and a long life.最后，我祝大家健康长寿。归纳拓展 conclusion作“结束，结尾”讲时常用单数，用 作“结论”讲时为可数名词，用作“协议，缔结”讲时为不可数名词。come to/arrive at/reach/draw a conclusion得 出结论 bring.to a conclusi
17、on使结束 in conclusion最后 conclude v.结束；断定;订立 conclude with以而结束 conclude sth.from sth.从某事中得出某个结论 conclude sth.(with)sb.与某人达成(协定)活学活用 David from the analysis of the traffic accident that it had been caused by human error.A.announced B.acknowledged C.concluded D.considered 解析 句意为：David从交通事故分析中推断出这次交通事故是人为
18、错误导致的。C3.react vi.回应；起作用；起反应 Which of the metals in the table reacts the most with oxygen and water?表格中的金属哪一个与氧气和水反应最厉害？(回归课本P44)观察思考 How did Wilson react to your idea?威尔逊对你的想法反应如何？Iron reacts with water and air to produce rust.铁和水及空气发生反应生成锈。Most people reacted against the passing of the law.多数人反对通过
19、这项法律。Applause can react greatly on/upon a speaker.听众的掌声对演讲人有很大影响。归纳拓展 react的含义及用法：(1)作出反应，回应(与to连用);(2)反对，反抗，反动(与against连用);(3)(指物质)起化学反应(与with连用);(4)对某事物有影响，对某事物产生变化(与介词on连用)。活学活用 The football player reacted the judges decision by withdrawing from the match.A.on B.to C.against D.by 解析 表示“人对作出反应”用to
20、。B4.ordinary adj.普通的；平常的；n.常事；惯例 The nails rust in the tube with ordinary water.在有普通水的试管里的铁钉生锈。(回归课本P45)观察思考 Today he came earlier than usual,for it was not an ordinary day.他今天来得比平常早，因为今天是一个不平常的 日子。He is out of the ordinary among the children.他是一个不寻常的孩子。易混辨异 ordinary/common/usual/normal(1)ordinary普通
21、的，平常的，平凡的。强调在等 级和类属方面普通。指人时，该词指既不显赫也 不低贱；指物时指品质或质地水平一般。有“平 庸无奇”之意。(2)common普通的；常见的。强调经常发生，司空 见惯，不显赫或不特别，可修饰人或物。也可指 共同的，共存的。The plants are common here.这些植物在这里很普遍。(3)usual通常的；惯常的，惯例的。强调依照惯 例来判断，有“遵循常规”之意。It is usual for him to go back home late.他回家晚是常事。(4)normal正常的，合乎标准的。强调在正常情况 下应有的。His temperature was two degrees above normal.他的体温比正常体温高两度。