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1、 Module 5 A Lesson in a Lab Warming up by learning vocabularyWords and Expressionsliquidexpandcontractsubstancemixtureoxygenelectricitystagen.n.液体液体vi.vi.膨胀膨胀vi.vi.收缩收缩n.n.物质物质n.n.混合物混合物n.n.氧气氧气n.n.电电n.n.阶段，时期阶段，时期Words and Expressionsconclusionaimreactionelectricalequipmentpartialoxiderustn.n.结论结论n
2、.n.目标，目的目标，目的n.n.反应反应adj.adj.与电有关的，用电的与电有关的，用电的n.n.设备，装备设备，装备adj.adj.部分的，局部的部分的，局部的n.n.氧化物氧化物vi.vi.生锈生锈Words and Expressionsboilordinarysteamfloatformdissolvebalanceflamevtvt.煮，煮沸煮，煮沸adj.adj.普通的，平常的普通的，平常的n.n.蒸汽，水蒸汽，水气气vi.vi.漂浮漂浮vi.vi.形成形成vi.vi.溶解，分解，分溶解，分解，分离离n.n.天平天平n.n.火焰火焰Words and Expressionsfa
3、cilitylecturedepartmentastonishedcalciummagnesiumzinccoppern.n.（常作复数）设备，工具（常作复数）设备，工具n.n.演讲演讲n.n.（大学的）科、系（大学的）科、系adj.adj.吃惊的，惊愕的吃惊的，惊愕的n.n.钙钙n.n.镁镁n.n.锌锌n.n.铜铜Put these words into three groups:air glass iron metal oil oxygen salt steam steel water1.Gas:2.Solid:3.Liquid:Steam air oxygen steamGlass ir
4、on metal salt steelOil waterGive the following things their correct names1.Crucible 2.Beaker3.Bunsen burner 4.Tube5.Tongs6.Nail7.Glass rod坩埚坩埚烧杯烧杯酒精灯酒精灯试管试管小钳子小钳子钉子钉子玻璃棒玻璃棒Fast reading:Read Passage A and choose the best title for it.A.The Different Uses of MetalsB.The Reaction of MetalsC.The Reactio
5、n of Metals with OxygenCareful reading It is hard to think of a world without metals.Different metals have different uses,for example,steel is used in cars,and iron is used in electrical equipment.A repeat version to the textWhen we use metals,it is important to know how they react with different su
6、bstances,for example,water and oxygen.The reaction of metals with these substances can be put in order.Here is a table with the metals that react most at the top,and metals that react least at the bottom.Read the following numbers out 2,000,000 (two million)5,100,000 (five million,one hundred thousa
7、nd)12,269,000 (twelve million,two hundred and thirty-nine thousandPractice:52,470,383 100,000,000365,528,462 1,000,000,000Read these fractions:1/4(a quarter)1/3 (a third)4/5(four-fifths)1/10 (one tenth)3/4(three quarters)1/2(a half)2/3(two-thirds)5/8 (five-eighths)9/10 (nine-tenths)Practice:Read the
8、 following out:1.1/2 of 6,000,000 2.35,246,000 plus 12,800,0003.25%of 200,000,000(three million)(forty eight million,sixty thousand)(fifty million)4.260,408,396 plus 5,284,7005.10%of 800,000,000(two hundred and sixty five million,six hundred and ninety-three thousand,ninety-six)(eighty million)Read
9、out the decimals below:0.5 (point five)2.5 (two point five)18.27 (eighteen point two seven)Practice:2 1/2 =2.5 (two point five)2 1/4=2.25(two point two five)3/4=0.75(point seven five)12 3/10=12.3(twelve point three)1.Conduct an experiment about something you see in your daily life.2.Try to repeat the text freely yourself.3.Learn the new words again,using the dictionary if necessary.