1、Module 5A Lesson in a LabPeriod 1Introduction&Reading and Vocabulary文本研读课.根据汉语提示及课文语境写出正确的单词1.When you heat a metal,it _(膨胀).2.Steel is a _(混合物)of iron and other _(物质).3.Here is a table with the metals that _(反应)most at the top.expandsmixturesubstancesreact4.Iron does not _(生锈)in dry air.5._(煮沸)the
2、water for three minutes.6.Iron rusts in _(普通的)water.7.In _(总结),walking is a cheap,safe and enjoyable form of exercise.8.The conference marked an important _(阶段)in the two countries relationship.rustBoilordinaryconclusionstage.补全短语1.a mixture _一种与的混合物2.think _想象;想出3._the top of在顶部4.react _与反应5.add._.
3、把加入到ofofatwithto6.keep.out _不让进入7.put._order按顺序排列8.find _查明;弄清ofinout.阅读导引1.查阅一下元素周期表,看一下文中涉及的金属与水和氧气的反应情况。2.在课文中找出描写实验现象的句子。Step 1Leading inLook at the following pictures and write down their English names.balancetest tubeBunsen burnerflaskDiscussion:What substances do you know?Can you speak them i
4、n English?_Oxygen,potassium,sodium,calcium,magnesium,aluminium.Step 2Fast ReadingThink it over and summarize the general idea of the text.Passage A mainly talks about _;Passage B shows us _.the reaction of metalshow iron reacts with air and withwaterStep 3Careful Reading.Read the text carefully and
5、choose the best answers.1.According to Passage A,we know that_isoften used in cars,and_is often used in electrical equipment.A.steel;copperB.iron;zincC.steel;ironD.iron;copper2.According to the table,which metal is the most suitable to make our daily kitchenware?A.Zinc.B.Iron.C.Copper.D.Magnesium.3.
6、Which is NOT the equipment that is needed in the experiment of“Iron in dry air”?A.Cotton wool.B.Oil.C.Iron nails.D.Test tube holder.Read Passage B and place the following sentences in correct order.1.Put two or three clean nails in the water.2.Leave the tube for one week.3.Half-fill a test tube with
7、 water.4.Add some oil to the water.5.Boil the water for three minutes.Sentence explanation.1.When we use metals,it is important to know how they react with different substances,for example,water and oxygen.分析:(1)这是一个主从复合句,_引导一个时间状语从句,主句中_作形式主语,真正的主语是to know how.oxygen.。whenit(2)主句中包含一个_引导的宾语从句。句意:当我
8、们使用金属时,了解金属与不同的物质如何发生反应,例如水和氧气,这一点很重要。how2.Here is a table with the metals that react most at the top,and the metals that react least at the bottom.分析:句意:_,列于顶部的金属反应最剧烈,底部的则最缓慢。这里是一张金属反应表Step 4RetellingFill in the blanks with proper words according to Passages A and B.Metals are very important,so wh
9、en using them we should know how they 1._with different substances.Take iron used in 2._equipment for example,when 3._in oxygen,it will react slowly.When it isreactelectricalheatedput together with water or steam,there will be a partial 4._.reactionSo in order to find out if iron 5._in dry air,in ai
10、r-free water and in 6._water,we will have a simple scientific experiment.The first part of the experiment shows that iron doesnt rust in dry air.rustsordinaryIn the second part of the experiment,boil the water for three minutes to make sure there is no air in the water.You add some oil to the water because this 7._air out of it.It also shows thatiron does not rust in water 8._air.9._,the nails rust in the tube with ordinary water in the third part of the 10._.keepswithoutHoweverexperimentThat is how iron reacts with air and with water.
