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1、Module 5 A lesson in a lab,Read 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 A,Read the passage again and answer the following questions :,1. Which of the metals in the table reacts
2、 the most with oxygen and water? potassium, calcium and sodium 2. What happens when you heat calcium in oxygen ? It begins to form an oxide.,3. Which metals react with steam ? Magnesium, aluminium and zinc 4. Does iron have a slow or fast reaction with steam? It has a slow reaction. 5. Does copper r
3、eact with water? No, it doesnt .,Read the passage and complete the sentences.,Passage B,1. In the first part of the experiment, the _ is dry ,not wet . 2. It shows that iron _ when the air is dry . 3. In the second part of the experiment, you must _ the water to make sure there is no _ in it .,air,d
4、oes not rust,boil,air,4. You add _ to the water because this keeps _ out of it. 5. It shows that _ does not rust in water that has no _ in it .,some oil,air,nail,air,Complete the passage with proper words according to passage A and B,It is hard to think of a world without metals. Different metals ha
5、ve different metals have different uses, for example, iron can be used in _ equipment. But above all we should know whether it,electrical,will _ under different conditions otherwise it will keep the equipment from working well. As we all know, if iron is heated in oxygen, it will react slowly but wi
6、ll not form an _.,react,oxide,On the other hand , if it is put together with water or _, there will a _ reaction. Next lets do an _ to support the above . First , get a test tube fillde with water and put it over the _ to _ for three minutes .,steam,partial,experiment,bunsen burner,boil,Then put thr
7、ee or four clean nails in the water with some oil added to it and leave the tube for one week . What happens? The iron does not _ in air-free water. Another experiment , if you put the nails in the tube with the air in it for one week, then what happens ? Iron rusts in _ water .,rust,ordinary,Read t
8、he passage again and answer the questions :,1. What substances were they using ? Baking soda and hydrochloric acid 2. What substances were the students making ? Salt,3. How can they make the reaction quicker ? By making the mixture hotter. 4. What mistakes did Paul make? He used the wrong liquid .,L
9、earn the new words by heart. Read the passage A and B and try to retell it .,Assignments for you,镜头再现,The earth is forty-nine times larger than the moon . The more books I read, the more information I learn.,上面两个句子中重点强调的是比较级。这一语法现象我们在初中已学过,现在我们对这一语法进行总结。,三种比较句型的转换： 1) A+be+four times +比较级than +B 2)
10、A+be+four times+as+adj/adv+as +B 3) A+be+four times +the +N of B,The well is four times deeper than that one. = The well is four times as deep as that one. =The well is four times the depth of that one.,一个固定句型: the +比较级, the +比较级,The more often you stay with him, the better you will find he is. The
11、faster we walk, the more likely we will be to catch the bus. The more, the better. The sooner, the better.,1. That doesnt sound very frightening, Paul. Ive seen _. What did you like most about the film ? A. better B. worse C. best D. worst,Choose the best,2. The number of people present at the conce
12、rt was _than expected. There were many tickets left. A. much smaller B. much more C. much larger D. many more,3. He speaks English well indeed, but, of course , not_a native speaker. A. as fluent as B. more fluent than C. so fluently as D. much fluently than 4. It is reported that the United States
13、uses _energy as the whole of Europe. A. as twice B. twice much C. twice much as D. twice as much,5. As far as I am concerned, education is about learning and the more you learn, _. A. the more for life are you equipped B. the more equipped for life you are C. the more life you are equipped for D. yo
14、u are equipped the more life,镜头再现,The reaction of metals with these substances can be put in order . In order /in order /in the order of /out of order,1. 在图书馆，图书通常是按作者姓氏的第一个字母顺序排列的。 In the library, books are usually put in the order of the first letter of the writers surname . 2. 他桌子上的书摆放整齐有序。 The books on his desk are in order (orderly).,将下列句子翻译成英语,Finish the exercises on grammar on page 43 and page 47.,Homework for you,
