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1、 Module 5 A lesson in a lab Module 5Module 5A lesson in a lab 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 ARead the passage again and answer the following que
2、stions :1. Which of the metals in the table reacts the most with oxygen and water? potassium, calcium and sodium2. What happens when you heat calcium in oxygen ? It begins to form an oxide.3. Which metals react with steam ? Magnesium, aluminium and zinc4. Does iron have a slow or fast reaction with
3、steam? It has a slow reaction.5. Does copper react with water? No, it doesnt .Read the passage carefully and fill the chart on page 45. Read the passage again and complete the sentences. Passage B1. In the first part of the experiment, the _ is dry ,not wet .2. It shows that iron _ when the air is d
4、ry .3. In the second part of the experiment, you must _ the water to make sure there is no _ in it .airdoes not rustboilair4. 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 oilairnail airComplete the passage with proper words
5、 according to passage A and BIt is hard to think of a world without metals. Different metals have different metals have different uses, for example, iron can be used in _ equipment. But above all we should know whether itelectricalwill _ under different conditions otherwise it will keep the equipmen
6、t from working well. As we all know, if iron is heated in oxygen, it will react slowly but will not form an _. reactoxideOn 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 o
7、ver the _ to _ for three minutes . steampartialexperimentbunsen burnerboilThen put three 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 ai
8、r in it for one week, then what happens ? Iron rusts in _ water . rustordinaryRead about an incident during a chemistry lesson and choose the best summary.Reading on P931.A student didnt follow the instructions carefully . He took the wrong liquid from the cupboard and nearly poisoned the class . 2.
9、The chemistry teacher was demonstrating an experiment when she heated a poisonous liquid . There was so much smoke that the students had to leave the room . 3. A student was doing a chemistry experiment when he accidentally heated the wrong liquid and caused an incident in the laboratory .Read the p
10、assage again and answer the questions :1. What substances were they using ? Baking soda and hydrochloric acid2. 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 .1. Why di
11、d he make the mistake ? Because there was no label on the bottle .2. What happened when Paul heated the liquid ? It formed a thick cloud of white gas.3. Why did the teacher send the students out of the room? Because the liquid was acrylamide and the gas was poisonous .4. What lesson did the incident
12、 teach the students and the teacher? Never to leave a bottle without a label in the chemistry lad .1.Learn the new words by heart.2.Read the passage A and B and try to retell it .Assignments for you (language points)(language points)镜头再现镜头再现1.The earth is forty-nine times larger than the moon .2.The
13、 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。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这一语法现象我们在初中已学过,现在现在我们对这一语法进行总结。我们对这一语法进行总结。三种比较句型的转换：三种比较句型的转换：1) A+be+four times +比较级比较级than +B2) A+be+four times+as+adj/adv+as +B3) A+be+four times +the +N of BThe well is four times deeper than that o
14、ne.= The well is four times as deep as that one.=The well is four times the depth of that one.哪一些词可以来修饰比较级？哪一些词可以来修饰比较级？1) much/rather/a bit/a little/a lot/a great deal/any/2) 倍数、分数、百分数、小数倍数、分数、百分数、小数3) 一些名词一些名词The weather in winter in Beijing is much colder than that in Shanghai.This book is 50% pe
15、rcent more expensive than that one.John is a head taller than I.一个固定句型一个固定句型: the +比较级比较级, the +比较级比较级The more often you stay with him, the better you will find he is.The 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
16、 frightening, Paul. Ive seen _. What did you like most about the film ? A. better B. worse C. best D. worst Choose the best2. The number of people present at the concert was _than expected. There were many tickets left. A. much smaller B. much more C. much larger D. many more3. He speaks English wel
17、l 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 uses _energy as the whole of Europe. A. as twice B. twice much C. twice much as D. twice as much5. Mary kept weighing herself to see h
18、ow much _she was getting. A. heavier B. heavy C. the heavier D. the heavier 6. The house rent is expensive . Ive got about half the space I had at home and Im paying _here. A. as three times much B. as much three times C. much as three times D. three times as much 7. Our neighbour has_ ours. A. as a
19、 big house as B. as big a house as C. the same big house as D. a house the same big as 8. 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. you are equi
20、pped the more life 镜头再现镜头再现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。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.
21、他桌子上的书摆放整齐有序。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将下列句子翻译成英语3. 请按照正确的顺序将下列单词排列。请按照正确的顺序将下列单词排列。 Please put the following words in the correct order .4. 我们这次是按照年龄顺序而不是按照我们这次是按照年龄顺序而不是按照身高站队。身高站队。 This time we stood in line in the order of age instead of in the order of
22、 height .镜头再现镜头再现Half-fill a test tube with water . fill with = be full of将下列句子翻译成英语将下列句子翻译成英语1. 请将这个瓶子装满水。请将这个瓶子装满水。 Please fill the bottle with water .2. 听到母亲的话听到母亲的话,他顿时充满了自信。他顿时充满了自信。 Hearing mothers words , he was filled with confidence immediately.3. 他满脑子都是知识他满脑子都是知识, 但他不是一个书但他不是一个书呆子。呆子。 His
23、brain is filled with knowledge but he is not a bookworm .4. 看到这个恐怖电影看到这个恐怖电影,这个女孩心中充满这个女孩心中充满了恐惧。了恐惧。 Seeing such a frightening film, the girl was filled with horror.镜头再现镜头再现Add some oil to the water . addto/add to /addup/add up to 1. 毫无疑问这是火上浇油。毫无疑问这是火上浇油。 There is no doubt that it is like adding o
24、il to the fire .2. 这些新建的公园增添了这个城市的美丽。这些新建的公园增添了这个城市的美丽。 These newly-built gardens add to the beauty of the city .3. 1到到100 加起来总计是加起来总计是5050。 1,2,3.and 100 adds up to 5050.4. 把这些数字加起来然后告诉我结果。把这些数字加起来然后告诉我结果。 Add all these numbers up and tell me the result .5. 8_5 is 13. A. add to B. added up to C. ad
25、ded up D. added to 镜头再现镜头再现This will keep air out of the water. keep out of /keep out /keepfrom / keep off /keep up with1.Before you go to bed youd better close the doors and windows to _ thieves _.2.The fire is dangerous so you should _ the child _ the fire.3.Please _ the grass.keepoutkeepoffkeep o
26、ff1. I had to walk faster than before so that I could _ him.2. In winter we usually put on more clothes in order to _ the cold _.3. I wonder what _ him _ attending the meeting yesterday.keep up with keepoutkeptfrom4. Youd better _ yourself _ their quarrel. It is none of your business.5. Close the door please so that we can _ the heat _ the room .keepout of keepout ofFinish the exercises on grammar on page 43 and page 47.Assignments for you同学们来学校和回家的路上要注意安全同学们来学校和回家的路上要注意安全同学们来学校和回家的路上要注意安全同学们来学校和回家的路上要注意安全
