1. Module 5 A lesson in a lab Module 5 A lesson in a lab Module 5 A lesson in a lab

2. 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

3. Read the passage again 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 begins to form an oxide.

4. 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 react with water? No, it doesn’t.

5. Read the passage carefully and fill the chart on page 45. Read the passage again and complete the sentences. Passage B

6. 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 does not rust boil air

7. 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

8. Complete the passage with proper words according to passage A and B It 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 it electrical

9. 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 will not form an _____. react oxide

10. On the other hand, if it is put together with water or _____, there will a ______ reaction. Next let’s 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

11. Then 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 air in it for one week, then what happens ? Iron rusts in _______ water. rust ordinary

12. Read about an incident during a chemistry lesson and choose the best summary. Reading on P93

13. 1.A student didn’t follow the instructions carefully. He took the wrong liquid from the cupboard and nearly poisoned the class. 2.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.

14. 3. A student was doing a chemistry experiment when he accidentally heated the wrong liquid and caused an incident in the laboratory.

15. Read the 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

16. 3. How can they make the reaction quicker ? By making the mixture hotter. 4. What mistakes did Paul make? He used the wrong liquid.

17. 1. Why did 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.

18. 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 teach the students and the teacher? Never to leave a bottle without a label in the chemistry lad.

19. 1.Learn the new words by heart. 2.Read the passage A and B and try to retell it. Assignments for you

20. (language points)

21. 镜头再现 1.The earth is forty-nine times larger than the moon. 2.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。

22. 三种比较句型的转换： 1) A+be+four times + 比较级＋ than +B 2) 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.

23. 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 3) 一些名词

24. The weather in winter in Beijing is much colder than that in Shanghai. This book is 50% percent more expensive than that one. John is a head taller than I.

25. 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 faster we walk, the more likely we will be to catch the bus. The more, the better. The sooner, the better.

26. 1. That doesn’t sound very frightening, Paul. I’ve seen _______. What did you like most about the film ? A. better B. worse C. best D. worst Choose the best

27. 2. 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 more

28. 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 uses ___energy as the whole of Europe. A. as twice B. twice much C. twice much as D. twice as much

29. 5. Mary kept weighing herself to see how much _____she was getting. A. heavier B. heavy C. the heavier D. the heavier

30. 6. The house rent is expensive. I’ve got about half the space I had at home and I’m paying _____here. A. as three times much B. as much three times C. much as three times D. three times as much

31. 7. Our neighbour has__________ ours. A. as a big house as B. as big a house as C. the same big house as D. a house the same big as

32. 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 equipped the more life

33. 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

34. 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

35. 3. 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 身高站队。 This time we stood in line in the order of age instead of in the order of height.

36. 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 1. 请将这个瓶子装满水。 Please fill the bottle with water. 2. 听到母亲的话, 他顿时充满了自信。 Hearing mother’s words, he was filled with confidence immediately.

37. 3. 他满脑子都是知识, 但他不是一个书 呆子。 His brain is filled with knowledge but he is not a bookworm. 4. 看到这个恐怖电影, 这个女孩心中充满 了恐惧。 Seeing such a frightening film, the girl was filled with horror.

38. 镜头再现 Add some oil to the water. add…to…/add to …/add…up/add up to 1. 毫无疑问这是火上浇油。 There is no doubt that it is like adding oil to the fire. 2. 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.

39. 3. 1 到 100 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。 Add all these numbers up and tell me the result. 5. 8_________5 is 13. A. add to B. added up to C. added up D. added to

40. 镜头再现 This will keep air out of the water. keep …out of /keep …out /keep…from …/ keep off /keep up with 1.Before you go to bed you’d better close the doors and windows to ____ thieves ___. 2.The fire is dangerous so you should ____ the child __ the fire. 3.Please _______ the grass. keep out keep off keep off

41. 1. 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 keepout keptfrom

42. 4. You’d better ____ yourself _____ their quarrel. It is none of your business. 5. Close the door please so that we can ____ the heat _____ the room. keep out of keep out of

43. Finish the exercises on grammar on page 43 and page 47. Assignments for you