Reading module 5 A lesson in a Lab.ppt

1、外研版 高一年级 (必修1) Module 5,Module 5 A Lesson in a Lab,What can you see in these pictures?,Potassium ptsm 钾 Sodium sdm 钠 Calcium klsm 钙 Magnesium mgni:zim 镁 Aluminium ljmnim 铝,Read the passage and choose the best title for it.,The Different Uses of Metals The Reaction of Metals The Reaction of Metals wi

2、th Oxygen,Passage A,The Reaction of Metals,Read the passage again. Answer these 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 burns to form an oxide.,3. Which metals react with

3、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 doesnt.,Complete the passage with proper words according to passage A. Metals are very important, so when using them we should know how they _ w

4、ith different substances. Take iron used in _ equipment for example, when _ in oxygen, it will react slowly. When it is put together with water or _, there will be a partial _.,reaction,react,electrical,heated,steam,Read the passage and fill in the table.,cotton wool,water,water,Passage B,nails,wate

5、r,Iron does not rust,Iron does not rust,Iron rusts,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,Read the passage a

6、gain. Complete the sentences.,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 m

7、etals have different uses, for example, iron can be used in _ equipment. But above all we should know whether it 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 _. On the

8、 other hand, if it is put together with water or _, there will be a _ reaction. Next lets do an _ to support the above. First, get a test tube filled with water and put it over the _ to _ for three minutes.,oxide,electrical,react,steam,partial,experiment,Bunsen burner,boil,Then put three or four cle

9、an 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,Language points,1.When y

10、ou heat a metal, it contracts.,contract v. (使)收缩；和订合同 n. 契约，合同 e.g.1.If you ice the metal, it will contract. 2.We contracted with a shoe factory for 4,000 pairs of shoes. 3.He made a two-year contract of employment with the firm.,(他和这个公司签了一个两年的工作合同）,（我们和一个制鞋厂签订了制作4000双鞋的合同）,这两个形容词均含有“普通的，普遍的”之意。 com

11、mon: 多用于指物，侧重很常见，不稀奇。 ordinary: 用于物，指每天发生，十分平淡无奇；用于人，指无特别之处，很一般。,Common sense 常识 Ordinary people 普普通通的人,2. Common & ordinary,e.g. Snow is ( )in many cold countries. As an ( ) people, I dont expect too much in my life.,common,ordinary,3.You add some oil to the water because his keeps air out of it. keep . out of 防止进入；不让靠近 Keep the baby out of the sun. 别让孩子晒着。,keep (sb.) away (from sth.) 使(某人)离开(某物) keep sb. from d