Module_5_A_Lesson_in_a_Lab_课文教案课件123123.ppt

1、Module 5 A lesson in a Lab,外研社 高中英语 第一册,new words,1.了解与学习与科技、实验有关的词汇和知识。 提升对科学实验的兴趣，形成正确的科学态度。,Teaching Aims,lab,test tube,balance,vocabulary related to science and experiments,test tube holder试管架/夹,Bunsen burner,crucible,本生灯（煤气喷灯）,坩埚,It is a piece of electrical equipment.,Read the words together,Th

2、e stone contains(含有)potassium,calcium,The wheel is made of aluminum.,zinc,oxide,We can reach a conclusion that it is important for us to read books.,Nails are easy to rust in the damp air.,Water boils at 100 C.,conclusion,aim,electrical,rust,boils,When the iron is heated(加热） it will When the iron is

3、 cooled(遇冷） it will,expand,contract,How much do you know about general science?,How many states does matter exist as?,Use your mind!,solid,liquid,gas,How many states does water exist as ?,oxygen,metal,How much do you know about general science?,1. Water exists as a solid, aliquid and a gas. 2. When

4、you heat a metal, it expands. 3.Steel is a mixture of iron and other substancs. 4.Two-thirds of the earths surface is water. 5.The distance of the sun from the earth is 150,500,500kms. 6.The earth si 4.6 billion years old. 7. The earth is forty-nine times larger than the moon.,air-oxygen contract-ex

5、pand earth-sun-moon gas-liquid-solid,Things can be divided into three kinds, natural,man-made,and either natural or man-made.,1. Which of the following are natural?,Electricity,iron,some metals and air are natural.,2. Which are man-made?,Steel,some metals and glass are man-made.,3. Which can be both

6、?,Electricity and some metals (alloys for example),Homework,完成导学案 背诵单词：liquid, expand, contract,substance, mixture,oxygen, electricity,conclusion, potassium,sodium,calcium,aluminium,zinc, rust,boil,Step I Pre-reading Put these words in the correct order to describe the stages of a scientific experim

7、ent.conclusion aim result method,When we do an experiment , we should first of all have an _.We should use proper _.We should find out the _and get a_.,aim,methods,result,conclusion,Scanning: Listen to passage A quickly and choose the best title for it. The Different Uses of Metals The Reaction of M

8、etals The Reaction of Metals with Oxygen,Passage A,Careful Reading ;Read passage A carefully and answer:,1. Which of the metals in the table reacts the most with oxygen and water? 2. What happens when you heat calcium in oxygen? 3. Which metals react with steam? 4. Does iron have a slow or fast reac

9、tion with steam? 5. Does copper react with water?,Potassium, calcium and sodium.,It burns to form an oxide.,Magnesium, aluminium and zinc.,It has a slow reaction.,No, it doesnt.,Passage B :Some important words about the experiment:,apparatus (仪器,设备) holder (台、架等)支持物, 固定器 cotton wool 棉絮 bunsen burner

10、本生灯（煤气喷灯）,- nails,- nails,- nails,- nails,- nails,- nails,_,_,_,_,_,_,_,_,cotton wool,cotton wool,Iron doesnt rust,Oil layer,water,Oil layer,water,Iron doesnt rust,water,water,Iron rusts,Consolidation 1 Answer these questions in groups of four. 1) In the first part of the experiment, what is the use

11、 of the cotton wool in the test tube? 2.) In the second part ,what is there on the surface of the water in the test tube? 3) What is the use of the oil? 4) Why are the nails in the test tube with ordinary water rusty?,There is oil on the surface of the water in this test tube.,The oil can keep air o

12、ut of water.,The cotton wool can keep air dry.,Iron reacts with oxygen in ordinary water and forms rust.,Steps of the experiment report:,Aim Method Result Conclusion,Lets do a simple experiment to test if magnesium can burn in the air and write a short report:,Magnesium can burn in the air,Lets do a

13、 simple experiment to test if magnesium can burn in the air and write a short report:,Aim: Methods: Result: Conclusion:,To find out if Magnesium burns in the air,1)use a pair of tongs to pick up some magnesium 2)light it,Magnesium is burning with a bright flame in the air,Magnesium can burn in the a

14、ir,Language points In the Passage A and Passage B:,4.Did they do this a long time age? No,they didnt,【原句呈现】 1.It is hard to think of a world without metals.,.think of :,“想象”;(here),“想出（主意,办法等)”,2. The reaction of metals with these substances can be put in order., put in order,“把按顺序摆放/排列”,e.g. Please

15、 put these books in order.,4.Did they do this a long time age? No,they didnt, keep out of,3.Add some oil to the water .This will keep air out of the water .,“ 使不进入”； “ 防止进入”,防止空气入水,4. at the top of 在的顶部 at the bottom of 在的底部,5. Half-fill a test tube with water .,“在试管儿里加一半水。”, fill with “ 往里加 /充满 hal

16、f-fill with “ 往加一半的.,Homework:,bye-bye,Everyday English(P48) Vocabulary And Speaking(P42) Look at the decimals( 小数 )(P46) Do the exercise(5): (P46) Preview the words in Module 6,Read the passage again and complete the sentences.(Homework 4):,1. In the first part of the experiment, the _ is dry, not wet. 2. It shows that iron _ when the air is dry.,air,does not rust,3. In the second part of the experiment, you must _ the water to make sure there is no _ in it. 4.