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2019-2020年高一英語下冊 Unit16 Scientists at work(第二課時(shí))教案 大綱人教版第一冊 Teaching Aims: 1.Learn and master the following: Words:conduct,charge,shock,prove,work,tear,fasten,explain,appear Phrases:do an experiment,a great deal of,tie…to… stop…from… Sentence Pattern: Having realised that I could use…,I decided to do an… 2.Read the passage and learn how the scientist Franklin found lightning and electricity are the same. 3.Improve the students reading ability through reading activities. Teaching Important Points: 1.Learn the words and phrases listed above. 2.Train the students to improve their reading prehension. Teaching Difficult Points: 1.Understand the following sentences correctly: (1)Having realised that I could use a kite to attract lightning,I decided to do an experiment. (2)Fly the kite when a thunderstorm appears to be ing on. 2.How to help the students understand the passage better. Teaching Methods: 1.Question-and-answer method to make students interested in what they will learn. 2.Fast reading to get the general idea of the text. 3.Careful reading to answer some detailed questions. 4.Individual,pair or group work to make every student work in class. Teaching Aids: 1.a tape recorder 2.a projector and a puter for multimedia use Teaching Procedures: Step Ⅰ.Greetings Greet the whole class as usual. Step Ⅱ.Revision T:In the last period,we talked about advantages and disadvantages of some discoveries.And I asked you to make up a dialogue with the information of one discovery.Now Ill ask two students to act out the dialogue in front of the class.Any volunteers? S1:… S2… Step Ⅲ.Discussion T:(Show a picture of a telephone on the screen.) Please look at the picture on the screen.Whats it? Ss:Its a telephone set. T:Do you know who invented the telephone? S3:Yes,I know.It was Alexander Bell who invented the telephone. T:You are right.Bell was a great inventor in America.In 1876,he invented the telephone. After 4 years,he invented photophone again. There are many famous scientists like him all over the world.They made many important inventions in many fields.Do you know the names of some famous scientists?What are they famous for?Any volunteers? S1:Edison.He was a great inventor.He invented the electric bulb,the phonograph and many other things. S2:Calilean.He made on astronomical telescope and first began to do a scientific experiment. S3:Harvey.He was a founder of experimental bionomy in modern times. S4:Einstein.He was famous for his theory of relativity. S5:… T:Yes.You are right.In the eighteenth and nineteenth centuries,scientists all over the world also made many important discoveries in many different fields,such as in physics,medicine,chemistry and biology.Can you name some of them?Why are their discoveries important?Now please discuss the questions in groups of four and write down your answers on a piece of paper,then Ill check the answers. (Teacher gives them some minutes to discuss and then collects the students idea.) Suggested answers: S6:Newtons.He was the famous physicist and mathematician in the history of science.Also he made a telescope.He found the law of universal gravitation and Newton Law.Without Newton Law there wouldnt be modern physics. S7:Marie Curie.She was an extraordinary woman scientist.She found radium and uranium.She made a great contribution in physics.If there were no radium and no uranium,we couldnt take x-ray photos,which are very helpful to modern medicine. S8:Darwin.He was the founder of the theory of evolution.His theory makes us know the origin of human and the development of human better.His theory is very important to the development of biology. S9:Nobel.He was the inventor of the detonator and set up“Nobel Prize”.His invention made it safer for humans to use explosive.His Nobel prize encourages more people to make more contributions to the world. S10:… Step Ⅳ.Pre-reading T:Well done.You have known much about some famous scientists and their important discoveries. Do you know something about Franklin? S11:Yes.Franklin was a Northern American scientist and discovered the secret of lightning. T:Very good.How did he discover the secret? He did it through a famous kite experiment. Today well read a passage to know about his experiment.Before reading it,well learn the new words first.Please look at the screen.Lets read the words together. (Teacher shows the new words on the screen.) New words: conduct vt.引導(dǎo)；管理；指揮n.行為；操行 conductor n. charge vt.充電 prove vt.證明；證實(shí) tear vt.(tore,torn)撕扯；撕裂；撕毀 fasten vt.扎牢；拴緊；使固定 explain vt.解釋；說明　explanation n. shock vt.打擊；震動(dòng) thunderstorm n.雷暴 condenser n.冷凝器；電容器 string n.線；細(xì)繩 handkerchief n.手帕 frame n.結(jié)構(gòu)；框架 foot n.英尺；腳 feetl (pl.)n. ribbon n.緞帶；絲帶 electric adj.電的 electricity n. sharp adj.銳利的；鋒利的 (Teacher corrects the students mistakes in pronunciation,gives simple explanation and gets the students to have enough time to remember the new words.) Step Ⅴ.Reading T:Now open your books on Page 18.Read the passage quickly and answer the two questions on the screen. (Teacher shows the questions on the screen.) 1.Was the experiment done in June 1752 successful? 2.What did this experiment prove? (Teacher gives students a few minutes to read the passage and then check the answers.) T:Have you finished reading?(Ss:Yes.)Who knows the answer to the first question? S11:Yes,the experiment was successful. T:Whod like to answer the second question? S12:This experiment proved that lighting and electricity were the same. T:OK.Now read the passage carefully.After a while,Ill give you some sentences on the screen.Read them and tell us if they are true or false. (After a few minutes,teacher shows the sentences on the screen and corrects the students answers.) 1.In 1752,scientists already know what electricity is. 2.Franklin was helped by a friend to do the experiment. 3.Franklin made the kite of silk because wet silk doesnt conduct electricity. 4.A condenser was used in the experiment to store electricity. 5.The key tied to the string was put into the door to stop the kite from flying away. Suggested answers: True:1、4　False:2、3、5 T:Your answers are right.Now look at the pictures on Page 19 in your books.The pictures show how Franklin did his experiment.Please pick out the correct ones.If you have any difficulty,you may discuss them in pairs. (Two minutes later,teacher asks students to give the answers.) S13:I think Picture 2、3、4 are correct. S14:I think Picture 2 is wrong.After Franklin and his son flied the kite,they stood inside a door or under some cover so that the silk ribbon does not get wet. T:Student 14 is right.The correct pictures are Picture 3 and 4. Step Ⅵ.Language Study T:We have known the general meaning of the passage.In the text there are some sentences we should master.And there are some words and expressions we should learn to use.Lets look at their usages on the screen. 1.do/carry out/make/perform an experiment e.g.They did an experiment on the monkey to test the new drug. 2.a great deal of +(u.)n. A great deal of money has been spent on the new hospital. 3.prove+n./pron./that… prove sb./sth. (to be)+n./adj. It is proved that… e.g.Who can prove it? The facts prove that he is right. =He proves(to be)right. =It is proved that he is right. She proved a very strict teacher. 4.charge vt. The cell phone is being charged. 5.cross n./vt. He marked the wrongly spelt word with a cross. He crossed the river. 6.appear vi.=seem It appears/appeared that… appear+adj. e.g.It appears that I am wrong I appear(to be)wrong. He appears to be talking to himself. John appeared to have known that. 7.tie…to… Please tie the horse to the tree. 8.stop sb.(from)doing sth. What can stop us from doing so if we want to? 9.work vi. The drug will not work. I think your suggestion will work. 10.Having done…,主+v… Not having received his letter,I decided to write one again. T:(Teacher gives some explanations to those on the screen.)In the last sentence,the Perfect Present Participle is used because“receive”happened before“decide”.(Write some important words,phrases on the blackboard.) Step Ⅶ.Listening and Consolidation T:Now look at your books.Ill play the tape. You can follow it in a low voice.Do pay attention to your pronunciation and intonation. (After that,teacher gives students a few minutes to read the text aloud.) T:So much for reading the text.Now look at the three questions behind the text.Discuss them in groups of four.After a while,Ill ask some of you to talk about your ideas. (Students begin to discuss and then teacher collects the ideas.) Suggested answers: 1.Because the kite could fly high enough to get close to the thunderstorm so that he could do his experiment. 2.Because the kite made of paper isnt strong enough,while a kite made of silk will last longer in the stormy weather. 3.I think it was dangerous.Because they might be killed by electricity,which was conducted by the string. Step Ⅷ.Summary and Homework T:Today weve read a passage about Franklin. Weve known that he was a great scientist and that he proved the lightning and electricity were the same.At the same time,Weve also learned some useful expressions and sentence patterns.After class,read the passage again and retell it.Then describe a simple experiment.If time permits,you should read something about Franklin to know more about him. Step Ⅸ.The Design of the Writing on the Blackboard Unit 16 Scientists at work The Second Period Verbs: 1.prove+n./pron./that… prove sb./sth(to be)+n./adj. It is proved that… 2.appear(=seem).It appears/appeared that… appear+adj. Phrases: 1.do/carry out/perform/make an experiment 2.a great deal of +(u.)n. 3.tie…to… 4.stop…(from) doing… Sentence Pattern: Having done…,主+v… Step Ⅹ.Record after Teaching _____________________________________ _____________________________________ _____________________________________ _____________________________________