高二英语上册unit13教案

课题SEFCB2Unit13 The water planet课时7 授课日期 3.8 - 3. 16教学目标1. Talk about water and the ocean2. Practice making suggestions and expressing opinions3. Review Modal Verbs4. Write an explanation paragraph教学重难点1. Some important words and expressions2. Learn to make suggestions and express opinions3. Grammar Modal Verbs教学用具1. a recorder2. a blackboard 3. the multimedia4. something special for the experiments (eg. Oil, water, glass, ice cube)背景知识： Water PollutionWhat is necessary to life on earth. All organisms contain it; some live in it; some drink it. Plants and animals require water that is moderately pure, and they cannot survive if their water is loaded with toxic chemicals or harmful microorganisms. If severe, water pollution can kill large numbers of fish, birds, and other animals, in some cases killing all members of a species in an affected area. Pollution makes streams, lakes, and coastal waters unpleasant to look at, to smell, and to swim in. Fish and shellfish harvested from polluted waters may be unsafe to eat. People who ingest polluted water can become ill, and, with prolonged exposure, may develop cancers or bear children with birth defects. The major water pollutants are chemical, biological, or physical materials that degrade water quality. Pollutants can be classed into eight categoriespetroleum products; pesticides and herbicides; heavy metals; hazardous wastes; excess organic matter; sediment; infectious organisms and thermal pollution- each of which presents its own set of hazards. Unit13 The water planetThe First Period Warming-up, Listening and SpeakingTeaching Aims:1. Learn and master the new words and the useful expressions of this partWords: cube, sailor, disadvantages, entertainmentPhrases: come up with, happen toUseful expressions: The water is being used to / for We should / could If we we can It would be better 2. Learn something about water by doing experiment.3. Do some listening4. Improve the students speaking ability by talkingTeaching Important Points:1. Make the students be free to talk about water.2. Improve the students listening ability by practice.Teaching Difficult Points:1. How to finish the task of speaking.2. How to improve the students listening ability.Teaching Methods:1. Listening-and-answering activity to help the students go through with the listening material.2. Individual, pair or group work to make every student work in class.Teaching Aids:1. the multimedia2. the blackboard3. an empty glass, a bottle of water and a bottle of vegetable oilTeaching Procedures:I. Greetings and lead-in1. I have a riddle. Please guess it.Its very important to all the animals and plants.Its also important to human beings.Its liquid at room temperature.Every day you keep in touch with it.You cant live without it. (a thing)Its water. Today we will talk about water. 2. What you know about water? Maybe you can learn more about water from the following experiments.II. Listening1. You can listen to the famous poems about life on the ocean. Before you listen, lets learn two phrases first.1. happen to eg. What happened to you last week? If anything happens to the machine, please tell me.2. come up witheg. I hope you can come up with a better plan than this.2. Play the tape for the first time to get the general meaning and write down some key words.3. Play it for the second time, pause for students to write down the information.4. Check the answersIII. SpeakingIn our daily life, water can be used in different ways. Now well talk about the ways in which water can be used. Look at the pictures on Page 18. You can choose one of the six pictures to discuss the importance of using and protecting our water. When you discuss, you may use the questions to help you.1. How is the water being used?2. Is this a good way to use water?3. Why do we use water in this way?4. Who benefits from using water in this way?5. What are some disadvantages of using water in this way?IV. Summary Today, were mainly learned something about water by doing experiments, speaking and listening. Besides, weve learnt some new words and phrases. After class, try to remember them and preview the next part - reading part.V. Homework必做作业1. 语音知识1. counterA. shoulderB. doubleC. fountainD. obviously2. featherA. theoryB. thirstyC. gatherD. birth3. combA. burstB. debtC. bucketD. board4. ashamed A. discussedB. agreedC. expectedD. needed5. uselessA. oppositeB. desertC. scoldD. reuse2. 补全对话(Bruce and Zhou Lan are talking on the telephone about stamps.)B: Hello. Can I speak to Zhou Lan, please?Z: This is Zhou Lan speaking.B: Hello, Zhou Lan. This is Bruce. Excuse me for ringing you so late in the evening, but Ive just got home.Z: _1_.B: I would like to ask you about some stamps. _2_ You had it when I last saw you.Z: Im afraid I dont have it. I sold it last week.B: _3_.Z: Im sorry. I didnt know you wanted it. What a shame!B: It doesnt matter. I only decided to buy it today. Its a pity I didnt think of it earlier.Z: _4_.B: Yes, please. That would be so kind of you. Ive been working so hard recently that I havent had any time for collecting new stamps.Z: _5_.B: Thanks very much! Bye!Z: Good-bye!A. Ok. Ill ring you if I have any new.B. Do you still have the cock year stamp?C. Can I take a message for you?D. Oh! What a pity!E. Can I help you?F. Do you want me to find one for you?G. Thats OK.EBDFA选作作业： 倍速The Second Period Pre-reading, reading and post-readingTeaching Aims:1. Learn and master the following words and phrases:Words: cube, property, range, medium, relatively, dissolve, pure, relationship, mass, float, absorb, bottomPhrases: all the way, that is, addto, mix with, take advantage of, manage to do2. Improve the students reading ability.3. Enable the students to realize that it is important to protect the water on our planet.Teaching Important Points:1. Improve the students reading ability.2. Master the following phrases: all the way, that is, mix with, take advantage of, manage to doTeaching Difficult Points: How to make the students understand the reading passage better.Teaching Methods:1. Discussion before reading to make the students interested in what they will learn.2. Fast reading to get a general idea of the text.3. Discussion after reading to make students understand what theyve learned better.4. Careful reading to get the detailed information in the text.Teaching Aids:1. the multimedia2. the blackboardTeaching Procedures:I. Greetings and lead-inAs we all know, we cant live without water. But do you know what makes water so important to all the living things? Maybe we can get the answer to the question after reading the article for today. Before you read, first lets learn the new words and phrases in the passage.II. Pre-reading1. Now please look at the titles in the text below. Do not read the whole text. Pick out the topic of each paragraph and use the structures below to make six questions. 1. What is / are the properties of water?2. What does the earth look like?3. What are different parts of the ocean?4. What can the ocean be compared to?5. How does the special air-conditioner - the ocean work?6. What are some examples of species in the ocean?2. The general idea of the text:The passage mainly tells us it is water that makes the ocean so important to all the living things in the world.III. Reading1. Fast readingScan the passage to get some information about water. While you are reading, try to finish the chart in Post-reading on Page 21.PropertyWhat is it?What is it good for?ChemicalstructureEvery water molecule is made up of two hydrogen atoms and one oxygen atom.It is good for the living things in the ocean to absorb the nutrients easily.DensityThe density of pure water is 1000 /, meaning that one cubic meter of water weighs one thousand kilogram.It is good or marine organisms to take advantage of the density of water.HeatcapacityHeat capacity is the amount of energy it takes to raise the temperature of a substance one degree centigrade.It is good for earth to keep the temperature steady. 2. Carefully reading Read the passage carefully and find out the answers to the questions we wrote in the pre-reading activity.(1) The properties of water are chemical structure, salinity density, heat capacity and ocean motion.(2) The earth looks like an ocean planet.(3) There is not any information about the different parts of the ocean.(4) The ocean can be compared to a great place to live in.(5) Because the ocean can keep the temperature of the earth steady, some students compare the ocean to a special air-conditioning. I think the ocean keeps the temperature of the earth steady by absorbing and releasing heat.(6) Plankton, sharks and whales are examples of species in the ocean.IV. Listening and Reading aloud The teacher plays the tape for the students to listen. After listening, the teacher goes among the students and corrects any mistake the students make in pronunciation, stress and intonation.V. Summary Today, we have read a passage about water. As we know, it is very important to all the living things. So we should do all we can to protect water from being polluted. In addition, try your best to retell the passage in your own words.VI. Homework必做作业：佳句摘抄：（根据下列句子的汉语意思，写出对应的英语，与原文一致） 选做作业： 倍速 The Third Period Language PointsTeaching Aims:1. Review the important usages of some words2. Explain the usage of new words mentioned in last classTeaching Important Points:1. Make students understand the meaning and usage of some important words and phrases.2. Master the correct sentence patternsTeaching Difficult Points: How to make the students use the words and phrases correctly in certain situations.Teaching Methods:1. Teachers explanation2. Pair or group work to practice the usageTeaching Aids:1. the multimedia2. the blackboardTeaching Procedures:I. Greetings and lead-inII. Language PointsPart 1. Warming-up1. Cover a glass of water with a piece of thick paper. 用一张厚纸盖在一杯水上。（1）cover用作可数名词，意为封面或盖子。The book needs a new cover. 这本书需要装个新封面。Whats on the front cover? 封面上有什么内容？（2）cover用作及物动词，后跟名词或代词作宾语，其过去分词常用作表语，用于be covered with/by结构，表示被覆盖。（用东西）覆盖 She covered the table with a cloth.占（多大面积） The school covers 2,000 mu.涉及，包含 The book covers a wide field.采访，报道 Im covering the election campaign.够付（费用） Two hundred dollars can cover her need every month.2. Put one hand on the paper and turn the glass upside down. 把一只手放在纸上，然后把玻璃杯翻转。句中upside down是固定短语，常与动词turn构成动词短语。表示颠倒、倒置或倒转。Be careful not to turn the table upside down. 当心别把桌子弄翻了。表示混乱或乱七八糟。They turned everything in the room upside down and ran away.他们把室内的一切弄得乱七八糟然后一跑了之。词组：turn against 背叛 He turned against his country.turn to 向求助 I turned to him for advice.turn up 出现；到；调高 He turns up late for everything.turn out 结果是 Everything turned out well.3. Pour water and vegetable oil into a glass.（1）流 Blood poured from the wound.（2）（人）蜂拥 Workers poured out of the factories.（3）（雨）倾盆而下 The rain is really pouring down.（4）倾注 He has been pouring money into the film for years but its still in trouble.4. Put an ice cube in each glass.I gave the boy a sugar cube. 块The cube of 3 is 27. （3 cubed is 27.） 立方Part 2. Listening 5. Work with a partner and see if you can come up with a good, scary story like the one about the mariner. 你与搭档一起看是否能找到像关于这个水手那样的好的恐怖故事。come up with属于动词+副词+介词结构，主要有两个用法：表示追及或赶上，相当于catch up with。He has made up his mind to come up with his classmates.他已下定决心，要赶上他的同学。表示提出、提供、产生或发现（解决办法、答案等），等于produce。The airline has come up with a solution to the problem. 航空公司想出办法来解决这个问题。词组：come up to来到跟前；往上达到高度Soon the waiter came up to him and asked, Can I help you, sir?The water came up to my waist. come about 发生 Tell me how the accident came about?come across 偶然遇到 I came across his name on the e down （物价）跌落；（风俗，习惯）传下来 Price didnt come e on 进展 How are you coming on with your English?come out 出版；结果是 The book came out last year.How come? 为何会? How come she hates birds?Part 3. Speaking6. Why do we use water in this way?词组：give way to 屈从，让步 The company gave way to the workers demand.in no way 绝不 The two incidents are in no way connected.make ones way 前进，行走 They made their way across the river.on ones way 在途中；渐趋于 He is on the way to recovery.in a way 在某种程度上 You are correct in a way.7. Who benefits from using water in this way? vt. 获益，对有利Exercise benefits our health. 运动有益于我们的健康。Your advice benefited me a great deal. 你的建议对我很有好处。vi. 获益；得益于 接介词from/byWe benefit from daily exercises. 每天做操对我们有益。I benefited enormously from my fathers advice.n. 利益；益处be of benefit to 对有裨益 Eg. Your advice was of great benefit to me.for the benefit of 为了的利益Eg. I get a lot of benefit from learning a foreign language.That experience was of great benefit to me. Eg. We must make efforts to take exercise for the benefit of our health.Part 4 Reading8. the properties of water（1） C 特性，性质Many plants have medicinal properties.（2） U 财产The jewels were her personal property.That car is my property; you cant use it without my permission.（3） U 房地产，不动产Tianjin is developing and property in the center is becoming more valuable.（4） C （一处）房地产He has a property in the west.9. Marine life is incredibly rich and varied. 海洋中的生物极其丰富多彩。varied是形容词，意为各种各样的、多变化的、不相同的、改变了的、杂色的或斑驳的。Almost no one knows his varied life. 几乎没有人知道他多变的经历。Varied opinions made him hard to make a decision. 各种不同的意见使得他难于做出决定。vary v.改变；变化Opinions varies on that point. 在那一点上意见各不相同。variety n.变化性；多样；变种；变形；若干不同的事物Life is full of variety. 生活充满了变化。Last week we went to a variety show. 上星期我们去看了杂耍演出。词组：a variety of 种种We have a variety of colours and patterns to choose from.我们有许多颜色和图案可供选择。He failed in the experiment for a variety of reasons. 因为各种原因，他实验失败了。10. Life in the oceans ranges from the tiniest plankton all the way up to giants like sharks and whales.Range vt.排列；归类；常与on, in, along等介词连用，表示方向或趋势。eg. I ranged the books on the shelf according to size.我把书依大小顺序排在书架上。vi.在范围内变动；eg. The road ranges westward from the road. 这条湖由湖边向西延伸。n.范围（认知、知识、经验或能力方面）不可数名词词组：be out of ones range 某人所不能及的变化（范围）eg. What is the range of this telescope? 这架望远镜的有效距离是多大？have rages of 山脉；延展的一组或一系列eg. The library has ranges of books in perfect order. 这个图书馆的书一排一排放得井井有条。range from（1）从分布到There are two hundred boys ranging from seven to fourteen in age.（2）在某一特定的范围内变化The plant ranges from Canada to Mexico.The temperature ranges from ten to thirty degrees.all the way（自始至终）一直，一路上，从远道而来The target is getting all the way up.Its kind of you to come all the way to see me.up to （1）be up to sth: occupied or busy with sth.忙于What is he up to now?What have you been up to lately?（2）be up to sb. 应由某人负责Its up to you to choose where we should go.（3）be up to + n. 胜任；适于He is not up to his work.The product is up to standard.11. The chemical structure of water makes it an excellent medium for life.水的化学结构使它成为生命的最佳媒介。(1)句中it是人称代词，指代water，而不是代指the chemical structure of water。(2)medium的用法medium是可数名词，复数形式为mediums或media，意为媒体或媒介。Newspapers and magazines are important media for advertising.报纸和杂志为广告的重要媒体。medium也可以用作形容词，意为中间的或中等的。The boy is of medium height for his age. 这男孩的身高在他这个年龄中算中等。12. Because water is polar, it can break down, or dissolve, both solids and gases. 破坏 The police broke the door down. 制服 The police tried to break down the prisoners opposition. 机器损坏 The car broke down.（身体）垮了 His health broke down because he had been working too hard. 崩溃，瓦解；破裂 Talks between the two sides have broken down.She broke down when she heard her husband had been shot. 起化学变化Chemicals in the body break down our food into useful substances.词组：break up 一般指物理变化The ice of the river begins to break up at the beginning of March. 分解 A bicycle can be broken down into hundreds of parts.13. The water molecule is made up of two hydrogen atoms and one oxygen atom.水分子是由两个氢原子和一个氧原子组成。be made up of的用法be made up of意为由组成或由构成。Our class is made up of 50 students. 我们班级由50名学生组成。The medical team is made up of 5 doctors and 8 nurses.医疗队由五位医生和八位护士构成。辨析be made up of，be made of与be made frombe made up of意为由组成或由构成，强调整体由几部分组成。Our class is made up of sixty students. 我们班由六十名学生组成。be made of和be made from均可表示由制成。be made of表示原材料经过物理变化，制成物品不改变本质，还可看出原材料的模样。Desks and chairs are made of wood. 桌椅是用木头制造的。be made from表示原材料经过化学变化，制成的物品改变了本质，已看不出原材料的模样。Paper is made from wood. 纸是用木头制造的。难点在主动语态中，make常与out of或into构成，而不与of或from搭配。Bottles are made of glass. 瓶子是用玻璃制成的。They make bottles out of glass. 他们用玻璃制造瓶子。They make glass into bottles. 他们把玻璃制成瓶子。词组make up组成；构成；虚构；化妆；弥补The workers and peasants make up the majority of the population of our country.我国人口中的大多数是工人和农民。He is expert at making up stories. 他是编故事的行家。I must make up the lessons Ive missed. 我一定要把所缺的课补上。14. The chemical structure of water also makes it different from almost all other substances on earth.