unit global warming ReadingPPT课件

Unit 4 Global warmingReading高二人教新课标版选修六高二人教新课标版选修六第1页/共84页Pre-reading第2页/共84页第3页/共84页第4页/共84页1. Have you ever seen a greenhouse?is made of glass used for growing plants, especially during cold weather.第5页/共84页2. How does the greenhouse work?第6页/共84页The air inside was warm because the glass traps(挡住, 吸收) the heat from the sun and keeps it from escaping(逃跑). This makes the greenhouse heat up(热量上升) and so the plants can grow throughout(在期间) the cold period.第7页/共84页3. What are Greenhouse Gases?Methane4Ozone51Carbon dioxide2Water vapor1 1Nitrous oxide3第8页/共84页4. Greenhouse EffectGlobal warmingGreenhouse gases trapped the heat from the sun, which causes the temperature of earth goes up. 第9页/共84页Greenhouse effect第10页/共84页Green house effect第11页/共84页第12页/共84页THE EARTH IS BECOMING WARMER BUT DOES IT MATTER? Reading第13页/共84页 1) How many paragraphs does the reading 2) Make a division of the text.Read the passage quickly (3)text consist of? Please number them.Fast-Reading第14页/共84页Main ideas of each part:Introduce a debate over the issue of global warming. raising a questionHow global warming comes about.giving examples,using graphs, explanation 第15页/共84页List two different attitudes among scientists towards global warming.Its up to readers to think and decide whether people should do something about global warming or not.giving examples, making contrastleaving a question第16页/共84页Are the risks too great?So can you predict the future of the global warming? 第17页/共84页 Who writes this article?Sophie Armstrong of Earth CareWhat rose about one degree Fahrenheit?The temperature of the earthCareful readingIntroduction of global warming. 第18页/共84页2. _1. _(2-5)How global warming comes about?the burning of fossil fuels human activityCarbon dioxideMethaneWhat are the Greenhouse gases?1.2.3.Water vapor第19页/共84页What are the effects of global warming?v a rise in the sea level v Severe storms, droughts, famines, the spread of diseases, and the disappearance of speciesv Make plants grow fastereffects第20页/共84页Read and answer the questions. 1. Who wrote the magazine article? What is the name of the magazine?2. What are the names of the three scientists mentioned in the article?1. Sophie Armstrong, Earth Care.2. Dr Janice Foster, Charles Keeling, George Hambley.第21页/共84页3. What do the three scientists think about global warming? believes it is the burning of more and more fossil fuels that is resulting in a big increase in carbon dioxide.Dr. Janice FosterGeorge HambleyCharles Keelingthinks the effects of globalm warming could be very serious(严重的).thinks global warming will be mild with few bad environmental consequences.第22页/共84页The different ideas between Dr. Janice Foster & George HambleyDr. Janice Foster George HambleyCarbon dioxide has caused the global temperature to _. An increase of five degrees would be a _ and could be _.More carbon dioxide is a _ thing,which makes crops _ more and will encourage _.go upcatastrophevery seriouspositiveproducea greater range of animals第23页/共84页4. What are the two graphs about?The first graph shows the temperature increase of one degree Fahrenheit between 1860 to 2000. The second graph shows the carbon dioxide content in the atmosphere from 1957 to 1997.第24页/共84页from around 315 parts per million to around 370 parts per millionHuge quantities of extra carbon dioxideFrom 1957 to 19975. What is the main topic of the article?Global warming/ the warming of the earth.第25页/共84页1. Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977? A. Dr. Janice Foster. B. Charles Keeling. C. George Hambley. D. Sophie Armstrong.BChoose the best answer. 第26页/共84页2. Which of the following is Dr Janice Fosters opinion? A. The result of the temperature increase will be serious. B. The amount of warming is nothing serious. C. We neednt worry about high levels of carbon dioxide. D. Global warming is a natural phenomenon.A第27页/共84页3. Which of the following is TRUE according to the text? A. The temperature of the earth increased about one degree Fahrenheit during the 20th century. B. The carbon dioxide content in the air increased by 70 parts per million from 1957 to 1997. C. All scientists accept the data in graph 2 except Charles Keeling. D. Janice Foster says that more carbon dioxide will make plants grow faster.A第28页/共84页4. The author probably agrees that _A. actually global warming is good for man.B. we should do nothing about the global warming.C. catastrophes will happen if the globe keeps on warming.D. a lot remains to be found out about the effects of global warming.D第29页/共84页True or false?1. The temperature in the last century did not seem to increase much. 2. Everyone believes that global warming is caused by the activities of humans.3. Janice Foster believes that she can measure the future global rise in temperature.TTF第30页/共84页4. The rise in carbon dioxide is causing a steady increase in global warming. 5. George Hambley believes that global warming will do good rather than harm to the earth.6. It is clear what the effects of global warming will be.TTF第31页/共84页SummaryTry to talk in general terms rather than in details.e.g: I learnt that the earth is becoming warmer. I learnt that global warming could have terrible effects on the environment. 第32页/共84页A : We shall do something about global warming.B: We shall do nothing about global warming.Debate第33页/共84页What we should do to protect our earth?Discussion:第34页/共84页1. Reduce the burning of fossil fuels 2. Plant trees 3. Use bags that can be recycled 第35页/共84页1. It is a rapid increase when compared to other natural changes. compare vt. 1)比较; 对照 comparewith表示“把与相比(同类相比)” 如： Compare your answers with those at the back of the book to see if they are right. 把你的答案同书后面的答案对照一下, 看看是否正确。 Language points 第36页/共84页2) 喻为; 比拟compareto 表示“把比做(异类相比, 比喻)” 如： Mans life is often compared do a candle.人生常被比为蜡烛。My handwriting can not be compared with my fathers.我的书法不能与我父亲的相比。第37页/共84页Shakespeare compared the world to a stage. 莎士比亚把人世比做舞台。知识拓展知识拓展compared to /with 与相比, 一般在句子中作状语。Compared to/with many women, she was indeed very fortunate.第38页/共84页come about: 发生, 造成, 相当于happen你能告诉我事情是怎么发生的吗？ Can you tell me how the accident came 随着电的使用, 种种大变化发生了。With the use of electricity, great changes have come about. come out 出现; 传开; 公开come up 发生、举行; 出现2. So how has this come about and does it matter?第39页/共84页come about 是不及物短语。如：1) Please tell me how the accident _. I am still in the dark. (2005 江西) A. came by B. came out C. came to D. came aboutD第40页/共84页2) Its already 10 oclock. I wonder how it _ that she was two hours late on such a short trip. (湖北2006) A. came over B. came out C. came about D. came up 解析: 已经十点钟了, 我不知道是怎么回事, 这么短的路程她迟到了两个小时。come over 来访come out 出来, 出版come up 出现C第41页/共84页3. There is no doubt that.doubt 1) 作不可数名词作不可数名词, 作作“疑惑疑惑; 怀疑怀疑”肯定句中肯定句中doubt多接多接whether (一般不用一般不用if代替代替) 同位语从句。如同位语从句。如: Theres some doubt _ hell keep his promise. 他会不会信守诺言还难说。他会不会信守诺言还难说。 She had her doubts _ the new book would sell well. 她怀疑新书是否会畅销。她怀疑新书是否会畅销。whetherwhether第42页/共84页否定句中否定句中doubt多接多接that同位语从句。如同位语从句。如: There is no doubt _ they will ask you for help. 毫无疑问毫无疑问, 他们会请你帮忙的。他们会请你帮忙的。 I have no doubt _ you will succeed. 我毫不怀疑你会成功的。我毫不怀疑你会成功的。2)作及物动词常用于下列句型中作及物动词常用于下列句型中, 作作“怀疑怀疑;不能肯定不能肯定; 不大相信不大相信”解解, 一般不用进行时态。一般不用进行时态。thatthat第43页/共84页用于否定句或疑问句用于否定句或疑问句, 后接后接that引导的宾语引导的宾语从句。如从句。如: I dont doubt _ he is telling the truth. 我毫不怀疑他在讲真话。我毫不怀疑他在讲真话。 Do you doubt _ he will win the match? 你怀疑他会赢这场比赛吗你怀疑他会赢这场比赛吗? 用于肯定句用于肯定句, 一般接一般接whether 或或if引导的宾语引导的宾语从句。从句。 如如: I doubt _ we will make a profit out of it. 我认为我们不可能从此事中获利。我认为我们不可能从此事中获利。 We doubt _ she will be persuaded. 我们不知道她会不会被说服。我们不知道她会不会被说服。 whether/ifwhether/ifthatthat第44页/共84页考点1 There is no doubt that .是固定句型, 意为“毫无疑问”, that引导的是同位语从句，用来进一步补充说明doubt的具体内容。如：Some researchers believe that there is no doubt _ a cure for AIDS will be found. (广东2005)A. which B. that C. what D. whetherB第45页/共84页考点2 it is . that .构成强调句型, 强调的是主语human activity。强调句型可强调主语、宾语或状语。如：It is not who is right but what is right _ is of importance. (重庆2007)A. which B. itC. that D. this 解析: 将it is和that去掉后, 此句成为Not who is right but what is right is of importance, 句子完整, 故此题是一个强调句型。B第46页/共84页I dont mind her criticizing me, but _ is how she does it that I object to. (江西2007)A. itB. thatC. this D. which 解析:去掉it is和that后, 本句相当于., but I object to how she does it, 是个完整的句子。故此句是it强调句型, 被强调部分是宾语从句。A第47页/共84页4. phenomenon n. 现象现象; 奇迹奇迹; 罕见的人才罕见的人才或事物或事物eg: 雨雪是天气现象。雨雪是天气现象。Rain and snow are phenomena of the weather.eg: 不应该简单地视未婚妈妈为一种社会现象。不应该简单地视未婚妈妈为一种社会现象。Unmarried mothers should not be regarded simply _.eg: 贝多芬是音乐家中的天才。贝多芬是音乐家中的天才。Beethoven was _ among musicians.pl. phenomena as a social phenomenona phenomenon第48页/共84页5. subscribe to1) 同意同意; 支持支持I dont subscribe to such views. 我不同意这样的观点。我不同意这样的观点。 2) 对对.捐款捐款Many people subscribed liberally to the relief fund. 许多人为救灾基金慷慨解囊。许多人为救灾基金慷慨解囊。 第49页/共84页3) (在文件等下面在文件等下面)签名签名He subscribed his name to a petition.他在请愿书上签名。他在请愿书上签名。4) 订阅订阅(书籍等书籍等)He subscribed to Readers Digest.他订阅他订阅读者文摘读者文摘。第50页/共84页6. Without the green house effect, the earth would be about thirty-three degrees Celsius cooler than it is. 如果没有温室效应如果没有温室效应, 地球会比现在冷地球会比现在冷33。 这是一个含蓄虚拟条件句。这是一个含蓄虚拟条件句。 有时假设的情况并不以条件从句形式表示有时假设的情况并不以条件从句形式表示 出来出来, 而是通过一个介词短语或其他方式而是通过一个介词短语或其他方式 表示。常用的词或短语有表示。常用的词或短语有: without, but for, but that, otherwise, or, but等。等。 第51页/共84页e.g. Without your help ( = If we had not had your help), we could not have succeeded要是没有你的帮助要是没有你的帮助, 我们是不会成功的。我们是不会成功的。He felt very tired yesterday, or he wouldhave attended the party他昨天很累他昨天很累, 不然他就参加那个聚会了。不然他就参加那个聚会了。第52页/共84页But for electricity (= If there were no electricity), there would be no modem industry 要是没有电要是没有电, 就不会有现代工业。就不会有现代工业。He was having a meeting with his students, otherwise he would have come. 他当时正与他的学生进行讨论他当时正与他的学生进行讨论, 否则否则的话他就来帮我们了。的话他就来帮我们了。 第53页/共84页7. quantity n. 数量数量; 量量“a large/small quantity of +不可数名词不可数名词和可数名词复数和可数名词复数”表示表示“大量的大量的/少量的少量的”, 也可以用也可以用“large/small quantities of +不可数名词或可数名词复数不可数名词或可数名词复数”来表达。来表达。用法归纳用法归纳: a quantity of 大量的大量的quantities of 大量的大量的There is a small quantity of water left in the bottle. 瓶子里还剩下少量的水。瓶子里还剩下少量的水。She has quantities of good clothes.她有许多好衣服。她有许多好衣服。 第54页/共84页特别提示特别提示a quantity of 后可接不可数名词或后可接不可数名词或可数名词的复数形式。当它修饰名词可数名词的复数形式。当它修饰名词作主语时作主语时, 谓语名词用单数谓语名词用单数; 而而quantities of后同样可接不可数名词后同样可接不可数名词或可数名词的复数形式或可数名词的复数形式, 但谓语用复数。但谓语用复数。amounts of + 不可数名词充当句子不可数名词充当句子的主语时的主语时, 其谓语动词用复数。其谓语动词用复数。第55页/共84页8. go up 1) 上升上升Prices have gone up again. 物价又上涨了。物价又上涨了。 2) 被建造起来被建造起来New factories are going up everywhere. 到处在兴建新工厂。到处在兴建新工厂。 3) 被焚毁被焚毁The whole building went up in flames. 整幢楼被焚毁了。整幢楼被焚毁了。 第56页/共84页9. It was a scientist called Charles Keeling who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997. 是一位名叫查尔斯奎林的科学家把1957至1997年期间大气层中二氧化碳的含量作了精确的统计。解析: 该句是一个强调句。第57页/共84页amount of 习惯用语习惯用语:an amount of 相当数量的相当数量的; 一些一些any amount (of) 任何数量任何数量(的的); 大量大量(的的)be of little amount 不重要不重要; 无价值无价值 amount n. 数量数量 large amounts of money 大量的金钱大量的金钱 In an invoice the amount of money should be written both in words and in figures.发票上的钱数要用字和数码写出来。发票上的钱数要用字和数码写出来。第58页/共84页10. result in 结果结果; 致使致使; 导致导致主语主语: in 的宾语的宾语:起因起因结果结果Acting before thinking always results _ failure.做事不先考虑总会导致失败。做事不先考虑总会导致失败。The accident resulted _ the death of two people.这场意外事故造成两人死亡。这场意外事故造成两人死亡。inin第59页/共84页result from 起于起于, 由于由于, 由由引起引起主语：主语： from 的宾语：的宾语：His sickness resulted _ eating too much. 起因起因结果结果from第60页/共84页causebring about lead to1)cause 表示的因果关系比较直接表示的因果关系比较直接Smoking can cause lung cancer.My car has caused me a lot of trouble. 2) bring about 表示的因果关系不那么表示的因果关系不那么直接直接The war brought about a reduction in the birth rate.3) lead to 相当于相当于causeThe strike could lead to a loss of jobs.第61页/共84页11. On the other hand, there are those, like George Hambley, who are opposed to this view, believe that we should not worry about high levels of carbon dioxide in the air.在另一方面, 还有一些人, 对这一观点持反对态度, 像科学家乔治 汉布利, 他们认为我们不必担心空气中高含量的二氧化碳。第62页/共84页分析: 该句是一个主从复合句。主句为there are those, like scientist George Hambley 作句子的插入语, who引导的定语从句修饰those, 且在该定语从句中其谓语动词believe又带有that引导的宾语从句。句子的主要部分可以表示为: . there are those who believe that . 第63页/共84页on the other hand: 另一方面另一方面Id like to eat out, but on the other hand I should be trying to save money.I want to go to the party, but on the other hand I ought to be studying. 我想去参加聚会我想去参加聚会, 但从另一方面来说但从另一方面来说, 我应该留下来学习。我应该留下来学习。第64页/共84页12. oppose vt. 反对反对; 反抗反抗 如：如：I am opposed to going shopping with others.我反对与他人一起外出购物。我反对与他人一起外出购物。He is strongly opposed to the plan.他强烈反对这一计划。他强烈反对这一计划。oppose sth./doing sth. 反对某事反对某事/做某事做某事be opposed to sth./doing sth. 反对某事反对某事/做某事做某事oppose后若接动词后若接动词, 则用其动名词形式，则用其动名词形式，而不用动词不定式。而不用动词不定式。第65页/共84页oppose doing sth.= object to doing sth. 反对做某事反对做某事The young man opposed/objected to turning to his parents for help.这个年轻人反对向他的父母求助。这个年轻人反对向他的父母求助。易混辨析易混辨析oppose (尤指采取行动尤指采取行动)反对反对, 反抗反抗(某事某事)be opposed to 一方面相当于一方面相当于be against“反对反对”; 另一方面相当于另一方面相当于be opposite to“相对相对”。第66页/共84页13. consequence n. 结果, 后果, 影响in consequence 因此as a consequence 结果as a consequence of 由于的结果nIt rained yesterday and in consequence the match was canceled. nHe studied hard, and in consequence he passed the exam.第67页/共84页 +n.14. state +that从句 +wh-从句；他已公开声明他会支持那项政策。他已公开声明他会支持那项政策。He has publicly _ _ _ for the policy.stated his support我听见那位官员说不接纳儿童。我听见那位官员说不接纳儿童。I heard the official state that they would not accept children.合同清楚地叙述了那项工作应在何时完成。合同清楚地叙述了那项工作应在何时完成。The contract stated when the work should be finished.v. 陈述陈述, 声明；声明； n. 状况状况, 情况情况; 国家；国家；第68页/共84页15. range v. 排列排列, 使成行使成行; 偏袒偏袒, 站在站在的方面的方面n. 范围范围(尤指从尤指从到到各种种类各种种类, 可供选择的可供选择的范围等范围等, 可加不定冠词可加不定冠词); 排列排列 beyond the range of 超越超越的范围的范围out of ones range 某人达不到的某人达不到的这家商店商品品种多。这家商店商品品种多。The shop keeps _.常可用于常可用于: 1) 被动结构被动结构 2) range oneself；3) range from to / betweenand 从从到到不等不等a wide range of goods第69页/共84页老师令其学生沿着小径排队。老师令其学生沿着小径排队。The teacher _ along the path.温度在温度在15度到度到35度之间。度之间。The temperature _.我们应当列身于法律与秩序的一边。我们应当列身于法律与秩序的一边。We should _ on the side of law and order.ranged his studentsranges from 15 to 35 degreesrange ourselves第70页/共84页16. even if /though: 即使即使; 虽然虽然He will come on time even though it rains. 即使下雨即使下雨, 他还是会准时来的。他还是会准时来的。 I wouldnt tell you even if I knew. Even if she survives, shell never fully recover.Even though hes 24 now, hes still like a little child.I can still remember, even though it was so long ago.第71页/共84页1. A large q_ of rice is badly needed here.2. Students are from a wide r_ of backgrounds.3. She studied hard, and in c_ she passed the exam.4. The park attracts 4 million visitors p_ year.uantityangeonsequenceerI. 根据句意及所给单词的首字母或汉语 提示, 写出各单词的正确形式。第72页/共84页5. What sort of _ (燃料) do these machines need?6. The _ (数据) is still being analysed. So dont be so worried.7. The earthquake was a terrible _ (大灾难).8. A rainbow is a natural _ (现象) especially after a heavy rain.10. The _ (曲线图) of export indicates a new success of the company.graphfuel data catastrophephenomenon第73页/共84页II. 根据句意, 选择适当的单词或短语填空1. climate; weathera. Its very difficult for her to get used to the dry and cold _ there.b. How we wish the sunny _ could keep up for another several days!2. come about; come acrossa. Ive never _ anyone quite like her before.b. Please tell me how the accident _. I am still in the dark.climateweathercome acrosscame about第74页/共84页3. quantity; quality a. Much of the land was of poor _.b. Buy vegetables in small _, for your immediate use.4. result in; result froma. The accident _ the death of three people.b. His failure _ not working hard enough.qualityquantitiesresulted inresulted from第75页/共84页5. glance; glare; starea. He _ angrily at her across the dinner table.b. She _ at the page for several minutes, trying to understand.c. She _ round the room before she left.glaredstaredglanced第76页/共84页1. It was very late, but they went on working.It was very late, but they _ _ working.2. We dont doubt that he can do a good job._ _ _ _ _ he can do a good job.3. Their carelessness led to the failure.Their carelessness _ _ the failure.kept onThere is no doubt thatresulted inIII. 每空一词, 使两个句子的意思相同。第77页/共84页4. I dont know how the accident happened.I dont know how the accident _ _.5. The factory turns out a large number of paper products.The factory turns out _ _ _ _ paper products.6. Although they raise the price, hes going to buy the farm.Hes going to buy the farm _ _ they raise the price.even if / thoughcame aboutlarge quantities of/ a lot of第78页/共84页IV. 翻译1. 他的粗鲁导致了孩子和他的争吵。 (result in)2. 他们不知道这个变化是怎样产生的。 (come about)They didnt know how the change had come about.His rudeness resulted in the childs quarreling with him.第79页/共84页3. 他以优质的服务使生意逐步兴隆起来。 (build up)4. 邻居们让他们停止制造噪音, 但他们 仍然继续。(keep on)The neighbours asked them to stop making a noise, but they still kept on.He built up his business by good service.第80页/共84页5. 不用担心, 我们已经储藏了很多食物。 (quantities of)6. 那个老人瞥了一下他的手表, 然后看了 看天空。(glance at)The old man glanced at his watch and then looked at the sky.Dont worry. We have stored quantities of food already.第81页/共84页Homework1. Read the passage again and review the new words and expressions.2. Write a passage about global warming.第82页/共84页第83页/共84页感谢您的观看。第84页/共84页