新人教选修六Unit4Globalwarming单元课件.pptx

1、Unit 4Unit 4Global Warming人教新课标选修六人教新课标选修六The effects of global warming Negative effects: 1 cause the sea level to rise; 2 severe storms; 3 droughts; 4 famine; 5 destruction of species 6 floodThe effects of global warming Positive effects: 1 make plants grow faster; 2 crops will produce more; 3 make

2、 life better Energy sources?International relations? Money?Technology? Which is the most important to a country? Man power?energy sources We depend on energy to do many things in our daily lives. For example, energy lights our cities and heats our buildings. Make a list of things that use energy in

3、your home, in your school, or any other places you can think of. stove light things that use energy in your home micro-wave oven cassette player heating television hairdryer video player fridge computer washing machine stoveWind energy is used as power to produce electricity . Windmillswhere electri

4、city is produced by burning coals.The coal power stationsin which oil is refined and made pure. The Oil Refineriesa facility designed to convert nuclear energy into electricity.A nuclear power plant on the roof of a house on a bright sunny day are used to collect solar energy, making your house warm

5、 or heating your water.Solar panelsare used to keep back water and raise its level for irrigation or for producing electricity, etc.The Hydro-electric dams An energy source is “renewable” when supplies of it never run out and “non-renewable” when one day they will run out. Which energy sources on yo

6、ur list are renewable and which are non-renewable? DiscussionCoalOilNatural gasUranium化化铀铀 (nuclear energy)Fossil fuels Non-renewable Wind (wind power) Sun (solar energy) Water (hydro-electric power) Plant waste 植物性废物植物性废物 (biomass energy 生物团能量生物团能量 ) Hot springs or geysers 间歇泉间歇泉 (geothermal energy

7、) The sea (tidal energy 潮汐能潮汐能 )RenewableWhat are fossil fuels? Fossil fuels are Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. They are also known as non-renewable energy because o

8、nce they are run out of /run out, they cannot be renewed.What are these buildings made of and what is their purpose? They are made of glass and plants can grow in it when it is cold outside.How does it work?The glass traps the heat from the sun, making the air warm so that plants can grow better.Gre

9、enhouse gases!Whats greenhouse gases effect?Greenhouse gases perform the same function as the glass in a greenhouse - They trap the heat of the sun and keep the air surrounding the earth warm.It is called the greenhouse effect.The Earth Is The Earth Is Becoming Warmer Becoming Warmer But Does It But

10、 Does It Matter?Matter?Translate the following words into English: Translate the following words into English: Fast ReadingScanning1.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?3.What do they think about globa

11、l warming? Do they agree with one another?4.What are the two graphs about?Sophie Armstrong wrote the magazine article. The name of the magazine is “Earth care”.2.What are the names of the three scientists mentioned in the article?They are Dr. Janice Foster, Charles Keeling and George Hambley.1.Who w

12、rote the magazine article? What is the name of the magazine?3.What do they think about global warming? Do they agree with one another?There are some very different attitudes among scientists towards this issue.Some think the effects will be terrible, while some others believe that we should not worr

13、y about it. 4.What are the two graphs about?Graph 1 shows the temperature increase of one degree Fahrenheit between 1860 to 2000.Graph 2 shows the carbon dioxide content in the atmosphere from 1957 to 1997.Graph 1:Graph 2:A. The earth. B. Global warming. C. Becoming warmer doesnt matter. skimming Sk

14、im the text to get the main idea of the passage and each paragraph, then divide the whole passage into 4 parts and summarise the main idea of each part.Main ideas of each partIntroduce a debate over the issue of global warmingExplanation about how global warming comes about.Two different attitudes a

15、mong scientists towards global warming.Two choices of dealing with this problem.Detailed-Reading Read the article in details and finish the following task. Dr. Janice FosterCarbon dioxide has caused the global temperature to _. An increase of five degrees would be a _ and could be _.go upcatastrophe

16、 very seriousThe different ideas between Dr. Janice Foster & George HambleyGeorge HambleyMore carbon dioxide is a _ thing,which makes crops _ and will encourage _.positiveproducea greater range of animalsSome peopleothersThe sea level _.predict_,_,_,_,_, and _.rise by several metressevere stormsdrou

17、ghtsfamines the spread of diseases Other peoples ideafloodsthe disppearance of species 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

18、 future global rise in temperature.TTF4. 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.TTFA : We shall do something about g

19、lobal warming.B: We shall do nothing about global warming.DebateGlobal warming has attracted the worlds attention, because it affects us and will affect our later generations. Even though we are not sure about the effects of global warming, we should still hope for the best, prepare for the worst.Su

20、mmary 1. matter 要紧、有关系，要紧、有关系，= be importantIt doesnt matter if I miss the train because theres another one in ten minutes.It is what you do rather than what you say that matters. Language points 2. It is a rapid increase when compared to other natural changes. compare vt. 1)比较比较; 对照对照 comparewith表示

21、表示“把把与与相比相比(同类相比同类相比)” 如：如： Compared to/with many women, she was indeed very fortunate.2) 喻为喻为; 比拟比拟compareto 表示表示“把把比做比做(异类异类相比相比, 比喻比喻)” 如：如： My handwriting can not be compared with my fathers.我的书法不能与我父亲的相比。我的书法不能与我父亲的相比。Shakespeare compared the world to a stage. 莎士比亚把人世比做舞台。莎士比亚把人世比做舞台。用法拓展用法拓展(1

22、)compare notes 交换意见交换意见(2)beyond comparison/compare 无与伦比无与伦比(3)compare.to.把把比作比作(4)compare.with.把把和和相比相比Compared with your brother, you should make greater efforts to study English.和你哥哥相比，你应该更加努和你哥哥相比，你应该更加努力学习英语。力学习英语。come about: 发生发生, 造成造成, 相当于相当于happen你能告诉我事情是怎么发生的吗？你能告诉我事情是怎么发生的吗？ Can you tell m

23、e how the accident came about?随着电的使用随着电的使用, 种种大变化发生了。种种大变化发生了。With the use of electricity, great changes have come about. come out 出现出现; 出版出版come up 出现出现; 被提出被提出3. So how has this come about and does it matter?come aboutcome acrosscome roundcome into beingcome into effectcome outcome down to earth发生

24、发生偶然遇到偶然遇到绕道而来绕道而来, 苏醒苏醒出现出现, 形成形成开始生效开始生效出现出现; 出版出版; 显出显出回到现实中来回到现实中来come about 是不及物短语。是不及物短语。 Please tell me how the accident _. I am still in the dark. (2005 江西江西) A. came by B. came out C. came to D. came aboutD4. 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wheth

25、er (一般不用一般不用if代替代替) 同位语从句。同位语从句。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: Theres some doubt _ hell keep his promise. She had her doubt _ the new book would sell well. whetherwhetherThere is no doubt _ they will ask you for help. I have no doubt _ you will succeed. 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

26、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。从句。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 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? I doubt _ we will make a profit o

27、ut 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/ifthatthat4. 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。

28、 3) 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。5. 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

29、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, otherwise, or, but等。等。 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。6. quantit

30、y n. 数量数量; 量量1)“a large/small quantity of +不可数名词不可数名词或可数名词复数或可数名词复数”表示表示“大量的大量的/少量的少量的”, 当它修饰名词作主语时当它修饰名词作主语时, 谓语动词用谓语动词用单数单数2)“large/small quantities of +不可数名词或不可数名词或可数名词复数可数名词复数”,但谓语动词用但谓语动词用复数复数。 Large quantities of cotton have been shipped all over the world already.A large quantity of bamboo is

31、 used for pipes to carry water. 可数名词可数名词和和不可数名词不可数名词均可修饰：均可修饰：lots of = a lot of a quantity of = quantities of a mass of = masses of , plenty of只修饰只修饰可数名词：可数名词：many, a great/large number of = large numbers of, a good/great many, scores of, dozens of只修饰只修饰不可数名词：不可数名词：much, a great/large amount ofa gr

32、eat/good deal of注意：注意：amounts of + 不可数不可数名词充当句子名词充当句子的主语时的主语时, 其谓语动词用其谓语动词用复复数。数。an amount of + 不可数不可数名词充当句子名词充当句子的主语时的主语时,其谓语动词用其谓语动词用单单数。数。 the amount of +不可数名词不可数名词the number of +可数名词可数名词 e.g. What are you going to do with the amount of money?7. It means that more heat energy tends to be trapped

33、in the atmosphere causing the global temperature to go up.二氧化碳量的增加意味着更多的热能滞留在二氧化碳量的增加意味着更多的热能滞留在大气中，结果造成地球温度的上升。大气中，结果造成地球温度的上升。主句是主句是 “It means”; that 引导的是宾语从句，引导的是宾语从句，其中的分词短语其中的分词短语 “causing the global temperature to go up”作结果状语。作结果状语。 tend vi.倾向；易于；照顾倾向；易于；照顾 vt.照顾；护理照顾；护理1)tend to/toward sth. 有

34、有的趋势；倾向于的趋势；倾向于 tend (to) 照顾照顾 2)tendency n.倾向倾向 a tendency to/towards sth的倾向，趋势的倾向，趋势 have a tendency to do sth. 倾向于做某事，倾向于做某事， 往往会做某事往往会做某事Eg. My grandmother tends to go to bed early every day. He has a tendency to forget things.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N

35、ew factories are going up everywhere. 到处在兴建新工厂。到处在兴建新工厂。 result in 产生，导致产生，导致 （lead to, cause sth to happen) result from 由由引起，产生引起，产生 ( lie in, occur, as a result of/because of )The accident resulted _ the drivers carelessness, which resulted _ the death of two passengers.fromin8.1.The experiment _

36、the discovery of a cure for cancer. A. resulted in B. lead to C. resulted from D. was caused by2. He slipped and broke his leg. _, he will have to be away from school for two or three months. A. Resulting in B. With the result that C. As a result D. The result is that9. On the one hand, Dr Foster th

37、inks that the trend which increases the temperature by 5 degrees would be a catastrophe. On the one hand, this activity is interesting ; on the other hand ,it makes people happy . You should pay attention to the trend of public opinion.(舆论导向）舆论导向） The earthquake was a terrible catastrophe. 10. On th

38、e 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.在另一方面在另一方面, 还有一些人还有一些人, 对这一观点对这一观点持反对态度持反对态度, 像科学家乔治像科学家乔治 汉布利汉布利, 他们认为我们不必担心空气中高含量他们认为我们不必担心空气中高含量的二氧化碳。的二氧化碳。on the other hand: 另一方面另一方面

39、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。oppose vt. 反对反对; 反抗反抗 如：如：be opposed to sth./doing sth. 反对某事反对某事/做某事做某事I am opposed to going shoppin

40、g 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。The young man opposed/objected to turning to his parents for help.11. consequence n. 结果结果, 后果后果, 影响影响 in conseque

41、nce 因此因此 as a consequence 结果结果 as a consequence of 由于由于的结果的结果 It rained yesterday and in consequence the match was canceled. He studied hard, and in consequence he passed the exam. +n.12. state +that从句从句 +wh-从句；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

42、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；13. Range n. 范围，种类范围，种类1）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

43、达不到的 in/ within range 在在范围内范围内 a wide range of 一系列一系列 a full range of 各种各种 这家商店商品品种多。这家商店商品品种多。 The shop keeps _.a wide range of goods 2)range from to 在什么范围内变动在什么范围内变动 range betweenand 在什么和什么范围内变动在什么和什么范围内变动温度在温度在15度到度到35度之间。度之间。The temperature _.ranges from 15 to 35 degrees14. built up逐步建立；增加；增进逐步建

44、立；增加；增进 (1)build up ones confidence/body 增强自信增强自信/体质体质(2)build sb./oneself up 增强某人的体质；使更加强壮增强某人的体质；使更加强壮(3)build on.在在的基础上发展的基础上发展Traffic is building up on roads into the city.来往的车辆在通往市区的道路上越聚来往的车辆在通往市区的道路上越聚越多。越多。You need more protein to build you up. 你需要增加蛋白质以增强体质。你需要增加蛋白质以增强体质。15. even if /though

45、: 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.16. keep on 继续继续We kept on

46、 working in the field in spite of the rain.尽管下雨，我们还是坚持在地里劳动。尽管下雨，我们还是坚持在地里劳动。The children kept on writing though the bell was ringing.尽管铃声在响着，尽管铃声在响着，孩子们还是继续写着。孩子们还是继续写着。17.On the whole the warming of the earth is a phenomenon that causes great concern.总体上来说，全球气候变暖是一种引起广泛总体上来说，全球气候变暖是一种引起广泛关注的现象。关注的

47、现象。His business，on the whole，was successful. 他的事业大体上是成功的。他的事业大体上是成功的。My opinion is on the whole the same as yours. 我的意见大体上同你的差不多。我的意见大体上同你的差不多。On the whole our talks were going on smoothly. 总的来说，我们的谈判进展顺利。总的来说，我们的谈判进展顺利。Discovering useful Discovering useful words and words and expressionsexpressions

48、 Find the words in the text that have these two meanings. Take notice of the meaning used in the reading passage, write the words and mark their usage in the chart.1Possible meaningsword Which used1 n. a general tendency in the way a situation is changing2 v. to start doing something that everyone c

49、opiestrend11 v. to make something (especially something bad) increase2 n. a substance that can be burned to make heat or energyfuel21 n. the physical or mental condition of someone2 v. to formally say or write some information or an opinionstate21 v. to use time, energy, goods, etc2 v. (formal) to e

50、at or drink somethingconsume11 v. to look quickly at someone or something2 v. to read something very quicklyglance2 Go over the new words and phrases in the previous sections. Then complete each sentence with one of those new words or phrases.21. Charles Keeling collected _on the carbon dioxide cont