B6Unit4Globalwarming[全套课件]

Unit 4 Global WarmingUnit 4 Global WarmingSave the earth!Work in groups -list things as required :1. Things that use energy around us or at any other places,( ie. light)2.Sources of energy (ie. coal)Warming up I ( m ) Things that use energy around us or at any other places:In a houseThings that use energySources of energylights television cassette player computerfridge stove washing machine hairdryer video recorder coal oilnatural gas wind(power)sun(solar energy) water(hydro-electric power) the sea ( tidal energy) uranium(nuclear energy)plant waster(biomass energy)Windmills, renewable.What? Renewable?Warming up II ( 5 m )What? What kind? Renewable?A coal power station , non-renewable.What? What kind? Renewable?An oil refinery(精炼厂精炼厂), non-renewable.What? What kind? Renewable?A nuclear power plant, non-renewable.What? What kind? Renewable?A hydro-electric dam, renewable.Geothermal (地热的地热的) Energy Plant Coal Oil Natural gas Uranium Wind (wind power) Sun (solar energy) Water (hydro-electric power) Plant waste (biomass energy) Hot springs or geysers (geothermal energy) The sea (tidal energy)Fossil fuelsNon-renewableRenewableWhat are fossil fuels? 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. Also known as non-renewable energy because once they are used they have gone forever; they cannot be renewed.What about the weather?9 / 14We needPre-reading ( 3m )The sun. How about the plants?If lack of solar energy, the plantsGreenhouseGreenhouse gases! What are greenhouse gases? Whats greenhouse effect?Lets see the following picture about it.Global WarmingReadingRead the passage again to find out the answers to the questions in Ex.1Reading I scanning (5m)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? Sophie Armstrong, Earth Care. Dr Janice Foster, Charles Keeling, George Hambley. 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 worry about it.3. What do they think about global warming? Do they agree with one another? 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 1977. Global warming / the warming of the earth4. What are the two graphs about?5. What is the main topic of the article?Read the passage carefully and judge whether the statements are true or false?FTReading II-skimming (5m)TFTTHow many parts can the text be divided into?Tips:Part 1 (para _)Part 2 (para _ to _)Part 3 (para _ to _)Part 4 (para _ to _)Reading III-detailed reading (8m)Choices.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.BReading IV (3m)2. But there are some very different attitudes among scientists towards this issue.“ Issue here means the same as the one in_.A. I bought the new stamp the day of its issue. B. They are talking about one of the key issues in the election campaign.C. The government is expected to issue a statement about the election.D. The magazine has 12 issues each year.B3. 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.DThe different ideas between Dr. Janice Foster & George Hambley Dr. Janice FosterGeorge 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 _ and will en- courage _.go upcatastropheVery seriouspositiveproducea greater range of animalsReading V (4m)SummarySkim over the passage, and tell what you have learnt in class. Try to talk in general terms rather than in details.eg: I learnt that the earth is becoming warmer. I learnt that global warming could have terrible effects on the environment. .DebateABA : We shall do something about global warming.B: We shall do nothing about global warming.Assignment1.Read the passage again and review the new words and expressions.2.Prepare the debate in groups.3.Surf the Internet for more information about global warming.Unit 4 Global WarmingUnit 4 Global WarmingSave the earth!强调句型强调句型强调句型，你掌握了吗？强调句型，你掌握了吗？一、一、 It is/was+ 被强调部分被强调部分 + that+剩余的部剩余的部分分 被强调部分是人被强调部分是人 who/whom/ that +剩余的部分剩余的部分 注意注意 1. 强调句的连接词一般只用强调句的连接词一般只用 that ； 强调人时，强调人时，可用可用who (主语主语) 或或 whom (宾语宾语).2. 强调句的时态一般为强调句的时态一般为“It was+that”3. 强调句的一般疑问句句型：强调句的一般疑问句句型：Is / Was +it +所强所强调的部分调的部分+that / who/ whom?4. 强调句的一般疑问句句型：疑问词强调句的一般疑问句句型：疑问词 +所强调的所强调的部分部分+that / who/ whom?1. 我是在街上遇见她的父亲的。我是在街上遇见她的父亲的。(强调在街上强调在街上)2. 你是你是8点开始工作的吗？（强调时间点开始工作的吗？（强调时间）3. 正是因为她病了，他们才没见她做这项工作。正是因为她病了，他们才没见她做这项工作。4. 他为什么不能回答这个问题？他为什么不能回答这个问题？It was in the street that I met her father.Was it at eight oclock that you began to work?Because she was ill, they didnt ask her to do the job.It was because she was ill that they didnt ask her to do the job.Why was it that he couldnt answer the question.（强调原因）（强调原因）判断是否是强调句是，可把判断是否是强调句是，可把 It is / was that 去去掉，剩余部分在不增减任何词的情况下还是掉，剩余部分在不增减任何词的情况下还是一个完整的句子，那么这种句子是强调句。一个完整的句子，那么这种句子是强调句。It was in the street that I met her father. In the street I met her father. It was because she was ill that they didnt ask her to do the job.Because she was ill, they didnt ask her to do the job.二、二、 not . until . 的强调形式的强调形式: It is not until + 被强调部分被强调部分 + that . “直到直到才才”，主要用于强调时间状语的强调句型。主要用于强调时间状语的强调句型。 I didnt realize she was a famous film star until she took off her dark glasses. Not until she took off her dark glasses did I realize she was a famous film star. It was not until she took off her dark glasses that I realized she was a famous film star.三、三、 句子句子的强调手段的强调手段：do / does / did + 动词原形动词原形e.g 我的确相信他是老实人。我的确相信他是老实人。I do believe that he is an honest man.他们昨天的确去看过你，但没见到你。他们昨天的确去看过你，但没见到你。They did go to see you yesterday, but failed to meet you. 四、四、 What +从句从句+ is / was 是名词从句结构，常用来强调主语、宾语。是名词从句结构，常用来强调主语、宾语。e.g他最希望的是成为一名飞行员。（强调宾语）他最希望的是成为一名飞行员。（强调宾语）What he wishes most is to become a pilot. 所叙述的是所叙述的是现在或者将现在或者将来来发生的事情发生的事情What +从句从句 is 所叙述的是所叙述的是过去过去发生的发生的事情事情What +从句从句 was What interested me most was the beautiful scenery. 给予我们鼓励的是他为我们树立的榜样。给予我们鼓励的是他为我们树立的榜样。（强调强调主语主语）What encouraged us was the example he set for us. What +从句从句+ is / was 使我最感兴趣的是那美丽的风景。使我最感兴趣的是那美丽的风景。 （强调主语强调主语）巩固练习：巩固练习：1.It was _ he said _disappointed me.A. what ; that B. that; thatC. what; what D. that; what2. Is it in the factory _ this type of cars are produced?A. which B. where C. that D. / 3. Is it the factory_ this type of cars are produced ?A. which B. where C. that D. /4. _ on Monday night that all this happened?A. Is it B. It is C. Was it D. It was5. It was _ the old worker came that we _ the experiment.A. until; didnt begin B. not until; beganC. until began D. not until; didnt begin 6. It is I _ singing in the garden.A. who are B. who is C. that am D. that is7. -Why didnt you answer when I spoke to you in the street this morning? -I _ but you didnt hear me.A. did answer B. didnt want to answer C. couldnt answer D. was too busy8. It is in the west of China _ there is no doubt _it is going to rain tomorrow.A. where; whether B. that; thatC. that; whether D. where; that 9. It was 1969_ the American astronauts succeeded in landing on the moon.A. that B. when C. on which D. which10. It was the training _ he had as a young man _made him such a famous writer.A. when; that B. that; when C. that; who D. that; that1. It was about 600 years ago _ the first clock with a face and an hour hand was made. (NMET 1997) A. that B. until C. before D. when2. It was only when I reread his poems recently _ I began to appreciate their beauty. (NMET 1998) A. until B. that C. then D. soAB高考链接3. It is these poisonous products _ can cause the symptoms of the flu, such as headache and aching muscles. (NMET 2003上海上海)A.who B. that C. how D. what4. Why! I have nothing to confess. _ you want me to say? (NMET 2004上海上海)A. What is it that B. What it is thatC. How is it that D. How it is thatBA5. It was _ back home after the experiment. (NMET 2004湖北湖北)A. not until midnight did he goB. until midnight that he didnt goC. not until midnight that he wentD. until midnight when he didnt go6. It was with great joy _ he received the news that his lost daughter had been found. (NMET 2004福建福建)A. because B. which C. since D. thatCDAssignment Review the grammar and then finish the exercises on P29.Unit 4 Global WarmingUnit 4 Global WarmingSave the earth!What can we do about What can we do about global warming?global warming? We should do something about global warming. Because it could have many negative effects on the earth. With the temperature increasing, the polar ice caps eventually would melt, causing sea levels to rise by several meters. Coastal and low-lying cities would be submerged. Some scientists predict severe storms, droughts, famines, the spread of diseases and the destructions of species. WHAT CAN WE DO ABOUT GLOBAL WARMING?What shall we do in our daily life?Task 1:Skim the first letter, and answer the questions below:1. Who is the writer?2. What is the purpose of the email? / What are the two concerns of the email?1. Who is the writer?2. What is the purpose of the letter? / What are the two concerns of the letter?A student named Ouyang Guang. His opinion that, as an individual, he can have no effect on environmental problems. Getting some suggestions for what he can do about global warming ; Task 2: Read the second email, and answer the question:Do Earth Care agree with Ouyang Guangs opinion that individuals can have no effect?No, Earth Care dose not agree.Task 3: Now scan the letter and list Earth Cares suggestions in the chart on P30, and discuss whether you can carry out each suggestion. Give reason for you answers.Earth Cares suggestionCan you carry it?ReasonEarth Cares suggestionCan you carry it?ReasonIf you are not using electrical appliances, turn them off. YesSave energyIf youre cold, put on more clothes instead of turning up the heat.YesSave energyMotor vehicles use a lot of energy, so walk or ride a bike if you can.YesSave energyRecycle cans, bottles, plastics and newspapers and buy things made from recycled materials.YesSave energyEarth Cares suggestionCan you carry it?ReasonGet your parents or friends to buy products that are made to save energy.YesSave energyPlant more treesYesPlants absorb carbon dioxide from the airTalk with your family and friends about global warming and tell them what youve learned.YesTogether, individuals can make a difference.Clean up Your Butts and BagsRead Toms essay about litter. Make a summary for each paragraph, and then fill in the following table.Reading task on 66First para.Point of viewSecond para.First point of the argumentEvidence Third para.Second point of the argument EvidenceFourth para.Point of viewFirst para.Point of viewSecond para.First point of the argumentEvidence Cigarette buts and plastic bags are a serious environmental problem.Butts are small but are still bad for the environment.1.1600 billion cigarettes are smoked each year in China. Many of these become litter. 2.4.5 trillion butts are littered every year in the world.3.Butts are ugly.4.Butts contain toxic chemicals. These get into the water supply. These decrease the quality of the water and endanger living things.5.Butts take up to 5 years to break down, so the toxic chemicals add up to a great amount.Evidence:Third para.Second point of the argument EvidencePlastic bags are a danger to the environment.1.Plastic bags are made from non-renewable resources. If they are not recycled, these resources are lost to us.2.In china, 2 billion plastic bags are used every day.3.Plastic bags last from 20 to 1,000 years in the environment.Fourth para.Point of viewThe environment would be less polluted if we cleaned up cigarette butts and plastic bags. The best solution would be not to smoke or use plastic bags at all.AssignmentIn groups of four, make a poster for the school that tells the students various ways they can reduce the amount of carbon dioxide in the air.