B6Unit4Globalwarming[全套課件]

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1、Unit 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 house Things that use energy Sources of e

2、nergylights 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 u

3、p II ( 5 m ) What? What kind? Renewable?A coal power station , non-renewable. What? What kind? Renewable?An oil refinery(精煉廠), non-renewable. What? What kind? Renewable?A nuclear power plant, non-renewable. What? What kind? Renewable?A hydro-electric dam, renewable. Geothermal (地熱的) Energy Plant Coa

4、l 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-renewable Renewable What are fossil fuels? Ancient animal and plant material below the surface of

5、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 p

6、lants? If lack of solar energy, the plantsGreenhouse Greenhouse gases! What are greenhouse gases? Whats greenhouse effect? Lets see the following picture about it. Global WarmingReading Read the passage again to find out the answers to the questions in Ex.1Reading I scanning (5m) 1.Who wrote the mag

7、azine 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

8、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

9、 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)T FT T How many parts can the text be divide

10、d 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

11、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 stat

12、ement about the election.D. The magazine has 12 issues each year.B 3. 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 effe

13、cts of global warming.D The different ideas between Dr. Janice Foster 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 Mond

14、ay 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 is 7. -Why didnt

15、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

16、9. It was 1969_ the American astronauts succeeded in landing on the moon.A. that B. when C. on which D. which 10. 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; that 1. It was about 600 years ago _ the first clock with a f

17、ace 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. so高 考 鏈 接 3. It is these poisonous products _ can cause the symptoms of the flu, such as headache

18、 and aching muscles. (NMET 2003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)A. What is it that B. What it is thatC. How is it that D. How it is that 5. It was _ back home after the experiment. (NMET 2004湖北)A. not until midnight did he goB. unti

19、l 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)A. because B. which C. since D. that Assignment Review the grammar and then finish the exercises on P29.

20、Unit 4 Global WarmingSave the earth! What can we do about 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. Co

21、astal 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

22、 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

23、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 sugge

24、stions in the chart on P30, and discuss whether you can carry out each suggestion. Give reason for you answers.Earth Cares suggestion Can you carry it? Reason Earth Cares suggestion Can you carry it? ReasonIf you are not using electrical appliances, turn them off. Yes Save energyIf youre cold, put o

25、n more clothes instead of turning up the heat. Yes Save energyMotor vehicles use a lot of energy, so walk or ride a bike if you can. Yes Save energyRecycle cans, bottles, plastics and newspapers and buy things made from recycled materials. Yes Save energy Earth Cares suggestion Can you carry it? Rea

26、sonGet your parents or friends to buy products that are made to save energy. Yes Save energyPlant more trees Yes Plants absorb carbon dioxide from the airTalk with your family and friends about global warming and tell them what youve learned. Yes Together, individuals can make a difference. Clean up

27、 Your Butts and BagsRead Toms essay about litter. Make a summary for each paragraph, and then fill in the following table.Reading task on 66 First para. Point of viewSecond para. First point of the argumentEvidence Third para. Second point of the argument EvidenceFourth para. Point of view First par

28、a. 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 l

29、ittered 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

30、 point of the argument Evidence Plastic 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 environm

31、ent. Fourth para. Point of view The 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.