全整编汇总大学英语(第二版)综合教学教程第5册Unit5.ppt

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1、B R _ main0,B R _ main,An English Song The Incredibles,Global Warming,Greenhouse Effect,Warm-up Exercise,Background Information,B R _ English Song,An English Song The Incredibles Lunatica,Learn and Know,Listen and Feel,Listen and Discuss,B R _ Introductory Remarks,Listen to the song “The Incredibles

2、”. Write down the key lyric of the song and discuss the topic mentioned.,Listen and Discuss,Tips: tiny and blueperfect place wake upmankind striking backglobal warming make things right,Directions:,B R _ Teach Your Children 1,Learn and Know,Lunatica is a symphonic metal band from Switzerland. Lunati

3、ca was formed in the winter of 1998.,Genres,Years active,Labels,Origin,Suhr, Switzerland,Symphonic metal Progressive metal,1998present,Frontiers Records Napalm Records,Background Information,B R _ Teach Your Children 2,Members,Andrea DtwylerSandro DIncauMarc TorrettiEmilio MG BarrantesAlex SeiberlRo

4、nny Wolf,B R _ Questions and Answers,Listen and Feel,Listen to the song again and fill in the blanks with what you hear.,The Incredibles Once upon a time there was a planet so tiny and blue It was the to be But one life form on it wanted more But they dont see that its half past twelveTo turn is the

5、 easier way as long as they feel safe in their bedsTheres no need to from their dream But the truth no longer hides They must see what theyll,perfect place,_,a blind eye,_,wake up,_,leave behind,_,Directions:,B R _ Questions and Answers,Wake up, mankind, your time is running out Give your children t

6、he chance to Now the planet is And, of course, the lamenting is big , pollution as well Is not enough to make them That now is the time to changeTheir behavior and Wake up, mankind, your time is running outGive your children the chance to make things right,make things right,_,Global warming,_,unders

7、tand,_,worlds fate,_,striking back,_,B R _ A Survey,B R _ Crosby, Stills and Nash 1,Global warming refers to an average increase in the Earths temperature, which in turn causes changes in climate. A warmer Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impac

8、ts on plants, wildlife, and humans. When scientists talk about the issue of climate change, their concern is about global warming caused by human activities.,B R _ English Song,Greenhouse Effect,What Causes the Greenhouse Effect?,How do Humans Contribute to the Greenhouse Effect?,What is Greenhouse

9、Effect?,B R _ A Survey,B R _ Crosby, Stills and Nash 1,What is Greenhouse Effect?,The greenhouse effect is a naturally occurring process that aids in heating the Earths surface and atmosphere. It results from the fact that certain atmospheric gases, such as carbon dioxide, water vapor, and methane,

10、are able to change the energy balance of the planet by absorbing longwave radiation emitted from the Earths surface.,B R _ A Survey,What is Greenhouse Effect?,B R _ A Survey,Watch the video clip and try to retell it with the help of the words and phrases given below.,the sun, radiation, warm the pla

11、net, natural source of heat, absorb, get trapped to the layer, escape, extra bit hotter, over and over again,B R _ A Practical Experiment 1,How do Humans Contribute to the Greenhouse Effect?, Burning natural gas, coal and oil Some farming practices and land-use changes Many factories producing long-

12、lasting industrial gases Deforestation Population growth,B R _ A Practical Experiment 2,Warm-up Exercise Watch the video clip and write down the kinds of energy mentioned.,B R _ A Practical Experiment 3,flowing water, wind, fossil, solar, chemical reactions, nuclear energy,Tips:,MICRO-HYDRO: Small-s

13、cale systems tap the energy of flowing water. These are not to be confused with big dam projects which totally transform ecosystems, wreaking environmental havoc.,B R _ A Practical Experiment 4,WIND POWER: An ancient source undergoing a revival with modern turbine technology.,B R _ A Practical Exper

14、iment 5,FOSSIL FUELS: Derived from long-dead organic and animal matter. Oil, coal, and natural gas are all fossil fuels.,B R _ A Practical Experiment 5,SOLAR ENERGY: The suns power can be harnessed in various ways: by using photovoltaic cells to generate electricity directly; by using thermal collec

15、tors to make steam to generate electricity; by using passive solar materials that maximize or retain the suns heat.,B R _ A Practical Experiment 5,BIOMASS: Biomass is vegetal or organic material including dung and plants and biofuels are the solid or liquid or gaseous fuels that derive from it. Wood

16、, methane and alcohol are all biofuels.,B R _ A Practical Experiment 5,NUCLEAR ENERGY: Currently produced by “fission”. An atom is split using uranium and the heat produced drives steam turbines to generate electricity.,B R _ English Song,Background Information,El Nino,Shishmaref,Hurricane Katrina,B

17、 R _ Education in the West 1,Hurricane Katrina,B R _ Education in the West 2,El Nino,B R _ Education in the West 2,Shishmaref,G R _ main,Part Division of the Text,Further Understanding,G R _ Further Understanding,Further Understanding,For Part 2 Questions and Answers,For Part 3 insects are devouring

18、 vast swaths of forest; and thawing permafrost is sinking roads, pipelines and homes. Arctic Ocean ice has shrunk 5% to 10%, at an accelerating rate. “Shishmaref is the canary in the coal mine an indicator of whats to come elsewhere,” said Gunter Weller, director of the University of Alaskas Co-oper

19、ative Institute for Arctic Research. “The evidence is overwhelming that humanity has altered the climate.”,D R _ Text 6,D R _ Text 7,6 From Miami to Shishmaref, and at many points in between, people say the weather doesnt seem normal anymore. Yet to put matters in perspective, there is no such thing

20、 as normal weather. As Midwestern farmers often opine, “If you dont like the weather, just wait five minutes.” And seasons are rarely normal. Winter snowfall and summer heat waves beat the average some years and fail to reach it in others. Its tough to pick out overall changes in climate in the face

21、 of these natural fluctuations. An unusually warm year, for example, or even three in a row dont necessarily signal a significant general trend.,7 Yet the earths climate does change. Ice ages have frosted the planet for tens of thousands of years at a stretch, and periods of warmth have pushed the t

22、ropics well into what is now the temperate zone. But given the normal year-to-year variations, the only reliable signal that such changes may be in the works is a long-term shift in worldwide temperature.,D R _ Text 8,D R _ Text 9,8 And that is precisely whats happening. In 1988, when Time named Ear

23、th the Planet of the Year, the idea that our world was warming up as a result of human activity was largely theoretical. We knew that since the Industrial Revolution began in the 18th century, factories and power plants and automobiles and farms have been loading the atmosphere with heat-trapping ga

24、ses. But evidence that the climate was actually getting hotter was still murky.,D R _ Text 10,9 Not anymore. Reports, studies and articles from esteemed scientific organizations have now demonstrated that worldwide temperatures climbed more than 1 over the past century, and that the 1990s were the h

25、ottest decade on record. Look around: snow fields, including the legendary snows of Kilimanjaro, are disappearing from mountaintops around the globe. Coral reefs are dying off as the seas get too warm for comfort.,Drought is the norm in parts of Asia and Africa. El Nino events, which trigger devasta

26、ting weather in the eastern Pacific, are more frequent. The Arctic permafrost is starting to melt. Lakes and rivers in colder climates are freezing later and thawing earlier each year. Plants and animals are shifting their ranges poleward and to higher altitudes, and migration patterns for animals a

27、s diverse as polar bears, butterflies and beluga whales are being disrupted.,D R _ Text 11,10 Faced with these hard facts, most scientists no longer doubt that global warming is happening, and almost nobody questions the fact that humans are at least in part responsible. Nor are the changes over. Al

28、ready, humans have increased the concentration of carbon dioxide, the most abundant heat-trapping gas in the atmosphere, to 30% above preindustrial levels and each year the percentage increases. The obvious conclusion: temperatures will keep going up.,D R _ Text 12,11 If the rise is large enough, th

29、e results could be disastrous. With seas rising as much as 3 ft., enormous areas of densely populated land coastal Florida, much of Louisiana, the Nile Delta, the Maldives, Bangladesh would become uninhabitable. Entire climatic zones might shift dramatically, making central Canada look more like cen

30、tral Illinois, Georgia more like Guatemala. Agriculture would be thrown into turmoil. Hundreds of millions of people would have to migrate from unlivable regions.,D R _ Text 13,12 Public health would suffer. Rising seas could contaminate water supplies with salt. Higher levels of urban ozone, the re

31、sult of stronger sunlight and warmer temperatures, could exacerbate respiratory illnesses. Warmer temperatures could widen the range of disease-carrying rodents and bugs, such as mosquitoes and ticks, increasing the incidence of dengue fever, malaria, encephalitis, Lyme disease and other afflictions

32、. Humans will have a hard enough time adjusting, especially in poorer countries, but for wildlife the changes could be devastating.,D R _ Text 14,13 “There is no doubt that climate is changing and humans are partly responsible,” Kevin Trenberth, head of the climate-analysis section at the National C

33、enter for Atmospheric Research (NCAR) in Boulder, Colo., told Time. “The odds have changed in favor of more intense storms and heavier rainfalls.” Says NCAR meteorologist Greg Holland: “These are not small changes. Were talking about a very large change.”,D R _ Text 15,14 Some scientists are studyin

34、g not just climate change but also the even more alarming phenomenon of abrupt climate change. Complex systems like the atmosphere are known to move from one steady state to another with only very brief transitions in between. (Think of water: when put over a flame, it becomes hotter and hotter unti

35、l suddenly it turns into steam.) Ice cores taken from Greenland in the 1990s by geoscientist Richard Alley of Pennsylvania State University show that the last ice age came to an end not in the slow creep of geological time but in the quick pop of real time, with the entire planet abruptly warming in

36、 just three years.,D R _ Text 16,15 Studies like these may not be enough to convince the naysayers on global warming. What does seem certain is that the ranks of those skeptics are growing thinner just like the permafrost in Shishmaref.,D R _ Text 17,D R _ Sentence 2 _ Benjamin was ,Paraphrase the s

37、entence.,Global warming is traumatizing.,Global warming, caused in part by the burning of oil and gas in factories and cars, is traumatizing not only the Gulf of Mexico but also polar regions, where the complex meteorological processes associated with snow, permafrost and ice magnify its effects.,Tr

38、anslate the sentence into Chinese.,由于工厂和汽车烧石油和煤气而部分地导致的全球气候变暖，不仅使墨西哥湾遭受创伤，而且殃及极地，与雪、永久冻土和冰关联的复杂的气象变化过程加大了气候变暖给极地带来的影响。,D R _ Sentence 1 _ Because of ,What does the sentence mean?,Coal miners in the United Kingdom and the United States brought canaries into coal mines as an early-warning signal for t

39、oxic gases including methane and carbon monoxide. The term canary in a coal mine has become a popular expression often used to describe a sign that something is going to happen in the near future.,Shishmaref is the canary in the coal mine an indicator of whats to come elsewhere.,D R _ Sentence 3 _ a

40、nd to ,Translate the sentence into Chinese.,但是，考虑到每年都有的正常变化，能显示这种可能在酝酿中的变动的唯一可靠信号，只能是世界范围内气温的长期变化情况。,But given the normal year-to-year variations, the only reliable signal that such changes may be in the works is a long-term shift in worldwide temperature.,D R _ Sentence 4 _ since the child ,Paraphr

41、ase this sentence.,We knew that since the Industrial Revolution began in the 18th century, factories and power plants and automobiles and farms have been emitting gases which can trap the heat into atmosphere.,We knew that since the Industrial Revolution began in the 18th century, factories and powe

42、r plants and automobiles and farms have been loading the atmosphere with heat-trapping gases.,Translate this sentence into Chinese.,我们知道，自18世纪工业革命开始以来，工厂、发电厂、汽车和农场一直把聚集热量的气体排入大气层中。,D R _ Sentence 5 _ He may well ,Translate this sentence into Chinese.,倘若海平面上升高达3英尺，大片人口稠密的地区佛罗里达州沿海地区、路易斯安那州大部分地方、尼罗河三角

43、洲、马尔代夫、孟加拉国将无法居住。,With seas rising as much as 3 ft., enormous areas of densely populated land coastal Florida, much of Louisiana, the Nile Delta, the Maldives, Bangladesh would become uninhabitable.,D R _ Sentence 6 _ He was having ,Paraphrase this sentence.,The chances are that it tends to have mor

44、e strong storms and severe rainfalls.,“The odds have changed in favor of more intense storms and heavier rainfalls.” Says NCAR meteorologist Greg Holland ,Translate the sentence into Chinese.,“气候朝着可能会有更多强风暴和更大降雨量的方向 变化。”国家大气研究中心气象学家格雷格霍蓝德说。,D R _ Sentence 7 _ whether it be ,Translate this sentence i

45、nto Chinese.,大家知道，像大气这样的复杂系统从一种稳定状态转到另一种状态，其间只有非常短暂的过渡期。,Complex systems like the atmosphere are known to move from one steady state to another with only very brief transitions in between.,What does the sentence imply?,It is urgent for people to stop global warming. Otherwise, the world would be dev

46、astating.,D R _ word _ skeptic,skeptic: n. a person inclined to question or doubt all accepted opinions,Even some former skeptics said that probably 95 percent of experts now accept the notion.,她是全球变暖危险的怀疑论者。,She is a skeptic about the dangers of global warming.,D R _ word _ batter,batter: vt. hit s

47、b. or sth. again and again, in a way that hurts someone or causes damage,Teachers suspect that the child is being battered regularly by his parents.,He was battered on the head with a cricket bat.,Pattern:,batter at/on/against sth.,batter sth. down,连续敲击,（连续重击以致）砸毁，砸倒,D R _ word _ hurricane,hurricane

48、: n. a violent storm with very strong fast winds,They had the shattering, overwhelming strength of earthquake and hurricane and volcano.,飓风强烈地刮着, 树都被连根拔起了。,The hurricane blew with such force that trees were uprooted.,D R _ word _ hammer1,hammer: 1. v. hit or beat (sth.) repeatedly with a hammer or s

49、imilar object,British industry was being hammered by the recession.,他们必须日复一日地拼命工作以完成这两篇紧密相关的论文。,They must hammer away at these twin themes day after day.,The rain was hammering against the window.,D R _ word _ hammer2,2. n. a tool with a heavy metal head mounted at right angles at the end of a handle, used for jobs such as breaking things and driving in nails,Now move the wooden handle of the hammer gradually over the edge of the table.