学年高中英语Unit4GlobalwarmingSectionⅠWarmingampReadingPrereading教学案新人教版选修6.docx

1、学年高中英语Unit4GlobalwarmingSectionWarmingampReadingPrereading教学案新人教版选修6Unit 4 Global warmingThe greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere 大气；大气层 trap energy from the sun. Without these gases， heat would escape back into space and Ear

2、ths average temperature would be about 60F colder. Because of how they warm our world， these gases are referred to as greenhouse gases.,Have you ever seen a greenhouse？ Most greenhouses look like a small glass house. Greenhouses are used to grow plants， especially in the winter. Greenhouses work by

3、trapping heat from the sun. The glass panels 面，板 of the greenhouselet in light butkeep heatfromescaping. This causes the greenhouse to heat up， much like the inside of a car parked in sunlight， and keeps the plants warm enough to live in the winter.,The Earths atmosphere is all around us.It is the a

4、ir that we breathe. Greenhouse gases in the atmosphere behave much like the glass panes 窗玻璃 in a greenhouse. Sunlight enters the Earths atmosphere， passing through the blanket of greenhouse gases. As it reaches the Earths surface， land， water， and biosphere 生物圈 absorb the sunlights energy. Once abso

5、rbed， this energy is sent back into the atmosphere. Some of the energy passes back into space， but much of it remains trapped in the atmosphere by the greenhouse gases， causing our world to heat up.,The greenhouse effect is important. Without the greenhouse effect， the Earth would not be warm enough

6、 for humans to live. But if the greenhouse effect becomes stronger， it could make the Earth warmer than usual. Even a little extra warming may cause problems for humans， plants， and animals.Section_Warming Up & Reading PrereadingTHE EARTH IS BECOMING WARMER BUT DOES IT MATTER?During the 20th century

7、 the temperature of the earth rose about one degree Fahrenheit. That probably does not seem much to you or me, but it is a rapid increase when compared to other natural changes. So how has this come about and does it matter? EarthCares Sophie Armstrong explores these questions.There is no doubt that

8、 the earth is becoming warmer (see Graph 1) and that it is human activity that has caused this global warming rather than a random but natural phenomenon.Fahrenheit/frnhaIt/adj.华氏的n.华氏温度计compared to 与相比when compared to .是“when过去分词”结构，也可看作时间状语从句的省略，补充完整为when it is compared to .。come about 发生；造成，为不及物动

9、词短语。Sophie/sfI/索菲(女名)Armstrong/mstr/阿姆斯特朗(姓)graph/rf/n.图表；坐标图；曲线图random/rndm/adj.胡乱的；任意的phenomenon/fInmInn; US fnmnn/(复数ena/In； n/)n.现象地球在变暖但是这会带来什么影响吗？第12段译文在20世纪期间，地球温度大约上升了1华氏度。这个数值对你我来说很可能是无所谓的，但是跟其他自然变化相比较而言，这却是一种快速的增长。那么，这种温度的增长是怎么产生的呢？会产生什么影响吗？“关爱地球”组织的索菲阿姆斯特朗就在探究这些问题。毫无疑问，地球在变暖(见曲线图一)，而全球变暖正

10、是人类活动导致的，并非一种随意的自然现象。All scientists subscribe to the view that the increase in the earths temperature is due to the burning of fossilfuels like coal, natural gas and oil to produce energy. Some byproducts of this process are called “greenhouse” gases, the most important one of which is carbon dioxid

11、e. Dr Janice Foster explains: “There is a natural phenomenon that scientists call the greenhouse effect. This is when small amounts of gases in the atmosphere, like carbon dioxide, methane and water vapour, trap heat from the sun and therefore warm the earth. Without the greenhouse effect， the earth

12、 would be about thirtythree degrees Celsius cooler than it is. So, we need those gases. The problem begins when we add huge quantities of extra carbon dioxide into the atmosphere. It means that more heat energy tends to be trapped in the atmosphere causing the global temperature to go up.”subscribe

13、to 同意；赞成；订购subscribe/sbskraIb/vi.同意；捐赠；订阅vt.签署(文件)；捐助fossil/fsl/n.化石；从地下采掘出来的(矿物)fuel/fjul/n.燃料that the increase . is due to .是that引导的同位语从句，对the view作进一步的解释和说明。byproduct/baIprdkt/n.副产品the most important one of which .是“代词ofwhich”引导的非限制性定语从句。Janice/dnIs/贾尼丝(女名)Foster/fst/福斯特(姓或男名)that scientists call

14、 .是that引导的定语从句，修饰a natural phenomenon, that在从句中作call的宾语。when small amounts of gases至本句末是when引导的表语从句。methane/mieIn/n.甲烷；沼气warm vt.(使)变暖画线部分是without引导的含蓄虚拟条件句。Celsius/selsIs/adj.(温度)摄氏的quantities of 大量的quantity/kwnttI/n.量；数量tend/tend/vi.趋向；易于；照顾 vt.照顾；护理tend to do 倾向于/往往做go up 上升；增长；升起第3段译文,所有的科学家赞同这种

15、观点：人们为了取得能量而燃烧化石燃料 如煤、天然气和石油 ，从而引起了地球温度的升高。这个过程 燃烧化石燃料 的一些副产品就叫作“温室”气体，其中最重要的就是二氧化碳。贾尼丝福斯特博士解释说：“有一种科学家称之为温室效应的自然现象。这种现象就是大气层中少量的气体 如二氧化碳、甲烷、水蒸气等 吸收太阳的热量，因而使地球变暖。如果没有这种温室效应，地球的温度将比现在的温度还要低33摄氏度左右。因此，我们需要那些气体。当我们在大气层中增加了大量额外的二氧化碳时，问题就来了。这意味着更多的热量有被困在大气层中的倾向，从而引起全球气温上升。”We know that the levels of carb

16、on dioxide have increased greatly over the last 100 to 150 years. It was a scientist called Charles Keeling， who made accurate measurements of the amount of carbon dioxide in the atmosphere from 1957 to 1997. He found that between these years the carbon dioxide in the atmosphere went up from around

17、315 parts to around 370 parts per million (see Graph 2)All scientists accept this data. They also agree that it is the burning of more and more fossil fuels that has resulted in this increase in carbon dioxide. So how high will the temperature increase go? Dr Janice Foster says that over the next 10

18、0 years the amount of warming could be as low as 1 to 1.5 degrees Celsius, but it could be as high as 5 degrees. Charles Keeling/kilI/查尔斯基林measurement/memnt/n.衡量；测量；尺寸make/take measurements 作测量take sb.s measurement 给某人量尺寸the amount of . 的数量per/p/prep.每；每一data/deIt，dt/n.资料；数据a mass of data 大量资料data b

19、ank 数据库；资料库result in导致result in后跟结果，而result from后跟原因。第45段译文,我们知道，在过去100150年期间，二氧化碳的含量急剧增加了。有一位名叫查尔斯基林的科学家曾经把19571997年期间大气层中二氧化碳的含量作了精确的统计。他发现，在这些年里，大气层中的二氧化碳含量从大约315/1 000 000上升到大约370/1 000 000 见曲线图二 。,所有科学家都接受这个数据。他们还赞同下述观点：正是燃烧越来越多的化石燃料导致了二氧化碳的增加。那么气温会升到多高？贾尼丝福斯特博士说，在今后的100年里，全球变暖的量可能低到11.5摄氏度，但是也

20、有可能高达5摄氏度。However, the attitudes of scientists towards this rise are completely different. On the one would lead to a catastrophe. She says, “We cant predict the climate well enough to know what to expect， but it could be very serious.” Others who agree with her think there may be a rise of several

21、metres in the sea level, or predict severe storms, floods， droughts， famines， the spread of diseases and the disappearance of species. On the other hand, there are those, like George Hambley， who are opposed to this view and believe that we should not worry about high levels of carbon dioxide in the

22、 air. They predict that any warming will be mild with few bad environmentalconsequences. In fact, Hambley states， “More carbon dioxide is actually a positive thing. It will make plants grow quicker; crops will produce more; it will encourage a greater range of animals all of which will make life for

23、 human beings hand， Dr Foster thinks that any trend in which the temperature increases by 5 degrees better.”Greenhouse gases continue to build up in the atmosphere. Even if we start reducing the amount of carbon dioxide and other greenhouse gases, the climate is going to keep on warming for decades

24、or centuries. No one knows the effects of global warming. Does that mean we should do nothing? Or, are the risks too great？on the one hand 一方面trend/trend/n.趋势；倾向；走向catastrophe/ktstrfI/n.大灾难；浩劫what to expect为“疑问词不定式”结构，在句中作know的宾语。flood/fld/n.洪水；水灾drought/drat/n.旱灾；干旱famine/fmIn/n.饥荒George Hambley/hm

25、blI/乔治汉布利be opposed to 反对opposed/pzd/adj.反对的；对立的oppose/pz/vt.反对；反抗；与(某人)较量mild/maIld/adj.温和的；温柔的；淡的environmental/InvaIrnmentl/adj.环境的consequence/knsIkwns; US kwens/n.结果；后果；影响state/steIt/vt.陈述；说明range/reInd/n.种类；范围build up 增加；逐步建立；增进even if “即使”，引导让步状语从句。keep on 继续第67段译文,然而，科学家们在对待升温的态度上却是大不相同的。一方面，福

26、斯特博士认为任何气温升高5度的趋势都可能导致一场大灾难，她说：“对于未来的气候，我们不可能作出精确的预测，但是那时的天气可能是很糟糕的。”同意她的观点的其他科学家认为，全球变暖会导致海平面上升好几米；也有人预言会出现严重的风暴、洪涝、干旱、饥荒、疾病的传播和物种的灭绝。另一方面，有一些科学家，像乔治汉布利，反对这种观点，他们认为我们不必担心空气中高含量的二氧化碳。他们预测任何变暖的情况不会很严重，对环境的影响也不会太坏。汉布利实际上是这样说的：“二氧化碳含量的增加实际上是件好事，它会使植物生长更快，庄稼产量更高，还会促进动物种类的增多所有这些都能改善人类的生活。”,温室气体继续在大气层中增加。

27、即使我们开始减少二氧化碳和其他温室气体的含量，在 未来 几十年或几个世纪内，气候仍会持续变暖。没有人知道全球变暖会带来什么样的影响。这是不是意味着我们就不必采取任何措施呢？还是说，这样不采取任何措施危险性会很大呢？PrereadingPlease match the words with their proper meanings.1consume Aagree to; contribute (a sum of money)2phenomenon Buse sth. up3subscribe Cmaterial burned to produce heat or power, eg. wood

28、, coal, oil, etc.4fuel Dfact or occurrence, esp. in nature or society, that can be perceived by the senses5glance Eexpress strong disapproval of or disagreement with sb./sth.6oppose Fexpress sth. in spoken or written words, esp. carefully, fully and clearly7consequence Ga result of sth. that has hap

29、pened8state Hread through/at a newspaper, report or book, without reading it very carefully15_68_答案：15BDACH68EGF LeadinWe depend on energy to do many things. Can you name out the following kinds of energy?答案：A.fuelsBwind powerCwaterDsun (solar energy)WhilereadingFastreadingSkim the text and sum up t

30、he main idea of each paragraph.Para.1 Athe cause of the earths becoming warmerPara.2 Bthe consequence of burning fossil fuelsPara.3 Cthe increase of carbon dioxidePara.4 Dglobal warming will go onPara.5 Epuzzles about global warmingPara.6 Fdifferent attitudes to global warmingPara.7 Gan introduction to the passagePara.1_G_Para.2_A_Para.3_B_Para.4_C_Para.5_D_Para.6_F_Para.7_E_CarefulreadingRead the text and choose the best answers.1Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1997?