高中英語 Unit4 第一學時Reading and Comprehension同步教學課件 新人教版選修6

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1、第一學時第一學時Reading and ComprehensionGlobal warming 1What is the greenhouse made of and used for?2How does it work?3What are the “greenhouse gases”？4What do you think greenhouse gases do?1A greenhouse is made of glass and is used for growing plants，especially during cold weather.2The air inside is warm

2、because the glass traps the heat from the sun and keeps it from escaping.This makes the greenhouse heat up and so the plants can grow throughout the cold period.3In the atmosphere surrounding the earth there are gases，which are called“greenhouse gases”， including carbon dioxide，methane(甲烷，沼氣) and wa

3、ter vapor.4They trap heat from the sun and therefore warm the earth.Task 1快速閱讀課文The Earth is Becoming Warmer But does it Matter？，用大約30詞寫出課文的概要。溫馨提示：本文屬于說明文，它主要以說明為主要表達方式來解說事物，闡明事理，給人以知識。寫概要時要注意說明的對象。(另外這篇文章還包括了人們對全球變暖的這一問題的不同觀點。)_答案：答案：In the passage，Sophie Armstrong explores the questions on how hu

4、man activity creates“greenhouse gases”which directly leads to the global warming，and shows us the different attitudes among scientists towards global warming.Task 2仔細閱讀The Earth is Becoming Warmer But does it Matter？選擇正確答案。1The text mainly discusses_.Awhen the “greenhouse effect” startedBwhat causes

5、 the “greenhouse effect”CDr.Janice Fosters theory on the“greenhouse effect”Dthe fact that the earth is becoming warmer and different theories about itD2All the followings are true EXCEPT_ .Aeveryone believes that global warming is caused by human activitiesBcarbon dioxide is a byproduct of burning f

6、ossil fuelsCpeople accept Charles Keelings data because he took accurate measurementsDnot all the scientists agree with each other on the effect of the global warmingA3The main difference between Dr.Janice Fosters theory and George Hambleys lies in_.Ahow to prevent global warming Bwhat causes global

7、 warming Cwhether global warming would cause serious problems or not Dwhether the levels of carbon dioxide have increase or not over the years C4“But there are some very different attitudes among scientists towards this issue.” “Issue” here means the same as the one in“_”AI bought the new stamp the

8、day of its issueBThis is a big issue；we need more time to think about itCShe is always on a dietshe has issues about foodDThe magazine has 12 issues each yearB5What may happen if we do nothing about global warming? （ ）AThere may be a rise of the sea level.BThe temperature will surely be lower.CThe“g

9、reenhouse effect” will disappear.DIt has nothing to do with us.ATask 3再次閱讀 The Earth is Becoming WarmerBut does it Matter？然后完成下列表格。CausesResultPeople burn 1._ like coal，natural gases and oil to 2._Some byproducts called “greenhouse” gases are also produced in the process，and the most important gas i

10、s 3._1fossil fuels2.produce energy3.carbon dioxideWhen we 4._ huge quantities of extra carbon dioxide into the atmosphere，the global temperature goes 5._The rise of 6._ leads to severe storms,7._，8._，famines，the spread of diseases. Plants grow 9._；crops will produce 10._4.add5.up6.sea level7.floods8

11、.droughts9.quicker10.moreTask 4根據(jù)課文 The Earth is Becoming WarmerBut does it Matter？完成下列短文。There is no doubt 1_ the earth is becoming warmer but there is a fierce debate over whether it is human activity that has caused this global warming or whether it is just a natural phenomenon. Many scientists l

12、ike Dr.Janice Foster believe that people have caused the increase in the earths temperature 2_ the burning of fossil fuels like coal，natural gas and oil to produce energy 3_ byproducts are called “greenhouse” gases，the most important one 4_ carbon dioxide.These gases trap heat from the sun and there

13、fore warm the earth，without whichthe earth 5_ (be) about thirtythree degrees Celsius cooler than it is.But increased amount of carbon dioxide means that 6_ heat energy is trapped in the atmosphere 7_ (cause) the global temperature to go 8_. On 9_ other hand，scientists like George Hambley believe tha

14、t any warming will be mild with 10_ bad environmental consequences and more carbon dioxide is actually a positive thing. 1that2.through3.whose4.being5.would be6.more7.causing8.up9.the10.few一、請將課文The Earth is Becoming WarmerBut does it Matter? 翻譯成漢語，然后對照“譯文助讀”自主勘誤。譯文助讀全球在變暖這會帶來什么影響嗎？在20世紀期間，地球溫度大約升了華

15、1氏度。這個數(shù)值對你我來說很可能是無所謂的，但是跟其他自然變化相比較而言，這卻是一種快速的增長。那么，這種溫度的增長是怎么產(chǎn)生的呢？會產(chǎn)生什么影響呢？“關愛地球”組織的索菲阿姆斯特朗就在探究這些問題。 毫無疑問，地球是在變暖(見圖一)，而地球變暖正是人類活動導致的，并非是一種無規(guī)律的自然現(xiàn)象。圖1：18602000年長期平均溫度差所有的科學家都贊同這種觀點：人們?yōu)榱松a(chǎn)能量而燃燒化石燃料(如煤、天然氣和石油等)，從而引起了地球溫度的升高。這個升溫過程的一些副產(chǎn)品就叫做“溫室”氣體，其中最重要的就是二氧化碳。賈尼絲福斯特博士解釋說：“有一種科學家稱之為溫室效應的自然現(xiàn)象。這種現(xiàn)象的發(fā)生是因為在大

16、氣層中少量的氣體(如二氧化碳、甲烷、水蒸汽等)吸收太陽的熱量，從而使地球變暖。如果沒有這種溫室效應，地球的溫度將比現(xiàn)在的溫度還要低33攝氏度左右。因此，我們需要這些氣體。當我們的大氣層中增加了大量額外的二氧化碳時，問題就來了。這意味著更多的熱量要被困在大氣層中，從而引起全球溫度上升?！?我們知道，在過去100150年期間，二氧化碳的含量急劇增加了。有一位名叫查爾斯基林的科學家曾經(jīng)把19571997年期間大氣層中二氧化碳的含量作了精確的統(tǒng)計。他發(fā)現(xiàn)，在這些年里，大氣層中的二氧化碳含量從315/1000 000上升到370/1000 000。(見圖二) 所有科學家都接受這個數(shù)據(jù)。他們還贊同下述觀點

17、，正是由于越來越多地燃燒化石燃料導致了二氧化碳的增加。那么氣溫會升多高？福斯特博士說，在今后的100年里，全球變暖的量可能低到11.5攝氏度，但是也有可能會高達5攝氏度。圖2：19571997年大氣中的二氧化碳含量 然而，科學家們在對待升溫的態(tài)度上卻是大不相同的。一方面，福斯特博士認為氣溫升高5度的趨勢可能是一場大災難。她說：“對于未來的氣候，我們不可能作出精確的預測，但是那時的天氣可能是很糟糕的?！蓖馑挠^點的其他科學家認為，全球變暖會導致海平面上升好幾米；也有人預言會出現(xiàn)嚴重的風暴、洪澇、干旱、饑荒、疫病和物種的滅絕。另一方面，還有一些人，像科學家喬治漢布利，反對上面的觀點，他們認為我們

18、不必擔心空氣中會有高含量的二氧化碳。他們預言說，變暖的情況不會很嚴重，對環(huán)境的影響也不會太壞。漢布利實際上是這樣說的：“二氧化碳含量的增加實際上是件好事。它使植物生長更快，莊稼產(chǎn)量更高，還會促進動物的生長所有這些都能改善人類的生活?！?溫室氣體繼續(xù)在大氣中聚集。即使我們開始減少二氧化碳和其他溫室氣體的含量，在(未來)幾十年或幾個世紀內，氣候仍會持續(xù)轉暖。沒有人知道全球變暖會帶來什么樣的影響。這是不是意味著我們不必采取任何措施呢？還是說，這樣不采取任何措施危險性會很大呢？二、將下列單詞或詞組譯成英語然后參閱Unit 4的詞匯表自主勘誤。1消費，消耗 v_2圖表 n_3現(xiàn)象 n_4資料，數(shù)據(jù) n_5趨勢 n_6大災難 n_7洪水 n_8溫和的 adj._9結果，后果 n_1consume2.graph3.phenomenon4.data5.tend6.catastrophe7.flood8.mild9.consequence10陳述，說明 v_11種類，范圍 n_12發(fā)生，造成_13同意，贊成，訂閱_14大量的_15上升，增長_16導致_17反對_18即使_e about13.subscribe to14.quantities of15.go up16.result in17.be opposed to18.even if