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Book6 Unit4 Global warming 导学案（Period One: Reading）课前案Skim the text and finish the following information.1.What’s the main topic of the passage?The main topic of the passage is about .2.Who wrote the magazine article? What is the name of the magazine?wrote the magazine article; the name of the magazine is .3.What are the names of the three scientists mentioned in the article?The names of the three scientists mentioned in the article are , , and .Do they agree with one another? .4.The passage can be divided into three sections, match them with the main idea of each section.Part1.(1) A. How global warming comes aboutPart2. (2-5) B. List two different attitudes towards global warmingPart3. (6) C. Introduction of global warmingPart4. (7) D. Whether people should do something about global warming课中案学习目标:1.To learn some important words and phrases about global warming.2.To develop the reading skills by skimming and scanning the passage.3.To strengthen the awareness of environment protection .Step 1 Fast readingRead the text quickly and choose the best answers.1. How much did the temperature rise in the 1900s?A．One degree Fahrenheit. B．One Celsius.C．Two degrees. D．Thirty degrees Celsius.2.What causes the earth’s temperature increasing?A. Cutting treesB. Wasting the farmland.C. Running out of the river waterD. Burning fossil fuels.3.Which of the following is Dr. Janice F oster’s opinion?A. The result of the temperature increase will be serious.B. The amount of warming is nothing serious.C. We needn’t worry about high levels of carbon dioxide.D. Global warming is a natural phenomenon.4.According to George Hambley, .A. Global warming is a serious problem.B. There is no need to worry about global warming.C. The levels of CO2 in the air will become lower in the future.D. More animals will make greenhouse gases decrease.5. We can infer from the text that __________.A. the debate about the effects of global warming has not been settled.B. the greenhouse effect is the result of people’s actions.C. all scientists think it is important to reduce the amount of CO2 in the atmosphere.D. reducing greenhouse gases will immediately decrease the earth’s temperature. Step2 Careful reading Read Para.2 to Para.6 and fill in the blanks.(Para.2-Para.3)The reasons for global warminggreenhouse gases(Para.4-Para.5)The levels of carbon dioxide have increased greatly over the last . According to Dr.Charles Keeling, from to , the amount in the atmosphere wentup from around parts to around parts per millionDr.Janice Foster believes over the next century ,the amount of warming could be as lowas degrees Celsius, but it could also be as high as degrees.(Para.6)Different opinions about global warming.Dr. Foster(a catastrophe)George Hambley(a positive thing)1.a rise in2.severe storms, __________,__________, famines3.the spread of4.the disappearance of1.Plants will2.Crops will3.There will be a greater rangeofStep3 Further reading True or False（）1.The temperature in the last century seemed to increase much.（）2. Everyone believes that global warming is caused by the activities of humans.（）3. The rise in carbon dioxide is causing a steady increase in global warming.（）4. George Hambley believes that global warming will do good rather than harm to the earth.（）5. It is clear what the effects of global warming will be.Step 4 Fill in the blanks to retell the passage.The temperature of the earth 1 (rise) about one degree during the 20th century. How has this come 2 ? All scientists subscribe 3 the view that it is human activity 4 has caused the 5 (globe) warming rather 6 a random but natural phenomenon. Some scientists think we add large 7 (quantity) of carbon dioxide to the air. Some scientists believe the burning of more and more fossil fuels 8 (have) resulted in the increase of carbon dioxide. Greenhouse gases continue to build 9 . It may be a catastrophe but George 10 (state) that it is a positive thing.Step 5 Free talk — a short speech 能力提升Between the two opinions ,decide on one to have a discussion in you group and then choose a speaker to give a speech on behalf of your group. The following information may help you.Step 6 Summary课后案I.课外延伸阅读Further reading about global WarmingGlobal warming is the unusually rapid increase in Earth’s average surface temperature ove century primarily due to the greenhouse gases released as people burn fossil fuels. The global averagesurface temperature rose 0.6 to 0.9 degrees Celsius (1.1 to 1.6°F) between 1906 and 2005, and the rate of temperature increase has nearly doubled in the last 50 years. Temperatures are certain to go up further.Earth’s natural greenhouse effect Earth’s temperature begins with the Sun. Roughly 30 percent ofincoming sunlight is reflected back into space by bright surfaces like clouds and ice. Of the remaining 70percent, most is absorbed by the land and ocean, and the rest is absorbed by the atmosphere. The absorbedsolar energy heats our planet. As the rocks, the air, and the seas warm, they radiate “infrared radiation). From the surface, this energy travels into the atmosphere where much of it is absorbedby water vapor and long-lived greenhouse gases such as carbon dioxide and methane. When they absorbthe energy radiating from Earth’s surface, microscopic water or greenhouse gas molecules turn into tiny heaters— like the bricks in a fireplace, they radiate heat even after the fire goes out. They radiate in alldirections. The energy that radiates back toward Earth heats both the lower atmosphere and the surface,enhancing the heating they get from direct sunlight. This absorption and radiation of heat by the atmosphere—the natural greenhouse effect—is beneficial for life on Earth. If there were no greenhouseeffect, the Earth’saverage surface temperature would be a very chilly -18°C (0°F) instead of the comfortable 15°C (59°F) that it is today.What has scientists concerned now is that over the past 250 years, humans have been artificiallyraising the concentration of greenhouse gases in the atmosphere at an ever-increasing rate, mostly byburning fossil fuels, but also from cutting down carbon-absorbing forests. Since the Industrial Revolutionbegan in about 1750, carbon dioxide levels have increased nearly 38 percent as of 2009 and methanelevels have increased 148 percent.II.拓展提高书面表达如何解决全球变暖是我们全人类共同面临的一个难题。
单词1．consume v．消费，消耗；吃完；喝光Each year Americans consume a high percentage of the world's energy.每年美国人都消耗掉世界能源的很大比例。
This will consume his health, destroy his temper.这将损害他的健康，毁坏他的情绪。
How many rice did you consume last year?去年你们吃了多少大米？拓展：consumer n．消费者，用户，消费品consumer goods (家用)消费品consumers' association 消费者协会consumption n. 消费(量)，消耗(量)timeconsuming adj. 耗费时间的consuming adj. 消费的；强烈的例句：The ancient consumer city was now turned into a modern industrial base. 这个古老的消费城市今天已经变成了一个现代化的工业基地。
It's vital to impress the consumer with a good advertising campaign.进行广告宣传，使消费者熟悉产品，是至关重要的。
He has to cut down on the consumption of meat.他不得不减少吃肉。
Basketball is his consuming passion.篮球令他着迷。
练习：用consume的适当形式填空①We should adopt the ____________ suggestion.②Industrialized countries are _____________ 70% of the world's energy.③We have measured the car's fuel _____________.④She _____________ the big cake.Consumers’consuming consumption consumed2．subscribe vt.&vi.(1)捐助；捐赠He subscribed a large sum of money to charities.他向慈善团体捐赠了一大笔钱。
选修六unit 4（每日词汇）指人的名词educator[ˈedju:keitə]n.教育工作者；教育家记“意”笔记1：联想背过的单词education教育。
记“意”笔记2：e-向外，出现。
duc引导。
参考introduce介绍；conduct指挥，指导；product产品。
-ate动词后缀。
educate =（把内心的东西）向外引导出来= 教书育人= 教育。
educat-or 做教育的人。
environmentalist[inˌvaiərən'mentlist]n.环境保护论者记“意”笔记1: 联想背过的单词environment环境。
记“意”笔记2：en-进入。
viron-环绕。
-ment,-al,-ist都是后缀。
individual[ˌindiˈvidʒuəl]n.个人；个体记“意”笔记：in-进入；处于……状态。
divid-分开；分离。
-ual 形容词后缀。
in-divid-u-al = 处于分隔开的状态= 个体；个人。
指物的名词appliance[əˈplaiəns]n.用具；工具；器具记“意”笔记：联系单词apply 申请；应用。
变y为i, ance为名词后缀。
appliance = 应用的东西= 工具；用具；器具。
其他相关单词application 申请；应用。
applicant 申请人。
byproduct['baiˌprɔdʌkt]n.副产品记“意”笔记：by-随着；在……一边。
product 产品。
byproduct = 随着主产品出现的= 副产品。
其他相关单词passer-by 过路人。
can[kæn]n.容器；罐头记“意”笔记：can you can a can ? 你能装一个罐子吗？data[ˈdeitə]n.资料；数据记“意”笔记1：联想熟悉的组合big data 大数据。
database 数据库。
记“意”笔记2：比较date日期flood[flʌd]n.洪水；水灾记“意”笔记：fl-指水。
