1、Book 6 Unit 4 Global Warming Learning & teaching aims: 1. To develop some reading abilities.2.To learn about the main information of the passage.3.To develop the sense of environmental protection.课前预习：1.化石燃料 _ 2.副产品_3.温室效应 _ 4.温室气体_5.甲烷，沼气_ 6.自然现象_7.发生; 造成_ 8.大量的_9.上升; 增长; 升起 _ 10.导致_11.同意; 赞成; 订购 _
2、 12.反对_13.增加，聚集_ 14.继续_课内探究I. Warming-up；Pre-readingII. Scanning: 1. What is mainly discussed in the passage?A. What has caused the global warming and whether it matters.B. What effects of the global warming will be.C. How serious the global warming could be.D. What the global warming is2. Where doe
3、s this article most probably come from?A. Newspaper B. Novel C. Magazine 3.What are the two graphs about?4.Find out the topic sentence of each paragraph5.Match the main idea of each part.Part1(Para 1) How global warming comes about?Part2(Para 2&5) Two different opinions about global warming.Part3 (p
4、ara6) Should we do anything?Part4 (Para 7) The earth is becoming warmer.III. Skimming and answering the following questions.1.Who found out the amount of carbon dioxide in the atmosphere from 1957 to 1977?A. Dr Janice Foster B. Charles KeelingC. George Hambley D. Sophie Armstrong2.Which of the follo
5、wing is NOT true according to the passage?A. The temperature in the last century didnt seem to increase much.B. Everyone believes that global warming caused by the activities of humans.C. The rise in carbon dioxide is causing a steady increase in global warming.D Janice Forster believes that she can
6、 predict future global rise in temperature.IV. Careful Reading Part1 1.Who wrote the magazine article? 2. What is the name of the magazine?3. Whats the meaning of the word “explore” in Line.4? 4.The purpose of the first paragraph is to _. A .introduce the writer B. explain a changeC. introduce the t
7、opic D. raise a questionpart 2 1.What is the cause of global warming?2.Who is to blame for the global warming? Human activity? Or natural phenomenon?3. The graphs are used to _.A. illustrate points by providing evidence B. tell the change of temperatureC. tell the content of carbon dioxide in the ai
8、r D. interest the readers4.Fill in the blanks about the causes of Greenhouse effect.Greenhouse effect is a natural p . Greenhouse gases in the atmosphere can warm the earth by trapping heat energy. But the problem begins when we add huge quantities of extra carbon dioxide to the atmosphere by burnin
9、g fossil f . Therefore, more heat energy is t in the atmosphere. It is the increased amount of carbon dioxide that is r in global warming.Part3 (Para.6): two different attitudesBad effects Good effectsV.SummaryThere is no 1 that the earth is becoming warmer no matter whether is a natural 2 _ . Scien
10、tists believe that “ greenhouse effect” begins when we add huge 3 Extra carbon dioxide to the atmosphere by burning 4 . The increased 5 . carbon dioxide is causing the 6 temperature to go up.Scientists also agree that the burning of more and more fossil fuels has 7 This increase in carbon dioxide. A
11、n increase of five degrees would be a 8 . Scientists cant predict the 9 well enough to know what to expect.On the other hand, a scientist ,George Hambley predicts that any warming will be mild with few bad environmental 10 . He 11 that more carbon dioxide will encourage a greater 12 of animals- all of which will make life for humans better. However, greenhouse gases continue to 13 in the atmosphere and the climate is going to 14 warming.VI. Debate:What should we about global warming?VII. Write a short passage about what we should do to save the earth. :
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