1、Class_Name:_Group:_Assessment:_Unit 4 Global Warming Period 1 reading Learning aims: 1. Know well the global warming2. Enable the students to talk about different sources of energy.Important point: Learning about effect the global warming brings human being.Difficult point: To improve the skills of
2、reading.使用说明及学法指导：1. 通过阅读课本P25-27，完成预习案。2. 完成时间：30分钟。预习案 Previewing CaseTask 1 Divide the text into 4 parts and match the idea of each part.Part 1(Para _) Two different attitudes among scientists towards global warming. Part 2 (Para _ to _) Whether people should do something about global warming or
3、not. Part 3 (Para _to _) How global warming comes about.Part 4 (Para _) Introduce a debate over the issue of global warming.Task 2 Careful readingPart 1 1) Who wrote the magazine article? What is the name of the magazine? _ _Part 2 2) What are graph 1 about?_3) What is the reason of the increase in
4、the earths temperature? _4) What will happen if we add quantities of carbon dioxide into the atmosphere?_Part 3: List Charls Keelings, Dr. Janice Fosters & George Hambley s the ideasCharls KeelingDr. Janice Foster George HambleyGraph2 shows that carbon dioxide content of the atmosphere 5)_From 1957
5、to 1997.Carbon dioxide has caused the global temperature to 6) _. An increase of five degrees would be a 7)_ and could be 8)_.More carbon dioxide is a 9)_ thing,which makes crops 10)_ more and will en-courage 11)_ _.Task 3 True or False (Finish P27 Comprehending 2)Task 4 语法填空There is no doubt that t
6、he earth is becoming 1 _(warm). But how has this come about and does it matter? People have fierce debates about whether 2 _is human activity that has caused this global warming, 3 _ (compare) with most of the natural changes. Many scientists 4 _Dr. Janice Foster believe that people have caused the
7、increase in the earths temperature 5 _ burning fossil fuels like coal, natural gas and oil to produce energy. Some byproducts of this process are called “greenhouse” gases, the most important one of 6 _is carbon dioxide. The increased amount of carbon dioxide means that more heat energy 7 _ (trap) i
8、n the atmosphere 8 _ (cause) the global temperature to go up. On the other hand, some scientists predict that any warming will be mild with few bad 9 _(environment) consequences. Anyhow, even if we start reducing 10 _ amount of carbon dioxide and other greenhouse gases, the climate is going to keep
9、on warming for decades or centuries.我的疑惑探究案 Exploring Case探究一Read and choose the best answer1. Whats the main idea of the article?A. It talks about different ideas of global warming B. It talks about the causes of global warmingC. It talks about the effects of global warming D. all the above2. In Pa
10、ra. 5 , “but it could be as high as 5 degrees” here “it ” refers to _A. the data B. the amount of global warming C. the burning o f fossil fuels D. the increased carbon dioxide3.Which statement is FALSE? _ A. During the 20th century, the temperature increased. B. Natural gas is s a byproduct of burn
11、ing fossil fuelsC. Between 1957 and 1997 Charls Keeling measured the amount of carbon dioxide in the atmosphere. D. Some scientists think if the amount of greenhouse gases continues to rise, we will face a global catastrophe.4.From the article, we can infer that _A. the earth has become warmer since
12、 early 20th century B. the increased carbon dioxide is the only reason for global warming C. some scientists think the sea level will rise as a result of global warming. D. The issue of global warming will continue to be discussed.探究二 难句翻译1. There is no doubt that the earth is becoming warmer and th
13、at it is human activity that has caused this global warming rather than a random but natural phenomenon. _2. All the scientists subscribe to the view that the increase in the earths temperature is due to the burning of fossil fuels like coal, natural gas and oil to produce energy_3.Without the green
14、house effect, the earth would be about thirty-three degrees Celsius cooler than it is. _探究三 Discussion :What are the effects of global warming? Please list effectsnegative effect:_positive effect :_训练案 Find these phrases in the text1 产生 _ 2毫无疑问_ 3 而不是 _ 4赞同 _ 5 因为;由于 _ 6 少量的气体 _ 7 大量的_8 容易被困_9 上升 _ 10 导致 _11 一方面 另一方面 ._12 反对 _ 13 更大范围的动物 _ 14 在大气中聚集 _15 持续变暖 _ 16 在未来的几十年和几个世纪内 _课后巩固 完成同步检测