广东省惠州市惠阳一中实验学校高中英语 Unit4 第1课时 reading学案 新人教版选修6.doc

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 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 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 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 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 the 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 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) in 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 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 para. 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 burning 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 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 that 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 greenhouse 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 effectsnegativ