学人教版选修6 unit4 Global Warmingreading教案 (8).doc

unit4. the earth is becoming warmer-but does it matter 教案teaching aims:1. improve the students reading ability2. having concept of “greenhouse gases”,”greenhouse effect”global warming”3. know scientists attitude towards “global warming”4. can write down the advantages as well as disadvantages of “global warming” and can express them to the whole classteaching important and difficult points:1. how to improve the students reading ability2. how to guide students to write and to express his or her attitude in own wordsemotional aims:enable the students to know the importance of protecting earthmedia preparation:blackboards, ppt, video player, mp3 playerteaching process:step1. greetingsgreet the whole classstep2. lead-inshow three groups of pictures, which are about shallow understanding of “global warming”, and let them choose the right picture of each group. eg.which of the following picture doesnt show the phenomenon?step3. fast-readingmatch: the main idea of each paragraph. (divided them into seven groups,each group answer one paragraph.)step4. intensive reading1) analyze paragraph1 and paragraph2 in a way of graph1. answer two questions.what is this graph about? what has caused this phenomenon?2) listen to paragraph3 and then discuss questions in group to choose right answer.greenhouse gases refer to _. a. carbon dioxide b. the burning of fossil fuels c. byproducts of the burning of fossil fuels d. coal, natural gas and oilgreenhouse effect _. a. is a natural phenomenon b. happens when theres too much carbon dioxide c. does great harm to human beings d. makes life for human beings bettersummarize this paragraph in a way of simple drawing.3) give a graph2, ask one student to analyze the graph2 as the way of graph1. then combined with paragraph4 and paragraph5, judge t or f.the carbon dioxide content in the air increased by 70 parts per million from 1957 to 1997. all scientists accept the data in graph 2 except charles keeling.4) read paragraph6 together and summarize the different attitudes towards global warming.dr.foster: it would lead to a catastrophe.george hambly: we should not worry about it.5) read paragraph7 independently and answer questions. if we start reducing the amount of carbon dioxide and other greenhouse gases, is the climate going to stop? whats the attitude of the author? positive?negative or neutral?6) summarize the structure of the whole passagepart1 (paragraph1)part2 (paragraph2-5)part3 (paragraph6)part4 (paragraph7)step 5 writing write down the advantage or disadvantage of global warming in your opinion.step 6 play a video to express my view.step7 homeworksurf the internet for more information about global warming.teaching reflectglobal warming is one