1、大氣環境保護沉浸式雙語教案設計人教版高一地理上冊第二章第九節葉曉霞 （廣東省東莞市東華中學 523128）教學目標：1了解大氣污染所形成的全球變暖、臭氧層的破壞、酸雨等現象產生原因及 危害；2 正確認識大氣環境保護的重要意義；3 通過沉浸式雙語講授，學生在掌握地理知識的過程中，應用英語，提高英語應用能力；教學重點：1）全球變暖 2）臭氧層的破壞和保護 3）酸雨的危害教學難點：英語語境的建立與學科學習相結合教學準備：多媒體課件教學過程：1Introduction (導入新課)Show to the students the picture that the earth is sweating l

2、ike a man feeling enormously hot in summer and the picture of Antarctic hole of ozonosphere, and watch the short film about acid rain. (出示地球出汗的卡通片,南極臭氧空洞圖片以及觀看酸雨影片片段，指出全球大氣環境已經受到嚴重的污染，所以本課要研究大氣環境保護)2 presentation （教授新課）2.1. 整體思路Guide the students to know three atmospheric problems, each problem inst

3、ructed in this way: first, what causes the problem; secondly, what harmful affects such problem bring; and finally, measures that can be taken to solve the problem.(分別講述大氣環境的三大問題，每個問題的以如下方法呈現：一產生問題的原因；二是其危害，三應當采取的措施)2.2 具體教材雙語的講授。After a picture that shows the change of the temperature of the earth

4、in recent year, I put forward a question: “Is the temperature going up or down? The students answered and students understand what is “global warming”. Then the students discussed the cause of global warming in English, I listened to them and help them express themselves in English, finally conclusi

5、ons were reached about what the human should do to stop the earth from getting hotter At first a short English film show how the CFC “eat” the O3, then with the more widely use of the refrigerator that used CFC, Antarctic hole of ozonosphere appeared(comes the picture of Antarctic hole of ozonospher

6、e) after that, English film show harmful affects about the depletion of ozone layer. In the same way, what to do to protect ozone layer is the last thing for students to know. English film is good environment for students to immerse themselves in English. ) put forward question after question to ful

7、fill the instruction of the content, such as a) what is acid rain; b)how it comes into being; c) where does acid rain frequently happen d)why acid rain is harmful e)what to do to reduce acid rain. ( In this session, I establish question for students to think about, then by picture and film I let the

8、 students analyze the problem themselves, and solve the problem themselves, in which they were trained to analyze facts to find the answer, at the same time, English thinking pattern is applied. )3 exercises （課堂練習）我用英文設計了幾個單項選擇題和雙項選擇題復習鞏固學生所學的教學內容，同時也通過作題，學生的英語閱讀理解能力得到了鍛煉。練習如下：1Choose the right answ

9、er from A, B, C and D: 1) Carbon dioxide is the main _in the atmosphere.A. gas that can form acid rain B. greenhouse gas C. gas that will damage the ozonosphere D. gas that can form cloud to rain2) Deforestation will result in the increase of_.A. carbon dioxide B. carbon oxide C. sulfur dioxide D. C

10、FC3) Apart from the natural factors that damage the ozonosphere, the human beings break-down of ozone mainly refers to _. A. the release of carbon oxide B. the release of carbon dioxideC. the release of CFC D. the release of nitrogen oxide4) In the atmosphere, ozonosphere lies in the _.A. tropospher

11、e B. stratosphere C. mesosphere D. hydrosphere5) The acid rain in China is mainly sulfated acid rain because _.A. we burn wood for main energy B. we burn coal for main energyB. we have power station propelled by fire D. our power station propelled by water2. choose the two right answers from A, B, C

12、 and D:1) The artificial reasons for the increase of carbon dioxide in the atmosphere are:_.A. burning of fossil fuels B. construction of power stationC. deforestation D. the sea is polluted 2) The direct reasons for global warming to raise the sea level are:_.A. there will be more rivers B. more ra

13、infall and less evaporationB. ocean water expand due to the increase of temperatureC. melted polar ice makes the sea level rise3) The damage of the ozonosphere result in _.A. more people will have skin cancer. B. rainstorms in the whole worldB. global drought D. damage of the ecologic environment an

14、d agriculture4) The gases that will form acid rain are:_.A. carbon dioxide B. sulfur dioxide C. nitrogen oxide D. carbon oxide5) The affects that acid rain result in are:_.A. acidify the soil B. more people get skin cancer B. acidify water in the rivers and cause fish to die. D. decay in buildings a

15、nd culture relics.4. homework (課后練習)Answer the following questions according to the text: Part 1 global warming:6) What are the main problems of atmospheric environment today?_7) Is the global warming only due to natural reasons?_8) Whats the artificial reason that makes the air temperature rise?_9)

16、 In what ways can the human beings increase carbon dioxide in the atmosphere?_10) How does the sea level rise? (there are two ways, what are they?)_11) What will be affected when the rainfall and humidity conditions around the world change? _12) What are the measures to reduce the amount of released

17、 carbon dioxide?_Part 2 the damage and protection of ozonosphere13) Whats the artificial reason for the reduction of the amount of ozone in the stratosphere? _14) If the amount of ultraviolet rays reaching the earth surface increases, what are the harmful affects? _15) What can we do to protect the ozonosphere? _ _Part 3 the damage and prevention of acid rain16) What is generally cal