《大气环境保护》沉浸式双语教案设计──高一地理上册第二章第七节

教学目标

1.了解大气污染所形成的全球变暖、臭氧层的破坏、酸雨等现象产生原因及危害；

2.正确认识大气环境保护的重要意义；

3.通过沉浸式双语讲授，学生在掌握地理知识的过程中，应用英语，提高英语应用能力。

教学重点

1.全球变暖

2.臭氧层的破坏和保护

3.酸雨的危害

教学难点

英语语境的建立与学科学习相结合

教学准备

多媒体课件

教学过程

1.introduction(导入新课)

showtothestudentsthepicturethattheearthissweatinglikeamanfeelingenormouslyhotinsummerandthepictureofantarcticholeofozonosphere，andwatchtheshortfilmaboutacidrain.(出示地球出汗的卡通片，南极臭氧空洞图片以及观看酸雨影片片段，指出全球大气环境已经受到严重的污染，所以本课要研究大气环境保护)

2.presentation（教授新课）

2.1.整体思路

guidethestudentstoknowthreeatmosphericproblems，eachprobleminstructedinthisway:first，whatcausestheproblem;secondly，whatharmfulaffectssuchproblembring;andfinally，measuresthatcanbetakentosolvetheproblem.(分别讲述大气环境的三大问题，每个问题的以如下方法呈现：一产生问题的原因；二是其危害，三应当采取的措施)

2.2具体教材双语的讲授。

2.2.1globalwarming

afterapicturethatshowthechangeofthetemperatureoftheearthinrecentyear，iputforwardaquestion:“isthetemperaturegoingupordown?thestudentsansweredandstudentsunderstandwhatis“globalwarming”.thenthestudentsdiscussedthecauseofglobalwarminginenglish，ilistenedtothemandhelpthemexpressthemselvesinenglish，finallyconclusionswerereachedaboutwhatthehumanshoulddotostoptheearthfromgettinghotter<inthissession，studentslistenedtoenglishspeakingandtheyspokeenglishindiscussionandeventheytriedtoexpresstheirideasinenglish.>

2.2.2theprotectionofozonelayer

atfirstashortenglishfilmshowhowthecfc“eat”theo3，thenwiththemorewidelyuseoftherefrigeratorthatusedcfc，antarcticholeofozonosphereappeared(comesthepictureofantarcticholeofozonosphere)afterthat，englishfilmshowharmfulaffectsaboutthedepletionofozonelayer.inthesameway，whattodotoprotectozonelayeristhelastthingforstudentstoknow.<englishfilmisgoodenvironmentforstudentstoimmersethemselvesinenglish.)

2.2.3acidrain

putforwardquestionafterquestiontofulfilltheinstructionofthecontent，suchasa)whatisacidrain;b)howitcomesintobeing;c)wheredoesacidrainfrequentlyhappend)whyacidrainisharmfule)whattodotoreduceacidrain.(inthissession，iestablishquestionforstudentstothinkabout，thenbypictureandfilmiletthestudentsanalyzetheproblemthemselves，andsolvetheproblemthemselves，inwhichtheyweretrainedtoanalyzefactstofindtheanswer，atthesametime，englishthinkingpatternisapplied.)共3页，当前第1页123