地理教案－大气环境保护教学设计

大气环境保护教案设计

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.)
3.exercises(课堂练习)
我用英文设计了几个单项选择题和双项选择题复习巩固学生所学的教学内容,同时也通过作题,学生的英语阅读理解能力得到了锻炼。练习如下:
1.ChoosetherightanswerfromA,B,CandD(thereisonlyanswerthatisright).
&nbs您现在访问的是中国学科吧旗下教案网http://www.jsfw8.com/jafs/

p;1)Carbondioxideisthemain_______intheatmosphere.
A.gasthatcanformacidrain
B.greenhousegas
C.gasthatwilldamagetheozonosphere
D.gasthatcanformcloudtorain
2)Deforestationwillresultintheincreaseof_______.
A.carbondioxideB.carbonoxide
C.sulfurdioxideD.CFC
3)Apartfromthenaturalfactorsthatdamagetheozonosphere,thehumanbeing’sbreak-downofozonemainlyrefersto_______.
A.thereleaseofcarbonoxideB.thereleaseofcarbondioxide
C.thereleaseofCFCD.thereleaseofnitrogenoxide
4)Intheatmosphere,ozonosphereliesinthe______.
A.troposphereB.stratosphereC.mesosphereD.hydrosphere
5)TheacidraininChinaismainlysulfatedacidrainbecause_____.
A.weburnwoodformainenergy
B.weburncoalformainenergy
C.wehavepowerstationpropelledbyfire
D.ourpowerstationpropelledbywater
2.choosethetworightanswersfromA,B,CandD.
1)Theartificialreasonsfortheincreaseofcarbondioxideintheatmosphereare_____.
A.burningoffossilfuels
B.constructionofpowerstation
C.deforestation
D.theseaispolluted
2)Thedirectreasonsforglobalwarmingtoraisethesealevelare______.
A.therewillbemorerivers
B.morerainfallandlessevaporation
C.oceanwaterexpandduetotheincreaseoftemperature
D.meltedpolaricemakesthesealevelrise
3)Thedamageoftheozonosphereresultin_______.
A.morepeoplewillhaveskincancer
B.rainstormsinthewholeworld
C.globaldrought
D.damageoftheecologicenvironmentandagriculture
4)Thegasesthatwillformacidrainare_______.
A.carbondioxideB.sulfurdioxide
C.nitrogenoxideD.carbonoxide
5)Theaffectsthatacidrainresultinare_______.
A.acidifythesoil
B.morepeoplegetskincancer
C.acidifywaterintheriversandcausefishtodie
D.decayinbuildingsandculturerelics
4.homework(课后练习)
Answerthefollowingquestionsaccordingtothetext:
Part1globalwarming:
6)Whatarethemainproblemsofatmosphericenvironmenttoday?
______________________________________________________________________________
7)Istheglobalwarmingonlyduetonaturalreasons?
_____________您现在访问的是中国学科吧旗下教案网http://www.jsfw8.com/jafs/

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8)What’stheartificialreasonthatmakestheairtemperaturerise?
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9)Inwhatwayscanthehumanbeingsincreasecarbondioxideintheatmosphere?
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10)Howdoesthesealevelrise?(therearetwoways,whatarethey?)
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11)Whatwillbeaffectedwhentherainfallandhumidityconditionsaroundtheworldchange?
12)Whatarethemeasurestoreducetheamountofreleasedcarbondioxide?
______________________________________________________________________________
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Part2thedamageandprotectionofozonosphere
13)What’stheartificialreasonforthereductionoftheamountofozoneinthestratosphere?
______________________________________________________________________________
14)Iftheamountofultravioletraysreachingtheearthsurfaceincreases,whataretheharmfulaffects?
__________________________________________________________________________________
15)Whatcanwedotoprotecttheozonosphere?
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Part3thedamageandpreventionofacidrain
16)Whatisgenerallycalledacidrain?
______________________________________________________________________________
17)Howdoesacidraincomingintobeing?
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18)WhyisacidraininChinasulfated?
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19)InwhatpartofChinadotheareashavebeenchangedintoacidrainareas?
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20)Whataretheharmfulaffectsofacidrain?
_____________________________________________________________________________
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21)Howcanwepreventandcontrolacidrain?您现在访问的是中国学科吧旗下教案网http://www.jsfw8.com/jafs/