《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（通用2篇）
《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 篇1
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)
show to the students the picture that the earth is sweating like 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
guide the students to know three atmospheric problems， each problem instructed 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。
2.2.1 global warming
after a picture that show the change of the temperature of the earth 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 conclusions were reached about what the human should do to stop the earth from getting hotter < in this session， students listened to english speaking and they spoke english in discussion and even they tried to express their ideas in english.>
2.2.2 the protection of ozone layer
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 ozonosphere) 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. )
2.2.3 acid rain
put forward question after question to fulfill 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 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 （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.choose the right answer from a， b， c and d（there is only answer that is right）.
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 rain
2)deforestation will result in the increase of_______.
a.carbon dioxide b. carbon oxide
c.sulfur dioxide d. cfc
3)apart from the natural factors that damage the ozonosphere， the human being’s break-down of ozone mainly refers to _______.
a.the release of carbon oxide b. the release of carbon dioxide
c.the release of cfc d. the release of nitrogen oxide
4)in the atmosphere， ozonosphere lies in the ______.
a.troposphere b. stratosphere c. mesosphere d. hydrosphere
5)the acid rain in china is mainly sulfated acid rain because _____.
a.we burn wood for main energy
b.we burn coal for main energy
c.we have power station propelled by fire
d.our power station propelled by water
2.choose the two right answers from a， b， c 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 station
c.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 rainfall and less evaporation
c.ocean water expand due to the increase of temperature
d.melted polar ice makes the sea level rise
3)the damage of the ozonosphere result in _______.
a.more people will have skin cancer
b.rainstorms in the whole world
c.global drought
d.damage of the ecologic environment and agriculture
4)the gases that will form acid rain are _______.
a.carbon dioxide b. sulfur dioxide
c.nitrogen oxide d. carbon oxide
5)the affects that acid rain result in are _______.
a.acidify the soil
b.more people get skin cancer
c.acidify water in the rivers and cause fish to die
d. decay in buildings and culture relics
4.homework (课后练习)
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)what’s the artificial reason that makes the air temperature rise?
______________________________________________________________________________
9)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 carbon dioxide?
______________________________________________________________________________
______________________________________________________________________________
part 2 the damage and protection of ozonosphere
13)what’s 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 rain
16) what is generally called acid rain?
______________________________________________________________________________
17) how does acid rain coming into being?
___________________________________________________________________________
18) why is acid rain in china sulfated?
______________________________________________________________________________
19) in what part of china do the areas have been changed into acid rain areas?
_____________________________________________________________________________
20) what are the harmful affects of acid rain?
_____________________________________________________________________________
_____________________________________________________________________________
21) how can we prevent and control acid rain?
____________________________________________________________________________
《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 篇2
【确定教学目标】
1.知识与技能目标：了解大气污染所形成的地球保温效应、臭氧层的破坏、酸雨等环境问题产生的原因、危害和保护（防治）。
2.过程与方法目标：应用课本上的地图，比较分析环境问题产生的原因、危害和解决的途径，从而培养学生读图能力，并提高发现问题的能力。
3.情感、态度、价值观目标：通过学习使学生认识环境保护的意义，并树立“从小做起，从我做起”的环境保护意识和“全球意识”。
【设计教学方式】
环境问题的教学以“成因、后果、措施”为主要的教学线索来进行，通过学生的自主探究和教师的引导作用来达到教学目标的落实。
1.通过投影漫画“地球出汗了”这一例子，引导学生思考和讨论：地球为什么会出汗？大气出现了什么问题了？
2.通过材料“我国科学家近年来也发现，在世界屋脊──青藏高原上空也存在臭氧浓度的大幅度下降现象”，引导学生思考和讨论：臭氧为什么会减少？臭氧层破坏会造成什么危害？我们应如何去保护臭氧层？
3.通过材料“在北美和加拿大绵延数千里的森林正在消亡，成千上万的湖泊正在干涸，酸雨正落在广袤的荒野上；在瑞典，4000个湖泊因酸度太高，鱼类无法生存；在美国佛蒙特州和纽约州，60%的高海拔红云杉已消失”，引导学生思考和讨论：酸雨是怎样形成的？有哪些危害？怎样防治？
【落实教学内容】
（一）全球变暖
1.成因：人类活动排入大气中的二氧化碳强烈吸收地面红外线长波辐射；自然原因。
2.后果：海平面上升，影响世界各地降水和干湿状况的变化，导致世界各地经济结构的变化。
3.措施：减少二氧化碳的排放；提高能源利用技术和效率，采用新能源；加强国际间的合作。
（二）臭氧层的破坏与保护
1.成因：太阳活动的影响；人类使用消耗臭氧物质。
2.后果：到达地面的太阳紫外线辐射增加，直接危害人类健康，对生态环境和农林牧业造成破坏。
3.措施：减少并逐步禁止氟氯烃等消耗臭氧层物质的排放，积极研制新型制冷系统；参与国际保护臭氧层合作。
（三）酸雨的危害与防治
1.成因：由于燃烧煤、石油、天然气等，不断向大气中排放二氧化硫和氧化氮等酸性气体所致。
2.后果：使河湖水酸化，影响鱼类、森林和农作物生长，腐蚀建筑物和文物古迹，危及人类健康。
3.措施：减少人为硫氧化物和氮氧化物排放是根本途径；研究煤炭中硫资源的综合开发利用是有效措施。具体措施：1）制定严格的大气环境质量标准，限制固定污染源和汽车污染源的排放量，加强排放控制地的管理。2)调整能源结构，增加无污染或少污染的能源比例，发展太阳能、核能、水能、风能、地热能等不产生酸雨污染的能源。3)积极开发利用煤炭的新技术，推广煤炭的净化技术、转化技术，改进燃煤技术，改进污染物控制技术，采取烟气脱硫、脱氮技术等重大措施。4)加强大气污染的监测和科学研究，及时掌握大气中的硫氧化物和氮氧化物的排放和迁移状况，了解酸雨的时空变化情况和发展趋势，以便及时采取对策。5)调整工业布局，改造污染严重的企业，改进生产技术，提高能源利用率，减少污染排放量。
【课堂练习巩固】
1.引起全球气温升高的因素是：
a.工厂、交通工具、家庭炉灶大量燃烧煤、石油、天然气
b.耕地面积不足，林区开辟梯田
c.工业生产和家庭广泛使用冰柜和电冰箱
d.沿海填海造陆
e.城市交通用地限制征用耕地面积
f.跨流域调水，调节地表径流
h.引水灌溉，改造沙漠、戈壁滩、石山
g.过分抽取地下水
[答案]a，b，c。
2.根据全球观测资料分析，(如右图)，请判断近百年全球气温的变化趋势，并分析原因。
[答案]近百年全球气温有变暖的趋势。在上图所示的100多年间，地球气温虽然有波动，但整体呈上升趋势。20世纪80年代气温上升加速，最后几十年成为近百年最热的年份。原因：气候变暖的原因是多方面的。除了自然方面的原因，主要是人为方面的原因，人为原因表现为城市化、森林砍伐、过度放牧、土地不合理利用，以及工业化原因引起大气中co2等温室气体浓度增加等。
3.对全球变暖的趋势，ipcc(全球政府间气候变化委员会)提出了三种不同的预案，其气温变化趋势如右图所示。据此回答下列问题：
(1)按a预案，全球自xx年起，平均气温每xx年将升高约 ℃；至21xx年，按b预案和c预案，全球平均气温将比a预案分别低 ℃和 ℃。
(2)用直线将三种预案与其相应的能源消费结构连接起来。
a.预案 天然气广泛取代煤
b.预案 维持能源消费结构的现状
c.预案 可再生能源取代煤、石油、天然气等
(3)简述全球变暖对生态环境的主要影响。
(4)为实现可持续发展，解决全球变暖需遵循的最主要原则是什么?为什么?
[答案]
（1）0.30－0.32；1.1－1.5；1.6－2
（2）
（3）海平面上升；引起世界各地区降水和干湿状况的变化。
（4）共同性原则。这是一个全球性问题(或跨国界问题)；必须进行国际合作。
