《大氣環(huán)境保護(hù)》沉浸式雙語(yǔ)教案設(shè)計(jì)──高一地理上冊(cè)第二章第七節(jié)(通用2篇)
《大氣環(huán)境保護(hù)》沉浸式雙語(yǔ)教案設(shè)計(jì)──高一地理上冊(cè)第二章第七節(jié) 篇1
教學(xué)目標(biāo)
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(xiàn)象產(chǎn)生原因及危害;
2.正確認(rèn)識(shí)大氣環(huán)境保護(hù)的重要意義;
3.通過(guò)沉浸式雙語(yǔ)講授,學(xué)生在掌握地理知識(shí)的過(guò)程中,應(yīng)用英語(yǔ),提高英語(yǔ)應(yīng)用能力。
教學(xué)重點(diǎn)
1.全球變暖
2.臭氧層的破壞和保護(hù)
3.酸雨的危害
教學(xué)難點(diǎn)
英語(yǔ)語(yǔ)境的建立與學(xué)科學(xué)習(xí)相結(jié)合
教學(xué)準(zhǔn)備
多媒體課件
教學(xué)過(guò)程
1.introduction (導(dǎo)入新課)
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,南極臭氧空洞圖片以及觀看酸雨影片片段,指出全球大氣環(huán)境已經(jīng)受到嚴(yán)重的污染,所以本課要研究大氣環(huán)境保護(hù))
2.presentation (教授新課)
2.1. 整體思路
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.(分別講述大氣環(huán)境的三大問(wèn)題,每個(gè)問(wèn)題的以如下方法呈現(xiàn):一產(chǎn)生問(wèn)題的原因;二是其危害,三應(yīng)當(dāng)采取的措施)
2.2 具體教材雙語(yǔ)的講授。
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 (課堂練習(xí))
我用英文設(shè)計(jì)了幾個(gè)單項(xiàng)選擇題和雙項(xiàng)選擇題復(fù)習(xí)鞏固學(xué)生所學(xué)的教學(xué)內(nèi)容,同時(shí)也通過(guò)作題,學(xué)生的英語(yǔ)閱讀理解能力得到了鍛煉。練習(xí)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 (課后練習(xí))
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?
____________________________________________________________________________
《大氣環(huán)境保護(hù)》沉浸式雙語(yǔ)教案設(shè)計(jì)──高一地理上冊(cè)第二章第七節(jié) 篇2
【確定教學(xué)目標(biāo)】
1.知識(shí)與技能目標(biāo):了解大氣污染所形成的地球保溫效應(yīng)、臭氧層的破壞、酸雨等環(huán)境問(wèn)題產(chǎn)生的原因、危害和保護(hù)(防治)。
2.過(guò)程與方法目標(biāo):應(yīng)用課本上的地圖,比較分析環(huán)境問(wèn)題產(chǎn)生的原因、危害和解決的途徑,從而培養(yǎng)學(xué)生讀圖能力,并提高發(fā)現(xiàn)問(wèn)題的能力。
3.情感、態(tài)度、價(jià)值觀目標(biāo):通過(guò)學(xué)習(xí)使學(xué)生認(rèn)識(shí)環(huán)境保護(hù)的意義,并樹立“從小做起,從我做起”的環(huán)境保護(hù)意識(shí)和“全球意識(shí)”。
【設(shè)計(jì)教學(xué)方式】
環(huán)境問(wèn)題的教學(xué)以“成因、后果、措施”為主要的教學(xué)線索來(lái)進(jìn)行,通過(guò)學(xué)生的自主探究和教師的引導(dǎo)作用來(lái)達(dá)到教學(xué)目標(biāo)的落實(shí)。
1.通過(guò)投影漫畫“地球出汗了”這一例子,引導(dǎo)學(xué)生思考和討論:地球?yàn)槭裁磿?huì)出汗?大氣出現(xiàn)了什么問(wèn)題了?
2.通過(guò)材料“我國(guó)科學(xué)家近年來(lái)也發(fā)現(xiàn),在世界屋脊──青藏高原上空也存在臭氧濃度的大幅度下降現(xiàn)象”,引導(dǎo)學(xué)生思考和討論:臭氧為什么會(huì)減少?臭氧層破壞會(huì)造成什么危害?我們應(yīng)如何去保護(hù)臭氧層?
3.通過(guò)材料“在北美和加拿大綿延數(shù)千里的森林正在消亡,成千上萬(wàn)的湖泊正在干涸,酸雨正落在廣袤的荒野上;在瑞典,4000個(gè)湖泊因酸度太高,魚類無(wú)法生存;在美國(guó)佛蒙特州和紐約州,60%的高海拔紅云杉已消失”,引導(dǎo)學(xué)生思考和討論:酸雨是怎樣形成的?有哪些危害?怎樣防治?
【落實(shí)教學(xué)內(nèi)容】
(一)全球變暖
1.成因:人類活動(dòng)排入大氣中的二氧化碳強(qiáng)烈吸收地面紅外線長(zhǎng)波輻射;自然原因。
2.后果:海平面上升,影響世界各地降水和干濕狀況的變化,導(dǎo)致世界各地經(jīng)濟(jì)結(jié)構(gòu)的變化。
3.措施:減少二氧化碳的排放;提高能源利用技術(shù)和效率,采用新能源;加強(qiáng)國(guó)際間的合作。
(二)臭氧層的破壞與保護(hù)
1.成因:太陽(yáng)活動(dòng)的影響;人類使用消耗臭氧物質(zhì)。
2.后果:到達(dá)地面的太陽(yáng)紫外線輻射增加,直接危害人類健康,對(duì)生態(tài)環(huán)境和農(nóng)林牧業(yè)造成破壞。
3.措施:減少并逐步禁止氟氯烴等消耗臭氧層物質(zhì)的排放,積極研制新型制冷系統(tǒng);參與國(guó)際保護(hù)臭氧層合作。
(三)酸雨的危害與防治
1.成因:由于燃燒煤、石油、天然氣等,不斷向大氣中排放二氧化硫和氧化氮等酸性氣體所致。
2.后果:使河湖水酸化,影響魚類、森林和農(nóng)作物生長(zhǎng),腐蝕建筑物和文物古跡,危及人類健康。
3.措施:減少人為硫氧化物和氮氧化物排放是根本途徑;研究煤炭中硫資源的綜合開(kāi)發(fā)利用是有效措施。具體措施:1)制定嚴(yán)格的大氣環(huán)境質(zhì)量標(biāo)準(zhǔn),限制固定污染源和汽車污染源的排放量,加強(qiáng)排放控制地的管理。2)調(diào)整能源結(jié)構(gòu),增加無(wú)污染或少污染的能源比例,發(fā)展太陽(yáng)能、核能、水能、風(fēng)能、地?zé)崮艿炔划a(chǎn)生酸雨污染的能源。3)積極開(kāi)發(fā)利用煤炭的新技術(shù),推廣煤炭的凈化技術(shù)、轉(zhuǎn)化技術(shù),改進(jìn)燃煤技術(shù),改進(jìn)污染物控制技術(shù),采取煙氣脫硫、脫氮技術(shù)等重大措施。4)加強(qiáng)大氣污染的監(jiān)測(cè)和科學(xué)研究,及時(shí)掌握大氣中的硫氧化物和氮氧化物的排放和遷移狀況,了解酸雨的時(shí)空變化情況和發(fā)展趨勢(shì),以便及時(shí)采取對(duì)策。5)調(diào)整工業(yè)布局,改造污染嚴(yán)重的企業(yè),改進(jìn)生產(chǎn)技術(shù),提高能源利用率,減少污染排放量。
【課堂練習(xí)鞏固】
1.引起全球氣溫升高的因素是:
a.工廠、交通工具、家庭爐灶大量燃燒煤、石油、天然氣
b.耕地面積不足,林區(qū)開(kāi)辟梯田
c.工業(yè)生產(chǎn)和家庭廣泛使用冰柜和電冰箱
d.沿海填海造陸
e.城市交通用地限制征用耕地面積
f.跨流域調(diào)水,調(diào)節(jié)地表徑流
h.引水灌溉,改造沙漠、戈壁灘、石山
g.過(guò)分抽取地下水
[答案]a,b,c。
2.根據(jù)全球觀測(cè)資料分析,(如右圖),請(qǐng)判斷近百年全球氣溫的變化趨勢(shì),并分析原因。
[答案]近百年全球氣溫有變暖的趨勢(shì)。在上圖所示的100多年間,地球氣溫雖然有波動(dòng),但整體呈上升趨勢(shì)。20世紀(jì)80年代氣溫上升加速,最后幾十年成為近百年最熱的年份。原因:氣候變暖的原因是多方面的。除了自然方面的原因,主要是人為方面的原因,人為原因表現(xiàn)為城市化、森林砍伐、過(guò)度放牧、土地不合理利用,以及工業(yè)化原因引起大氣中co2等溫室氣體濃度增加等!
3.對(duì)全球變暖的趨勢(shì),ipcc(全球政府間氣候變化委員會(huì))提出了三種不同的預(yù)案,其氣溫變化趨勢(shì)如右圖所示。據(jù)此回答下列問(wèn)題:
(1)按a預(yù)案,全球自xx年起,平均氣溫每xx年將升高約 ℃;至21xx年,按b預(yù)案和c預(yù)案,全球平均氣溫將比a預(yù)案分別低 ℃和 ℃。
(2)用直線將三種預(yù)案與其相應(yīng)的能源消費(fèi)結(jié)構(gòu)連接起來(lái)。
a.預(yù)案 天然氣廣泛取代煤
b.預(yù)案 維持能源消費(fèi)結(jié)構(gòu)的現(xiàn)狀
c.預(yù)案 可再生能源取代煤、石油、天然氣等
(3)簡(jiǎn)述全球變暖對(duì)生態(tài)環(huán)境的主要影響。
(4)為實(shí)現(xiàn)可持續(xù)發(fā)展,解決全球變暖需遵循的最主要原則是什么?為什么?
[答案]
。1)0.30-0.32;1.1-1.5;1.6-2
。2)
。3)海平面上升;引起世界各地區(qū)降水和干濕狀況的變化。
。4)共同性原則。這是一個(gè)全球性問(wèn)題(或跨國(guó)界問(wèn)題);必須進(jìn)行國(guó)際合作。