2019-2020年九年級(jí)英語(yǔ)上冊(cè)《Unit2SavingtheEarth》Topic2（精編版）

1、素材和資料部分來(lái)自網(wǎng)絡(luò)，如有侵犯您的權(quán)益，請(qǐng)聯(lián)系文庫(kù)作刪除處理！2019-2020 年九年級(jí)英語(yǔ)上冊(cè) unit 2 saving the earthtopic 2sectionc教案 仁愛(ài)版the main activity is 1a.本課重點(diǎn)活動(dòng)是1a。. teaching aims and demands教學(xué)目標(biāo)1. learn some new words and phrases:on earth, period, millions of, take away, rise, level, refer to2. learn some useful sentences:(1) when i

2、t rains or when the wind blows, the earth is taken away.(2) the heat from the sun cant escape so the temperature is rising.3. learn to talk about the harm of pollution:(1) forests have bee deserts, so more and more sorts of animals and plants are disappearing.(2) as a result, many rivers and lakes a

3、re now dead.(3) too much harmfulradiationfrom thesun passes throughtheholeand reachesthe earth directly.(4) itcauses theleveloftheoceans toriseand theclimateofthe earthtochange.4. develop the students sense of environmental protection. teaching aids教具圖片 / 小黑板. five-finger teaching plan五指教學(xué)方案step 1 r

4、eview第一步復(fù)習(xí) ( 時(shí)間 :4 分鐘 )通過(guò)檢查作業(yè)， 引導(dǎo)學(xué)生開(kāi)拓思維，提出保護(hù)環(huán)境和水資源的具體措施，復(fù)習(xí)不定代詞和副詞。為學(xué)習(xí)新詞匯作準(zhǔn)備。( 檢查作業(yè)，并找學(xué)生匯報(bào)結(jié)果，引導(dǎo)學(xué)生如何保護(hù)水資源。) t:how do you protect our environment and save water?s1:everyone should plant more trees.s2:we should do everything we can to save water. s3:everybody should know the importance of forests. s4:pa

5、ss laws against water pollution.s5:collect and reuse waste water.step 2 presentation第二步呈現(xiàn)( 時(shí)間 :18 分鐘 )教師通過(guò)日常對(duì)話，借助1a 中的圖片，創(chuàng)設(shè)情景，導(dǎo)入新課，呈現(xiàn)新的詞匯。1. (教師由日常對(duì)話，引出本課話題，呈現(xiàn)部分新詞匯。) t:whats the weather like today?ss: it st:as we know, beijingoftenhas sandstormsinspring.what causes the bad weather? ss: cutting down

6、 too many trees.( 展示 1a 第二幅圖畫(huà)。 )t:yes. all over the world, people have cut down millions of trees. and trees bee fewer.( 板書(shū)并要求學(xué)生掌握。)- 1 - / 4millions oft:cutting down too many trees causes the bad weather. how can trees affect the weather?s1:they can keep water from running away.s2:they can stop s3:

7、t:yes. trees can stop the wind and water from taking the earth away.( 板書(shū)并要求學(xué)生掌握。) take away2. (繼續(xù)探討上述問(wèn)題，引出新詞匯。) t:anything else?( 如果沒(méi)有學(xué)生回答，繼續(xù)如下問(wèn)題。) t:whats the air like in the forest?ss: it s fresh. t:yes. why?ss: (允許學(xué)生用漢語(yǔ)回答。) 樹(shù)能吸收二氧化碳并釋放氧氣。t: that s right. trees can breathe in carbon dioxide and br

8、eathe out oxygen. ( 展示 1a 第五幅圖。 )please look at the picture.( 板書(shū)并要求學(xué)生理解。 ) carbon dioxide: co 2 oxygen: o 2t:where does co 2 e from? s4:animals breathing.s5:burning oil. for example, cars and buses.t:yes. they have pollutedtheair.carbon dioxideintheairhas increaseda lot. this has formed a“ blanket”

9、around the earth.( 板書(shū)并要求學(xué)生理解。 )blankett:the heat from the sun can t escape, so the temperature is rising. ( 板書(shū)并要求學(xué)生掌握rise；理解 escape 。)escape riset:this is called“ the greenhouse effect” .( 板書(shū)并要求學(xué)生理解。) the greenhouse effectt:what happens to the icebergs(冰川 )? ss: some parts of them change into water.

10、t:so it causes the level of the oceans to rise. ( 板書(shū)并要求學(xué)生掌握。)levelt:( 展示 1a 第 4 幅圖。 )please look at this picture. around the earth, there s a special kind of oxygen called“ ozone” .( 板書(shū)并要求學(xué)生理解。) ozone: o 3t:but now airpollutionisdestroyingitand thathas made a verybigholeinthe ozone layer.( 板書(shū)并要求學(xué)生理解

11、。)ozone layert:too much harmfulradiationfromthesun passes throughtheholeand reachesthe earth.( 板書(shū)并要求學(xué)生理解。)radiation3. (讓學(xué)生快速閱讀1a，用所給的詞組填空。完成1a。)t: we humans have lived on earth for only 35 000 years, but during this periodwe have changed our planeta lotinmany ways.now readthepassage and thenchoose a

12、 proper title for each paragraph from the phrases above the passage.( 板書(shū)并要求學(xué)生掌握。)on earth, period( 學(xué)生完成后與教師核對(duì)答案。)4. (教師出示小黑板上的問(wèn)題，讓學(xué)生再讀一遍課文后回答。)(1) have we changed our planet in many ways?(2) have people done good to the earth?(3) why are more and more sorts of animals and plants disappearing?(4) are

13、 many rivers and lakes dead now?(5) is ozone important to the earth? why?(6) has carbon dioxide in the air increased a lot? ( 讓個(gè)別學(xué)生回答，完成小黑板上的問(wèn)題。)step 3 consolidation第三步鞏固 ( 時(shí)間:8 分鐘 )讓學(xué)生再次讀1a，完成 1b，鞏固本課的語(yǔ)言點(diǎn)，培養(yǎng)學(xué)生的閱讀能力。1. (讓學(xué)生再次讀課文，完成1b。)t: read the passage again. finish 1b alone.( 板書(shū)并讓學(xué)生猜測(cè)mars 和 refer

14、 to的漢語(yǔ)意思。掌握refer to；了解 mars。)mars refer to( 學(xué)生完成后，師生核對(duì)答案。)2. (讓學(xué)生齊讀課文，保證每一個(gè)學(xué)生參與其中。) t: now please read the passage together.3. ( 教師讓學(xué)生討論并找出新的或不懂的語(yǔ)言點(diǎn)，培養(yǎng)學(xué)生的自主學(xué)習(xí)能力。教師解釋學(xué)生仍有疑惑的知識(shí)點(diǎn)并板書(shū)。)4. (讓學(xué)生兩人一組討論，完成下面的表格。)t: how many kindsofpollutionare mentionedinthepassage? how do theyaffectour environment? accordin

15、g to 1a, finish the form on the blackboard.( 板書(shū) )kind of pollutioneffectstep 4 practice第四步練習(xí) ( 時(shí)間 :10 分鐘)使學(xué)生了解各種污染對(duì)地球環(huán)境的影響，培養(yǎng)他們的環(huán)保意識(shí)。1. (讓學(xué)生分組討論，看哪組最快說(shuō)出o3，co2 和溫室效應(yīng)的含義及其對(duì)環(huán)境的影響，并以此寫(xiě)一篇短文，完成2。)t:please read the passage again,discussthe meanings of the followingexpressionsin 2 in groups of 4, and then w

16、rite down how they affect the environment. ( 學(xué)生討論后，與教師核對(duì)答案。)2. (根據(jù)給出的提示詞寫(xiě)一篇小短文，可先口述。)t: write a short passage with the key words given. ( 板書(shū)關(guān)鍵詞。)(1) changein many ways(2) important, destroy, too much, harmful radiation, cause cancer (3)increase a lot, blanket, rise, change(4)serious, do somethingste

17、p 5 project第五步綜合探究活動(dòng) ( 時(shí)間 :5 分鐘 )讓學(xué)生討論各種危害地球的污染方式，并就有關(guān)污染寫(xiě)一篇短文，培養(yǎng)學(xué)生綜合運(yùn)用語(yǔ)言的能力，增強(qiáng)學(xué)生的環(huán)保意識(shí)。1. ( 到目前為止，污染危害地球的方式已基本介紹完畢，可以讓學(xué)生做專(zhuān)題討論，以鍛煉他們組織語(yǔ)言的綜合能力。在此過(guò)程中，鼓勵(lì)學(xué)生大膽發(fā)揮，做最大程度的拓展性討論。最后通過(guò)匯報(bào)，教師檢驗(yàn)活動(dòng)成果。)t: ok, until now, we have learned so many kinds of pollution. now please work in groups and discuss them. after a moment, i ll ask some students to report it.2. homework:write an article about the pollution.板書(shū)設(shè)計(jì)：all these problems are very serious.section cmillions ofwhen it rain