英语选择性必修 第三册Unit 3 Environmental Protection教学ppt课件

这是一份英语选择性必修 第三册Unit 3 Environmental Protection教学ppt课件，共57页。PPT课件主要包含了emissions，melt　，ecology　，released　，carbon，fuel　，worldwide　，trend　，broadcast　，policies　等内容，欢迎下载使用。
Part 1 课前预习设计
Part 2 课堂提升素养
自读课文　疏通文脉大意　Task 1 文本整体理解：理清文章架构1.What des the text mainly tell us?A．Sme plar bears died f starvatin.B．What the greenhuse effect is.C．Glbal warming has caused sme disasters and we must pay attentin t it.D．Hw the plar bears find fd.
2．Match the main idea with each part.Para.1 ______　 A．We need t d smething t reduce greenhuse gas emissins.Para.2 ______ B．The rise in temperature has caused natural disasters.Para.3 ______ C．Earth is getting warmer and warmer.Para.4 ______ D．A dead plar bear was fund, which alarmed sme experts.Para.5 ______ E．Why is Earth getting warmer and warmer？
Task 2 文本细节理解：探寻语篇细节理解Read the text n Pages 26～27 carefully and then chse the best answer.1．Why is the “natural” greenhuse effect imprtant and necessary?A．Because it is shrt-wave radiatin.B．Because it is lng-wave radiatin.C．Because it releases mre heat.D．Because it helps Earth t sustain life.
2．What can we learn frm the text?A．It desn't matter whether we pay attentin t glbal warming r rise in temperature desn't affect peple's life.C．The rise in temperature nly affects sme animals.D．Heat frm the sun keeps Earth habitable.
3．What des the third paragraph mainly tell us?A．What the “greenhuse effect” means.B．Why the glbal temperature rises quickly.C．Hw the heat is released back int space.D．Why the “man-made” greenhuse effect is imprtant t us.
4．What's the authr's purpse f writing this text?A．T call fr peple t dnate mney.B．T ask peple nt t kill plar bears.C．T appeal t peple t care Earth's eclgy.D．T educate peple abut glbal warming.
Task 3 文本理解：续写佳句Read the passage carefully and find ut the sentences t describe the md f shck.(细读短文并找出震惊心理描写的句子)____________________________________________________________________________________________________________________
In 2013, a lt f peple were shcked by a news pht f a dead plar bear that was fund n Nrway's Arctic island f Svalbard.
Task 4 阅读思维升华：主题实践1.Is it human activities that result in the climate change? If s, give yur reasns. (Critical Thinking批判性思维)________________________________________________________________________________________________________________________________________________________________________________________________________________________________________2．As a student, what shuld yu d t deal with climate change? (Creative Thinking创造性思维)____________________________________________________________________________________________________________________
Yes. I think s. With the develpment f sciety, human activities are speeding up day by day. The mre frequently humans behave, the mre the greenhuse gas will be prduced. In this case, Earth is getting warmer and warmer and the damage caused by glbal warming is mre serius.
I will eat less meat and try ging t schl by bike r n ft, reducing the “carbn ftprint”．
精读课文　疏通理解障碍[读文清障]①fr decades几十年②graph [ɡrɑːf] n．图；图表；曲线图③alng with和，以及(主语后有alng with连接的短语时，谓语动词与前面的主语保持一致。)④melt [melt] vi.& vt.(使)融化；熔化；软化⑤prvide evidence提供证据⑥dramatic adj.急剧的；戏剧的a dramatic change急剧变化⑦be shcked by因……而震惊⑧accrding t根据，按照
⑨remain v．剩余，留下，残存⑩starve [stɑːv] vi.& vt.(使)挨饿；饿死starvatin n．饥饿；挨饿；饿死⑪claim v．宣称；要求；索取⑫seal [siːl] n．海豹⑬as befre像以前一样⑭alarming adj.令人担忧的；令人惊恐的alarmed adj.感到担忧的；感到惊恐的⑮have an impact n对……有影响(＝have an effect n)⑯eclgy [i'kɒlədʒi] n．生态；生态学⑰key adj.最重要的，主要的，关键的
⑱refer t指的是；参考，查阅；谈到，提及；有关；提交⑲release [rɪ'liːs] vt.& n．排放；释放；发布⑳methane ['miːθeɪn] n．甲烷；沼气(21)carbn ['kɑːbən] n．碳(22)dixide [daɪ'ɒksaɪd] n．二氧化物carbn dixide二氧化碳(23)trap vt.使陷入困境；绊住；捕捉be trapped in被困在(24)habitable ['hæbɪtəbl] adj.适合居住的(25)sustain [sə'steɪn] vt.维持；遭受；承受住sustainable [sə'steɪnəbl] adj.可持续的；合理利用的
(26)huge amunts f大量，许多(＝a huge amunt f)(27)fssil ['fɒsl] n．化石(28)fuel ['fjuːəl] n．燃料；刺激性言行fssil fuel化石燃料(如煤或石油)(29)cmprehensive [ˌkɒmprɪ'hensɪv] adj.全部的；所有的；详尽的(30)wrldwide ['wɜːldwaɪd] adv.遍及全球地　adj.世界各地的；影响全世界的(31)trend [trend] n．趋势；趋向；动向(32)frequently ['friːkwəntli] adv.频繁地；经常frequent adj.频繁的；经常的(33)bradcast ['brɔːdkɑːst] vt.& vi.(bradcast, bradcast)播送；广播；传播　n．广播节目；电视节目
(34)lss n．损失；遗失；失败(35)cntinued adj.继续的，持久的(36)emissin [i'mɪʃn] n．排放物；散发物；排放(37)result in导致(38)lng-lasting adj.持久的，长期的(39)plicy ['pɒləsi] n．政策；方针；原则(40)as individuals作为个人(41)ftprint ['fʊtprɪnt] n．足迹；(某物所占的)空间量；面积(42)restrict [rɪ'strɪkt] vt.限制；限定；束缚restrictin [rɪ'strɪkʃn] n．限制规定；限制法规；约束　
(43)respnsibility n．责任，职责，义务It's ne's respnsibility t d sth.做某事是某人的责任。(44)seize [siːz] vt.抓住；夺取；控制seize an pprtunity抓住机会(45)issue n．问题；发行物　vt.发行，发布；放出，排出　
[原文呈现]CLIMATE CHANGE REQUIRES THEWORLD'S ATTENTIONWe have knwn abut climate change fr decades①. There is little dubt that Earth is getting warmer and warmer (see the graph②)．[1] A warming cean and atmsphere alng with③ melting④ ice and rising sea levels prvide evidence⑤ f a dramatic⑥ change in the glbal climate.
[1]本句是复合句。“There is little dubt...”意为“毫无疑问……”， that引导同位语从句，解释说明dubt的具体内容。
In 2013, a lt f peple were shcked by⑦ a news pht f a dead plar bear that was fund n Nrway's Arctic island f Svalbard [2]. Accrding t⑧ the scientists wh fund its dead bdy, all that remained⑨ f the plar bear was “skin and bnes”. An expert wh has studied plar bears fr many years said that frm the psitin f its dead bdy, the bear appeared t have starved⑩ and died. Experts claimed⑪ that lw sea-ice levels caused by climate change [3] meant the bear culd nt hunt seals⑫ as befre⑬， s it had t travel greater distances in rder t find fd. This alarming⑭ case shwed hw the increase in temperature had an impact n⑮ Earth's eclgy⑯.[2]此处是that引导的定语从句，修饰先行词plar bear。[3]此处是过去分词短语作后置定语，修饰名词levels。
Then what is causing the increase in the glbal average surface temperature? Climate scientists ften mentin a key⑰ climate prcess called the “greenhuse effect”， which has tw cmmn meanings: the “natural” greenhuse effect and the “man-made” greenhuse effect.[4] The “natural” greenhuse effect refers t⑱ the fact that heat frm the sun enters the atmsphere and warms Earth's surface as shrt-wave radiatin [5]. The heat is released⑲ back int space at lnger wave lengths. Greenhuse gases in the atmsphere, such as methane⑳ and carbn21 dixide22, trap23 sme f the heat, keeping Earth's climate warm and habitable24[6]. Withut this prcess, Earth culd nt sustain25 life. Hwever, the “man-made” greenhuse effect has nw becme a big prblem. When peple prduce huge amunts f26 extra greenhuse gases by burning fssil27 fuels28 [7], mre heat energy is trapped in the atmsphere and causes Earth's surface temperature t rise quickly [8].
[4]本句是复合句。called the “greenhuse effect”是过去分词短语作后置定语，修饰名词prcess; “which ”是定语从句，修饰先行词the “greenhuse effect”。[5]此处是that引导的同位语从句，解释说明fact的具体内容。[6]此处是现在分词短语作结果状语， warm and habitable是形容词作宾语补足语。[7]此处是动词-ing短语作介词by的宾语。[8]此处是动词不定式短语作宾语补足语。
There is strng and cmprehensive29 evidence that the rise in temperature has led t an increase in extreme weather and natural disasters wrldwide30, nt nly causing serius damage, but als csting human lives.[9] Climate scientists have warned that if we d nt take apprpriate actins, this warming trend31 will prbably cntinue and there will be a higher price t pay [10]. In fact, news reprts are frequently32 bradcast33 abut extreme rainstrms and heatwaves causing deaths and ecnmic lsses34[11].[9]本句是复合句。“There ”是主句；“that the ”是同位语从句，解释说明evidence的具体内容。“nt nly causing...”和“but als csting...”是两个并列的现在分词短语作结果状语。[10]此处是动词不定式作定语，修饰名词price。[11]此处是现在分词短语作后置定语，修饰名词短语rainstrms and heatwaves。
Cntinued35 greenhuse gas emissins36 will result in37 further warming and lng-lasting38 changes t the glbal climate. This requires the attentin f peple all ver the wrld. Gvernments need t cnsider making plicies39 and taking apprpriate actins and measures t reduce greenhuse gas emissins.[12] We as individuals40 can als reduce ur “carbn ftprint41” by restricting42 the amunt f carbn dixide ur lifestyles prduce [13]. It is ur respnsibility43 t seize44 every pprtunity t educate everyne abut glbal warming, alng with its causes and impacts, because this is the mst serius issue45 affecting all f us n this planet. S what will yu d t help [14]?
[12]本句是简单句。“t measures”是动词不定式短语作动词need的宾语； making plicies和“”是两个并列的动名词短语作动词cnsider的宾语；“t ”是动词不定式短语作目的状语。[13]此处是定语从句，省略了关系代词that/which，修饰先行词carbn dixide。[14]此处是动词不定式作目的状语。　 
[课文翻译]气候变化需要全世界的关注我们几十年前就知道气候变化了。毫无疑问，地球正在变得越来越温暖(见图表)。海洋和大气的变暖以及冰川的融化和海平面的上升，为全球气候的急剧变化提供了证据。2013年，一张新闻照片让很多人感到震惊。照片中是北极圈内挪威斯瓦尔巴群岛上发现的一具北极熊尸体。据发现北极熊尸体的科学家说，这只北极熊只剩下了“皮和骨头”。一名研究北极熊多年的专家说，从尸体的位置来看，这只熊似乎是饿死的。专家称，气候变化造成海冰水位较低，意味着这只熊无法像以前那样捕猎海豹。所以为了寻找食物，它不得不长途跋涉。这一令人震惊的案例表明，气温升高对地球生态产生了影响。
那么是什么导致了全球平均表面温度上升呢？气候科学家经常提到一个被称为“温室效应”的重要气候过程，它有两个普遍的含义：“自然”温室效应和“人为”温室效应。“自然”温室效应指的是来自太阳的热量进入大气层，并以短波辐射的形式使地球表面变暖。热量以更长的波长释放回太空。大气中的温室气体，如甲烷和二氧化碳，会捕获一些热量，使地球气候保持温暖且适宜居住。如果没有这个过程，地球就无法维持生命。然而，“人为”温室效应现在已经成为一个大问题。当人类由于燃烧化石燃料产生大量额外的温室气体时，更多的热能被困在大气中，导致地表温度迅速上升。
有充分而全面的证据表明，气温上升已导致世界范围内极端天气和自然灾害的增加，不仅造成了严重的破坏，而且还造成了人员伤亡。气候科学家警告说，如果我们不采取适当的行动，这种变暖的趋势可能会继续下去，并将(使我们)付出更高的代价。事实上，新闻经常报道造成死亡和经济损失的极端暴雨和热浪。持续的温室气体排放将导致全球气候进一步变暖和长期变化。这需要全世界人民的关注。各国政府需要考虑制定政策并采取适当的行动和措施来减少温室气体排放。作为个人，我们也可以通过限制生活方式所产生的二氧化碳排放量来减少我们的“碳足迹”。我们有责任抓住每一个机会，对每个人进行全球变暖及其原因和影响的教育，因为这是影响我们这个星球上所有人的最严重的问题。那么你会做什么来助力呢？
自查语基　落实基本知能　Ⅰ.核心词汇根据语境写出正确的单词1．restrict the gas ________ 　限制气体排放2．begin t ________ 　开始融化3．have an impact n Earth's ________ 　对地球生态有影响4．be ________ back int space 　被释放回太空5．________ dixide 　二氧化碳6．run ut f ________ 　用完燃料7．attract ________ attentin 　引起全世界的关注8．a lng-term ________ 　长期趋势
9．a live ________ 　一场现场直播10．make ________ 　制定政策11．carbn ________ 　碳足迹12．________ the pprtunity 　抓住机会13．________ greater change 　经历了更大的变化14．________ rainfall 　适度的降雨量15．make an ________ reprt 　做一份年度报告16．a ________ pwer plant 　一个核电站17．be ________ t the sudden change f weather 　对天气的突然变化敏感18．the king f the ________ 　丛林之王
Ⅱ.拓展词汇根据语境写出相应的派生词1．________ [stɑːv] vi.& vt.(使)挨饿；饿死→starvatin n．挨饿；饿死→starving adj.挨饿的2．________ ['hæbɪtəbl] adj.适合居住的→habitat n．动物栖息地；植物生长地3．________ [sə'steɪn] vt.维持；遭受；承受住→sustainable adj.可持续的；合理利用的→sustainability n．持续性；可维持性4．________ ['friːkwəntli] adv.频繁地；经常→frequent adj.频繁的；经常的→frequency n．频率；频繁5．________ [rɪ'strɪkt] vt.限制；限定；束缚→restrictin n．限制规定；限制法规；约束→restricted adj.受限制的
frequently　
构词规律-tin常用于动词之后构成名词，表示“行为”，引申为“行为的过程、结果、情况、状态、动作”等。restrict v．→restrictin n．限制规定；限制法规；约束regulate v．→________ n．章程； 规章制度inspect v．→________ n．检查；查看；视察 restre v．→________ n．恢复；复原；修复
Ⅲ.重点短语1．________________ 参考；涉及；指的是；适用于2．________________ 根据3．________________ 对……产生影响4．________________ 导致；通向5．________________ 处理；涉及；做生意6．________________ 代表(代替)某人7．________________ 导致8．________________ 被困在……
have an impact n
be trapped in
Ⅳ.重点句型1．[句型]“There is n/little dubt that...”意为“毫无疑问……”[教材]___________________ Earth is getting warmer and warmer (see the graph)．毫无疑问，地球正在变得越来越温暖(见图表)。2．[句型]withut引导含蓄虚拟条件句[教材]________________， Earth culd nt sustain life.没有这个过程，地球就无法维持生命。
There is little dubt that
Withut this prcess
3．[句型](1)“There is evidence that...”意为“有证据表明……”(2)现在分词(短语)作结果状语[教材]____________________________________ the rise in temperature has led t an increase in extreme weather and natural disasters wrldwide, _________________________， but als csting human lives.有充分而全面的证据表明，气温上升已导致世界范围内极端天气和自然灾害的增加，不仅造成了严重的破坏，而且还造成了人员伤亡。
There is strng and cmprehensive evidence that
nt nly causing serius damage
Ⅴ.理清复杂句式1．[教材]Accrding t the scientists wh fund its dead bdy, all that remained f the plar bear was “skin and bnes”．[分析][翻译]据发现北极熊尸体的科学家说，这只北极熊只剩下了“皮和骨头”。
2．[教材]An expert wh has studied plar bears fr many years said that frm the psitin f its dead bdy, the bear appeared t have starved and died.[分析][翻译]一名研究北极熊多年的专家说，从尸体的位置来看，这只熊似乎是饿死的。
3．[教材]It is ur respnsibility t seize every pprtunity t educate everyne abut glbal warming, alng with its causes and impacts, because this is the mst serius issue affecting all f us n this planet.[分析]
[翻译]我们有责任抓住每一个机会，对每个人进行全球变暖及其原因和影响的教育，因为这是影响我们这个星球上所有人的最严重的问题。
探究新知　发展语言知识　1(教材P26)There is little dubt that Earth is getting warmer and warmer (see the graph)．毫无疑问，地球正在变得越来越温暖(见图表)。
◎句型公式：“There is n/little dubt that...”意为“毫无疑问……”(1)There is n dubt that... 毫无疑问……，that在句中引导同位语从句。There is sme dubt whether... 有……疑问Sb. has/have n dubt that... 毫无疑问……(2)I dn't/never dubt that... 我确信……I dubt whether/if... 我怀疑……[佳句]　[2022·新高考Ⅰ卷]There is n dubt that yur prfessinal and prfund knwledge f English will benefit the students greatly.毫无疑问，你的专业和深厚的英语知识将使学生受益匪浅。
[练通]——单句语法填空①There is sme dubt ________ I can inspire him t study hard t achieve his gal.②[2021·浙江高考读后续写]I dubted ________ my parents wuld agree that I had the right t manage my earnings.[写美]——一句多译[2020·全国Ⅱ卷书面表达]毫无疑问，用自己的双手劳动而不是依靠别人是非常有意义的。③_________________ it is very meaningful t wrk with ur wn hands rather than depend n thers. (dubt n．)④_______________ it is very meaningful t wrk with ur wn hands rather than depend n thers. (dubt vt.)
There is n dubt that
We dn't dubt that
2(教材P26)An expert wh has studied plar bears fr many years said that frm the psitin f its dead bdy, the bear appeared t have starved and died.一位研究北极熊多年的专家说，从北极熊尸体的位置看，北极熊似乎是饿死的。◎starve vi.& vt.(使)挨饿；饿死(1)starve fr 渴望，极想得到starve t death 饿死(2)starvatin n. 挨饿(3)starving adj. 饥饿的，挨饿的be starving fr sth./t d sth. 渴望某事/做某事[佳句]　[2020·浙江高考读后续写]Fear held us entirely in its pwer, and it made us starving t flee fr safety.我们惊恐万分，急于逃到一个安全的地方。
[练通]——单句语法填空①I am starving ________ (study) English well, because mastering English means we can see the wrld thrugh a new windw.②What shcked the scientists was that many seals died frm ________ (starve) because they culdn't find enugh fd t eat.[写美]——读后续写之动作描写③这个孩子身无分文又饥肠辘辘，站在路边要饭，否则就会饿死。Penniless and starving, the child std near the rad and begged fr a meal, therwise he _________________．
wuld starve t death
3(教材P26)The “natural” greenhuse effect refers t the fact that heat frm the sun enters the atmsphere and warms Earth's surface as shrt-wave radiatin.“自然”温室效应是指太阳的热量进入大气层，并以短波辐射的形式使地球表面变暖。◎refer t指的是；涉及，提及；提交；参考，查阅(1)refer 把……称作…… 把……提交给……(2)reference n. 提及；参考；查阅reference bk 参考书；工具书[佳句]　When he delivered his speech n hw t release the great pressure, he didn't refer t his ntes.当他发表关于如何释放巨大压力的演讲时，他没有参考他的笔记。
[练通]——写出下列句中加黑部分的含义①When I spke f that girl, I wasn't referring t her daughter.____________②We have reached an agreement that we will nt refer t the matter again.____________③Peple wh wrk in ffices are usually referred t as “white cllar wrkers”．____________④As the situatin was unusual, he referred the matter t the editr.____________[温馨提示]　refer的过去式、过去分词、现在分词分别为： referred、 referred、 referring。
4(教材P27)The heat is released back int space at lnger wave lengths.热量以更长的波长释放回太空。◎release vt.& n．排放；释放；发布(1) 把……从……释放(2)n/in release 发行，在公映the latest release 最新发行的产品[佳句]　The ld factry keeps releasing smke, making the air dirty.这家老旧的工厂不停地排放烟雾，使空气变得污浊。
[练通]——单句语法填空①At the end f the ceremny, a vide abut ur alumni's fighting against the disease ____________ (release) fr us t watch, which mved us deeply.②It is reprted that an interesting film is ________ release in that cinema.
was released
5(教材P27)Withut this prcess, Earth culd nt sustain life.没有这个过程，地球就无法维持生命。◎句型公式：withut引导含蓄虚拟条件句(1)本句中的withut this prcess是介词短语，相当于条件状语从句，引起虚拟语气。(2)类似用法的还有therwise、 r、 but fr等。[佳句]　I'd like t take this pprtunity t express my gratitude t yu fr yur generus help, withut which I wuldn't have made such rapid prgress. 我想借此机会表达你对我慷慨帮助的感激之情，没有你的帮助，我不会取得如此快的进步。
[练通]——单句语法填空①With the mderate measures, we ___________ (build) a harmnius sciety in the future.②What a pity! Yu missed the sightseeing, r we _________________ (have) a gd time tgether.[写美]——应用文之感谢信③没有英语老师的鼓励和帮助，我早就放弃学英语了。Withut my English teacher's encuragement and assistance, ______________________________．
wuld have had
I wuld have given up studying English
6(教材P27)There is strng and cmprehensive evidence that the rise in temperature has led t an increase in extreme weather and natural disasters wrldwide, nt nly causing serius damage, but als csting human lives.有充分而全面的证据表明，气温上升已导致世界范围内极端天气和自然灾害的增加，不仅造成了严重的破坏，而且还造成了人员伤亡。◎句型公式：“There is evidence that...”意为“有证据表明……”现在分词(短语)作结果状语(1)“There is evidence that...”意为“有证据表明……”， that引导同位语从句，解释evidence的具体内容。(2)现在分词(短语)作结果状语，表示自然而然的结果，其逻辑主语往往是前面的句子。(3)不定式(短语)也可作结果状语，往往表示出乎意料的结果，其前通常加nly。
[佳句]　There is cnvincing evidence that stress is partly respnsible fr his failing health.有令人信服的证据表明压力是他健康状况下降的部分原因。Many peple in rural areas g t big cities t wrk, leaving the elderly and children at hme.许多农村人到大城市打工，把老人和孩子留在家里。
[练通]——单句语法填空①There is clear evidence ________ smking causes heart disease.②They reached the cmpany ut f breath, nly ________ (tell) they were fired.[写美]——应用文之节日③正如你所知道的，全世界的华人欢度春节，使之成为最受欢迎的节日之一。As yu knw, the Spring Festival is celebrated by Chinese all ver the wrld, _______________________________．
making it ne f the mst ppular festivals
7(教材P27)We as individuals can als reduce ur “carbn ftprint” by restricting the amunt f carbn dixide ur lifestyles prduce.我们个人也可以通过限制生活方式产生的二氧化碳量来减少“碳足迹”。◎restrict vt.限制；限定；束缚(1)be restricted t 限制(在某范围)restrict ne's freedm 限制某人的自由(2)restrictin n. 限制规定；限制法规；约束withut restrictin 没有限制(3)restrictive adj. 限制(性)的；约束(性)的[佳句]　My mther ften restricts my freedm, which makes me burn with anger.我妈妈经常限制我的自由，这使我非常生气。
[练通]——单句语法填空①The number f club members __________ (restrict) t ten, s it is difficult t be admitted t the club.②The newly-pened swimming club is pen t families in the neighburhd withut ________ (restrict)．
is restricted
8(教材P27)It is ur respnsibility t seize every pprtunity t educate everyne abut glbal warming, alng with its causes and impacts, because this is the mst serius issue affecting all f us n this planet.抓住每一个机会，对所有人进行全球变暖及其成因和影响的教育，这是我们的责任，因为这是影响我们地球上所有人最严重的问题。◎seize vt.抓住；夺取；控制seize sb. by the＋身体部位 抓住某人的……seize a chance/an pprtunity 抓住机会seize n/upn 抓住；突然对……大为关注[佳句]　The mment I saw my father's cludy face, panic seized me.我一看到父亲阴云密布的脸，就感到恐惧。(读后续写之恐惧心理描写)