Unit 1 Nature in the balance Welcome to the unit & Reading ppt课件- -（2020版）新牛津译林版高中英语必修第三册.pptx

1、【版本：译林册别：必修三】目录页contentsPre-readingPost-readingFast readingIntensive readingPre-readingPre-reading上文两句出自德国哲学家、革命导师弗里德里希恩格斯的劳动在从猿到人转变过程中的作用一文，意在说明人类与自然界要和谐共处。Let us not,however,flatter ourselves overmuch on account of our human victories over nature.For each such victory nature takes its revenge on u

2、s.但是我们不要过分陶醉于我们人类对自然界的胜利。对于每一次这样的胜利,自然界都对我们进行报复。Song 1:Heal the World (by Michael Jackson)Pre-reading:Welcome to the unit(P1)Song 2:The earth is our only home.(from P1)Questions:What is the message of the two songs?What can you do to help protect the environment?Listen to the songsPre-reading:Import

3、ant phrases in Welcomethe human race_ do harm(to)_cut down _sound the alarm _be thankful for sth _find the solution(to sth)_对对有害有害人类人类砍伐，砍倒砍伐，砍倒发出警报发出警报对对感激；为感激；为庆幸庆幸找到解决找到解决的的方法方法Fast readingThe world we live in is full of natural wonders.Today we come to know the Amazon rainforest,which is home to

4、 a wide range of wildlife.Fast reading:P2-3 When it comes to the Amazon rainforest,where is it?what plants or animals do you know about?do you know the great fire in 2019 there?Free talk The World Wildlife Foundation(WWF)says the worlds largest rainforest contains millions of species of plants and a

5、nimals.Many of them are still unknown.Among the best known animals are jaguars,eagles,pink river dolphins,parrots,large snakes and many butterflies.More than 30 million people,including 350 indigenous and ethnic groups,live in the Amazon area and depend on the forests for food and shelter.Whats in t

6、he Amazon?The fires not only destroy parts of the carbon-absorbing forests,but they release millions of metric tons of carbon into the air.The Amazon rainforest also is important to rainfall in the area.Deforestation makes rains less frequent,extending the dry season.If 20 to 25 percent of the fores

7、t were destroyed,the dry season would expand.That would mean the area would no longer be a rainforest,but a tropical savannah,or an area with grasslands and few trees.Unfortunately,we are already seeing signs of the Amazon turning into a savannah.What do the fires mean to the worlds climate?The curr

8、ent fires in the Amazon are not wildfires.They are mostly set illegally by people who are clearing the forest to raise cattle and crops.People clear the land by cutting down the trees during the rainy season,letting the trees dry out and burning them during the dry season.Fully clearing the thick fo

9、rest for agricultural use can take several years of cutting and burning.What is causing the fires?Read the documentary script and write the main idea of each paragraph.Para.1:Introduction to the Amazon rainforestPara.2:Basic information about the rainforestPara.3:_Para.4:_Para.5:_Fast reading Its ab

10、undant plant species A wide range of animal species and an unusualexample-jaguar Appeal to people to preserve the rainforestIntensive reading1.How to understand the sentence“a huge sea of green alive with the sounds of animals”?a sea of:_alive with:_这是一片绿色的海洋，到处都可以听到动物发出的声音。Intensive reading:Read ca

11、refully and answer questions 大量的，大片的充满，到处都是（活的或动的东西）2.What is the function of the Amazon rainforest?It plays a significant role in maintaining the fine balance of the Earths ecosystem.Intensive reading:Read carefully and answer questions Intensive reading:ecosystemplantsanimalswaterpeopleclimatesoil

12、airAll these factors contribute to the richest on the Earth.Intensive reading:Read carefully and answer questions 86 million64004000130040020%17%Intensive reading:Read carefully and answer questions Basic information about the rainforest_:8 countries and one overseas region _:around 6 million square

13、 kilometres of forest_:about 6,400 km in lengthlengthsizelocationIntensive reading:Read carefully and answer questions location:The Amazon rainforest crosses into eight countries,including Brazil and Peru,and one overseas region of France,all on the South American continent.横越巴西横越巴西(占森林占森林60%60%面积面积

14、)、哥伦比亚、哥伦比亚、秘鲁、委内瑞拉、厄瓜多尔、玻利维秘鲁、委内瑞拉、厄瓜多尔、玻利维亚、圭亚那、苏里南、法国（法属圭亚、圭亚那、苏里南、法国（法属圭亚那），占世界雨林面积的一半，全亚那），占世界雨林面积的一半，全球森林面积的球森林面积的20%20%，是全球最大及物种，是全球最大及物种最多的热带雨林。亚马孙雨林被人们最多的热带雨林。亚马孙雨林被人们称为称为“地球之肺地球之肺”和和“绿色心脏绿色心脏”。Intensive reading:Read carefully and answer questions size:With an area of around 6 million squar

15、e kilometres,the Amazon rainforest is more than half the size of China.=China is more than twice _ _ _ the Amazon rainforest.asbig/largeasIntensive reading:Read carefully and answer questions length:The Amazon River,from which the rainforest gets its name,is close to 6,400 kilometres in length rough

16、y 100 kilometres longer than the Yangtze River.On its journey from the mountains to the ocean,the river supports many different ecosystems.Intensive reading:P5Intensive reading:Read carefully and answer questions They give the Amazon rainforest the richest b_ on the Earth:one in ten known s_ in the

17、world can be found here.iodiversitypeciesThey:_ _ the specific location,the impressive size and length Intensive reading:Read carefully and answer questions Of the 390,000 plants species known to us,more than 40,000 can be found in the Amazon The forests different levels of plant species support an

18、u_ variety of wildlife.nbelievableIntensive reading:Read carefully and answer questions The forests different levels of plant speciesAt the bottom,_.Above that _.The next level_.Each level of the forest forms its own little world,_ to different kinds of living things.homeThen there are _,and finally

19、_.there is a system of roots beneath the groundis the mass of leaf litter on the dark forest flooris made up of shorter plants with large leavesthe towering ancient hardwoodsthe tops of the tallest trees many metres above the groundIntensive reading:Read carefully and answer questions The forests di

20、fferent species of animals More than 1,300 species of b_ and over 400 species of m_ hide among the jungles plant life.They form a perfect _ in the forest.irdsammalsfood chain Intensive reading:Read carefully and answer questions Jaguars feed on at least 87 species,including _.These frogs,in turn,fee

21、d on _ which eat _ and _.When a jaguar dies,a tiny army of microorganisms helps _ its body and _ the nutrients to the earth.frogsinsectsleavesfruitbreak downreturnIntensive reading:Read carefully and answer questions frogsinsectsleaves and fruitJaguars dead bodiesJaguarsthe forests food chainIntensi

22、ve reading:Read carefully and answer questions 1.What makes the Amazon rainforest a natural treasure according to the script?The Amazon forest breathes life into the planet by fixing carbon and producing over 20 percent of all the Earths oxygen.Thus,it is known as the“lungs of the planet”.Moreover,t

23、he Amazon forest is a treasure house of species that can be used for food or medicine.Intensive reading:Read carefully and answer questions 2.The forests current danger:There is one major danger to these _ plants and animals.Over the past 50 years,about 17%of the rainforest has disappeared _ _ human

24、 activities,such as a_ and cattle f_.irreplaceableduetogriculturearming3.What question are we left with?Can we afford to damage the“lungs of the planet”?Intensive reading:Read carefully and answer questions 4.In addition to humans activities,what other factors may contribute to the disappearance of

25、the forest?The answer may be here:The following passage is from a website about the Amazon rainforest.Please complete the passage with the correct forms of the words and phrases in the box below.(P5)Post-reading1对有害2砍伐树木3发出警报4找到某事的解决方法5因为(account)6自然奇迹7种类繁多的野生生物do harm/damage to sthcut down treessou

26、nd the alarmfind the solution to sthon account ofnatural wondersa wide range of wildlifeImportant words&phrases8充满，到处都是某物9在某事中起重要作用10保持生态系统完美平衡11的面积12超过中国面积的一半13得名于be alive with sthplay a significant role in maintain the fine balance of the ecosysteman area ofmore than half the size of Chinaget ones

27、 name from Important words&phrases14在长度上15地球上最丰富的多样性16躺在上面17令人难以置信的野生生物多样性18在底部19在地下in lengththe richest biodiversity on the Earthlie down on sthan unbelievable variety of wildlifeat the bottomImportant words&phrasesbeneath the ground20由组成21高耸的古老硬木22食物链上的一要素23以为食24相应地，依次25一小群微生物be made up ofthe towe

28、ring ancient hardwoodsone element of the food chainfeed on sthin turna tiny army of micro-organismsImportant words&phrases26分解27给带来起色，注入活力28固定；修理29而且；此外30不可替代的31继续做某事break downbreathe life into sthfixmoreoverirreplaceablecontinue doing/to do sthin danger of extinctionImportant words&phrases33给某人留一个问

29、题34承担得起做某事35积累营养36因此37吸收;欺骗38被锁上，被关起来leave sb with a questioncan afford to do sthbuild up nutrientsas a resulttake inbe locked upImportant words&phrasesgrow at an unbelievable speed40documentary script41的家园，的栖息地42各种各样的43根据判断（做状语的形式）44大片的、成片的 纪录片脚本be home toa wide range of judging froma sea of Import

30、ant words&phrasesdue to1.The Amazon rainforest crosses into eight countries,including Brazil and Peru,and one overseas region of France.语法功能：_ 此句可改为：The Amazon rainforest crosses into eight countries,Brazil and Peru,and one overseas region of France_(include).Important sentences2.The Amazon River,fr

31、om which the rainforest gets its name,is close to 6,400 kilometres in length语法功能：_ Important sentences3.Above that is the mass of leaf litter on the dark forest floor.语法功能：_ 4.While a significant number of jaguars survive here,they are only one element of this forests food chain.语法功能：_Important sent

32、ences5.Over the past 50 years,about 17 per cent of the rainforest has disappeared due to human activities such as agriculture and cattle farming.语法功能：_语法功能：_6.With an area of around 6 million square kilometres,the Amazon rainforest is more than half the size of China.The Amazon River,.roughly 100 ki

33、lometres longer than the Yangtze A+be+倍数倍数+the size/height/weight/length/width/depth of+BA+be+倍数倍数+比较级比较级+than B Important sentencesA+be+倍数倍数+as+形容词形容词/副词副词+as倍数倍数+what+主语主语+谓语谓语 The world we live in is full of amazing w_.Among them,the Amazon rainforest is a natural treasure,A huge sea of green _ w

34、ith the sounds of animals.As the largest rainforest in the world,it plays a s_ role in m_ the fine balance of theEarths e_.Fill in the blanks according to the scriptondersaliveignificantaintainingycosystem The Amazon rainforest c_ into eight countries and one o_ region,all on the South America c_.Wi

35、th an _ of around 6 million square kilometres,theAmazon rainforest is more than half the _ of China.The Amazon River,_which the rainforest gets its name,is close to 6,400 kilometres in l_r_ 100 kilometres l_ than the Yangtze River._ its journey from the mountains to the ocean,the river supports many

36、 different e_.They give this area the r_ biodiversity on the Earth.rossesverseasontinentareasizeengthouglyongerOncosystemsichestfromFill in the blanks according to the script More than 40,000 plant s_ can be found in the Amazon.The forests different levels support an u_ variety of wildlife.At the b_

37、,there is a system of roots b_ the ground.Above that _ the mass of leaf litter on the dark floor.The next level is _shorter plants with large leaves.Then there are the t_ ancient hardwoods,and finally the tops of the tallest trees many metres above the ground.Each level of the forest forms its own l

38、ittle world,_ to different kinds of living things.peciesnbelievableottomeneathismade up ofoweringhomeFill in the blanks according to the script More than 1,300 birds and over 400 mammals h_ in the jungle.The jaguar is one example.While a significantnumber of jaguars s_ here,they are only one e_ of t

39、he forests food _.They f_ on frogs.These frogs,in _,live on insects which eat leaves and fruit.When a jaguar dies,a tiny a_ of microorganisms helps _ its body and return the n_ to the earth.ideurvivelementchaineedturnrmybreak downutrientsFill in the blanks according to the scriptThe Amazon rainfores

40、t b_ life into the planet by f_carbon and p_ over 20%of all the Earths oxygen.Thus,it is k_ as the“lungs of the planet”.M_,the Amazon rainforest is a treasure house of species,used for food or m_.Yet,there are some hidden unavoidable dangers to these i_ plants and animals.One danger is that the soil

41、 in the Amazon is poor in n_.Actually,the poor soil can not support a_ for morethan a few years.Why is the soil so poor?reathesixingroducingnownoreoveredicinerreplaceableutrientsgricutureFill in the blanks according to the script_,the rainy seasons water _ away the nutrients in the soil.For another

42、thing,on _ of the hot climate,it is hard for the soil to b_ _ enough nutrients.The nutrients of dead plants and animals are soon t_ in by the roots of plants b_ the ground,and then are l_ up in the plants themselves,thus _(allow)them to grow at an u_ speed.Finally,the soil will become poorer with ti

43、me going by.takesuildupakeneneathockedallowingnbelievabeaccountFor one thingFill in the blanks according to the scriptAnother danger is that about 17%of the rainforest has disappeared _ _ _ of human activities such as agriculture and cattle f_.As the impact of human activities c_ to grow and the list of species in danger of e_ becomes longer,we are l_ with a question:can we a_ to damage the“lungs of the planet”?resultarmingontinuextinctioneftffordFill in the blanks according to the scriptasa Homework Introduce the The Amazon rainforest