核心英语读写第二册U.ppt

1、Unit 2 Energy,Learning objectives,learn about renewable energy sources; words, expressions, and sentence patterns related to the theme of this unit; research renewable energy sources on the Internet; give an oral presentation about renewable energy sources; learn to use definitions and classificatio

2、ns in your writing.,Part I Approaching the Topic,Part II Understanding the Text,Part IV Integrated Exercises,Part I Approaching the Topic,Task 1 Brainstorming,Task 2 Surfing and Reporting,Task 3 Watching and Retelling,Task 4 Vocabulary Preview,1. Discuss the pictures above with your partner and make

3、 a list of no less than 10 words to discuss renewable energy sources. 2. Make a list of different types of renewable energy sources.,Task 1 Brainstorming,Unit 2 Part I Task 1,Unit 2 Part I Task 1,Which renewable energy sources have been used since ancient times? Introduce one of these energy sources

4、, giving an example of its early application.,1. Work in groups and find information on the Internet about the following terms.,Task 2 Surfing and Reporting,Unit 2 Part I Task 2,Unit 2 Part I Task 2,Web resources /wiki/Renewable_energy house-music-energy-crisis1.htm http:/en.wi

5、/wiki/Greenhouse_gas /wiki/Clean_Air_Act /wiki/LED,Answers for reference:,Unit 2 Part I Task 2,Fill in the spaces below according to your Internet research. Present this information to the class, optionally using PowerPoint.,Unit 2 Part I Task 2

6、,solar cells,Japan Pavilion at the Expo 2010 in Shanghai,It features the worlds first pillow membrane with builtin amorphous solar cells.,The solar power system has a generation output of 2030 kw a day.,Solar Energy,Renewable Energy,Practical Application,Place,Detail,Advantages,Unit 2 Part I Task 2,

7、wind farms,Buffalo Ridge in northwest Iowa, America,This wind farm utilizes 2 Gamesa G-87wind turbines providing 4.0 Megawatts of electric capacity. One turbine is in operation and the other is in final stages of commissioning.,It is expected to produce an average of approximately 10,000,000 kilowat

8、t-hours annually, or Enough power to supply about 1000 homes.,Wind Energy,Renewable Energy,Practical Application,Place,Detail,Advantages,Unit 2 Part I Task 2,geothermal energy plant,a small town outside of Munich, Germany,It uses a combination of water and ammonia to maximize the amount of power gen

9、erated by the massive turbines.,The plant is capable of generating 3.4 megawatts of electricityor enough to power 10,000 homes.,Unit 2 Part I Task 2,hydroelectric dam,The Paran River on the border between Brazil and Paraguay,Itaipu Hydroelectric Dam is the largest operational hydroelectric energy pr

10、oducer in the world, with an installed generation capacity of 14GW.,Energy generated by Itaipu helps meet demands from the two countries. About 90% of the energy generated by the plant is used by Brazil.,Unit 2 Part I Task 2,biomass- fuelled boilers,Unilevers Hefei factory in China s Anhui Province,

11、The factory is using agricultural waste, such as straw, corn stalks and even peanut shells as a fuel in the manufacture of laundry powder.,The biomass-fuelled boilers are cutting carbon emissions by 15, 000 tonnes annually 32% of total site emissions while reducing fuel costs by 50%.,Task 3 Watching

12、 and Retelling,Watch the video clip “The BBC World Debate about Renewable Energy”. Use the glossary below as a reference.,Unit 2 Part I Task 3,Unit 1 Part I Task 3,The debate is about how best to reduce carbon emissions.,What is the topic of the debate?,Answer the questions in the following table ac

13、cording to what you heard in the video clip.,Unit 1 Part I Task 3,The question is: Is it (renewable energy) our best weapon against the global climate change?,What question does the hostess raise at the beginning of the debate?,Unit 1 Part I Task 3,Now the renewable energy delivers about 18% of the

14、worlds electricity.,What percentage of the worlds electricity is generated by renewable energy now?,Unit 1 Part I Task 3,It is used to fight against economic slowdown and new jobs will be created and provided through the development of new renewable energy.,What is the new meaning of renewable energ

15、y, according to Gu Jun?,3. Watch the video again and then discuss the main idea with the group., ,【Script】,Unit 2 Part I Task 3,Script,Unit 2 Part I Task 3,Task 4 Vocabulary Preview,Read the words and phrases below, paying attention to the pronunciation. Put a check mark () next to the words that yo

16、u know. Try to understand unfamiliar words from context.,Glossary for Main Reading,Unit 1 Part I Task 4,Nouns,Verbs,Adjectives,Phrases,Adverbs,Unit 1 Part I Task 4,Nouns,Glossary for Related Reading,Verbs,Adjectives,Adverbs,Phrases,Part II Understanding the Text,Main Reading,Related Reading,Main Rea

17、ding,Text-Related Information,Text Structure Analysis,Language Points,Translation of the Texts,Tasks,Text-Related Information,1. renewable energy,Unit 2 Part II Main Reading,Unit 2 Part II Main Reading,2. harnessing energy from human movements,Unit 2 Part II Main Reading,3. Kyoto Protocol / Kyoto Tr

18、eaty,Text Structure Analysis,Unit 2 Part II Main Reading,Unit 2 Part II Main Reading,Unit 2 Part II Main Reading,Unit 2 Part II Main Reading,Language Points,Unit 2 Part II Main Reading,1. It appears as though the crusade to determine the best alternative energy sources is seriously being looked into

19、 by lots of countries including most American cities. (L1),【译文】,看起来好像许多国家，也包括大多数美国城市，正在认真研究一项确定最佳替代能源的运动。,Unit 2 Part II Main Reading,He seems to be running a one-man crusade against smoking. They have long been involved in a crusade for racial equality.,e.g.,crusade n. a long and determined effort

20、to achieve something that you believe to be right or to stop something that you believe to be wrong,Unit 2 Part II Main Reading,look into: investigate, study,e.g.,The government will look into how to reduce unemployment. Police are looking into the disappearance of two children.,Unit 2 Part II Main

21、Reading,These renewable energy sources have demonstrated to be of great aid in cutting down the amount of toxins, which are by-products of the consumption of energy. (L7),这些可再生能源已证明非常有助于减少有毒物质能源消耗所产生的副产品。,【译文】,Unit 2 Part II Main Reading,cut down: reduce the amount of something,e.g.,If you find it d

22、ifficult to stop drinking altogether, try to cut down as much as possible. My doctor told me to cut down on coffee and cigarettes.,Unit 2 Part II Main Reading,e.g.,The laws have led to a reduction in fuel consumption in the U.S. There was an increase in the consumption of meat last year.,consumption

23、 n. the act of consuming or using something,Unit 2 Part II Main Reading,3. convert (L14) vt. to change the nature, purpose, or function of something convert sth to/into sth convert coal to/into pipeline gas,e.g.,By means of photosynthesis, plants convert the radiant energy of the sun into chemical e

24、nergy.,Unit 2 Part II Main Reading,4. Since the 1950s solar cell technology has been advancing and has come quite a long way. (L20),自20世纪50年代以来，太阳能技术不断发展，并且取得了相当大的进步。,【译文】,come a long way: develop, progress or become very successful,He has come a long way since the days he could only afford one meal

25、 a day. Weve come a long way since those early days of the project.,Unit 2 Part II Main Reading,5. Photovoltaic cells mounted on rooftops are used to heat water using the suns rays. (L22),通过利用太阳光，安放在屋顶上的光伏电池被用来加热水。,e.g.,The statue was mounted on/onto a marble plinth. Her husband mounted the work on

26、velour paper and made the frame.,【译文】,mount vt. to fix onto a backing, setting, or support,Unit 2 Part II Main Reading,6.To date, the main disadvantage of using this source is that it is limited. (L27),迄今为止，利用这种能源最主要的缺点就是它会受到限制。,to date: up to now,e.g.,To date we have received more than five hundred

27、 applications. However, financial contributions and commitments have been limited to date.,【译文】,Unit 2 Part II Main Reading,7. Another ancient source of power, wind energy has been harnessed by sailors, farmers and architects for many years, even documented as far back as 5,000 years ago. (L32),风能是另

28、一种古老的能源，已被水手、农民和建筑师们利用多年，记载甚至可追溯至五千年前。,【译文】,document vt. to record in detail,He wrote a book documenting his prison experiences. The history of this area is very well documented.,Unit 2 Part II Main Reading,8. essential (to, for / to do/ that) (L41) a. extremely important and necessary in order to d

29、o something correctly or successfully,e.g.,Mutual understanding is essential to friendship. It is essential that you understand what terms you are agreeing to before you finalize a contract.,Unit 2 Part II Main Reading,a. connected with the most important aspect or basic nature of somebody/ somethin

30、g =fundamental only before noun,e.g.,Most authorities agree that play is an essential part of a childs development. The essential character of the village has not changed in over 300 years.,Unit 2 Part II Main Reading,n. usu. pl. something that is important because it is necessary for life or for do

31、ing something,e.g.,The apartment contained the basic essentials for bachelor life. We left in a hurry and only had time to pack a few essentials.,Unit 2 Part II Main Reading,9. The end products are then distributed to national electrical grids and small turbines owned by individuals to distribute el

32、ectricity to far-flung areas and homes. (L43),其最终产品被输送到国家电网以及个人的小型涡轮机，来把电输送到偏远的地区和家庭。,【译文】,Unit 2 Part II Main Reading,to supply goods to shops and companies in a particular area,e.g.,Milk is distributed to the local shops by Heralds Dairies., to spread something over a large area,e.g.,Whenever spri

33、ng comes, the gardener will distribute grass seed over the lawn.,e.g.,During the war, all foods were distributed in a planned way.,1) distribute vt. to give things to a large group of people, esp. in a planned way,Unit 2 Part II Main Reading,e.g.,Most of them are from countries in the region, with s

34、everal from far-flung locations such as Helsinki and New Zealand. There are hundreds of thousands of users sitting at their PCs right now, gathering information from far-flung reaches of the globe.,2) far-flung a. remote, spread out over a very large area,Unit 2 Part II Main Reading,Holes are drille

35、d in certain regions, and the magma and radioactive decay that can be found underneath produce steam. (L52),在某些地区钻孔，在下面发现由岩浆和放射性衰变产生的蒸汽。,【译文】,Unit 2 Part II Main Reading,the gradual destruction of a society, an institution, a system, an idea, etc.,e.g.,The old civilization was fast falling into deca

36、y.,e.g.,The house had stood empty for years and smelled of decay.,1) decay n.,the natural chemical change that causes the slow destruction of something,Unit 2 Part II Main Reading,e.g.,The vegetables have begun to decay. Sugar can decay the teeth.,2) vi. to destroy something in this way,vi. to becom

37、e less powerful and lose influence over people, society, etc.,Unit 2 Part II Main Reading,e.g.,To repair the car, the mechanic crawled underneath. They used dogs to locate people trapped underneath collapsed buildings.,e.g.,We need to paint the underneath with a rust preventer.,3) underneath ad. / p

38、rep. under or below an object or a surface; at a lower place or level; directly beneath,n. the bottom surface of something, or the part of something that is below or under something else,Unit 2 Part II Main Reading,The downside to geothermal energy is the fact that it is expensive to build geotherma

39、l power plants, and to ensure that no harmful by-products are going to be produced in the process, geothermal plants must be created accordingly. (L56),地热能的不足之处就是修建地热发电厂的费用太高，而且为了确保在发电过程中不会产生有害副产品，又不得不修建地热发电厂。,【译文】,Unit 2 Part II Main Reading,downside n. a negative aspect of something that is genera

40、lly positive （+of/to）,e.g.,The downside of this approach is a lack of clear leadership. The downside to owning your own business is working very long hours.,Unit 2 Part II Main Reading,accordingly ad. 1) in a way that is appropriate to the particular circumstances,e.g.,Children are sensitive to disa

41、pproval and adjust their behavior accordingly. I told them what changes I wanted made and they acted accordingly.,e.g.,The cost of materials rose sharply last year. Accordingly, we were forced to increase our prices.,2) because of the reason given,Unit 2 Part II Main Reading,date back to (L66) = dat

42、e from to have existed since a particular time in the past,e.g.,Their friendship dates back to / dates from college days. These plant fossils date back to the age of the dinosaurs.,Unit 2 Part II Main Reading,Hydroelectric plants today still use the same basic principle as the historical waterwheel,

43、 but with some variations. (L68),今天的水力发电厂所用的原理仍然与过去的水车相同，只是有一些变化而已。,【译文】,Unit 2 Part II Main Reading, of or relating to the study of history,e.g.,a startling piece of historical research Lets look at this from a historical standpoint.,1) historical a. happening or existing in the past,e.g.,Was King

44、Arthur a real historical figure? The book provides readers with some interesting historical facts.,Unit 2 Part II Main Reading,This is a historic occasion. They were lured by a curiosity to see the historic spot.,2) historic a. important in history, or likely to be considered important at some time

45、in the future历史上著名（或重要）的；可名垂青史的,这是具有重大历史意义的时刻。,他们被好奇心驱使去看古迹。,Unit 2 Part II Main Reading,the same thing presented in a slightly different form,e.g.,an interesting variation on the theme of betrayal and revenge,3) variation n.,e.g.,There are wide regional variations in house prices.,a difference or c

46、hange from the usual amount or form of something,Unit 2 Part II Main Reading,There are issues with the use of hydroelectricity. (L75),人们对于利用水力发电看法不一。,【译文】,issue n. an important problem or subject that people are arguing about or discussing,习惯用语 raise the issue (= say that a problem should be discuss

47、ed) something is not the issue spoken (= used to say that something is not the important part of what you are discussing) 口 not be an issue (= not be a problem) 不是问题 avoid/dodge/duck/evade the issue (= avoid discussing a problem or subject),Unit 2 Part II Main Reading,confuse/cloud the issue (= make

48、 a problem or subject more difficult by talking about things that are not directly connected with it) at issue: the problem or subject at issue is the most important of what your are discussing or considering 问题中心，问题的关键 take issue with: to disagree or argue with someone about something （向某人对某事）提出异议,

49、n. a magazine or newspaper printed for a particular day, week, or month,the latest issue of Times,Unit 2 Part II Main Reading,pose (L75) vt.,e.g.,This could pose a threat to jobs in the coal industry.,e.g.,His resignation poses the question of whether we now need a new leader.,to cause a problem, da

50、nger, difficulty, etc. eg. pose a problem / threat / challenge 导致问题 / 造成威胁 / 提出挑战,pose a question to ask a question, especially one that needs to be carefully thought about,Unit 2 Part II Main Reading,stay in a particular position so that someone can photograph you or paint you,e.g.,She posed and sm

51、iled for the cameraman. She was employed by the art school to pose for student artists.,n. the position in which someone stands or sits, especially in a painting, photograph,e.g.,He sat in a relaxed pose. The model was asked to adopt various poses for the photographer.,Unit 2 Part II Main Reading,16

52、. fuel up (L94) to be put fuel into,e.g.,Its amazing that some planes can fuel up in mid air. The ship will put in Shanghai to fuel up.,Translation of the Texts,For Main Reading,Unit 2 Part II Main Reading,Task 2 (Page 39),1. Answer questions,2. Write Summary,3. Advantages and disadvantages,Answer t

53、he following questions.,Task 2 Understanding Main Ideas and Important Details in the Text,Task,They are of great help to cut down the amount of toxins, which are by-products of the consumption of energy.,Unit 2 Part II Main Reading,What can renewable energy sources do to decrease greenhouse gases an

54、d pollutants?,What are the most common sources of renewable energy?,Solar energy, wind energy, geothermal energy, hydroelectricity, and biofuels.,Unit 2 Part II Main Reading,According to this passage, what renewable energy sources have been used since ancient times?,Solar energy, wind energy and hyd

55、roelectricity.,5) What are the advantages of biofuels?,The advantages of biofuels are that they contain no petroleum, and they are nontoxic and biodegradable.,It never has a constant speed or direction.,Unit 2 Part II Main Reading,What is the main disadvantage of wind energy?,2. Based on your answer

56、s to the above questions, write a brief summary of the text.,Unit 2 Part II Main Reading,Review the text to find information about the advantages and disadvantages of renewable sources. List the points in the table below.,Unit 2 Part II Main Reading,Unit 2 Part II Main Reading,It is easy for people

57、to be able to benefit from solar power.,It is limited and cannot be used on nighttime or rainy days.,solar energy,Advantages:,Disadvantages:,Unit 2 Part II Main Reading,wind energy,Advantages:,Disadvantages:,It doesnt produce any by-products that can be harmful to the environment.,It never has a con

58、stant speed or direction.,Unit 2 Part II Main Reading,geothermal energy,Advantages:,Disadvantages:,Because the earths crust continuously decays replenishing the heat, geothermal energy remains a renewable energy.,It is expensive to build geothermal plants.,Unit 2 Part II Main Reading,hydroelectricit

59、y,Advantages:,Disadvantages:,Electricity can be generated by using the kinetic energy of water.,It poses a problem for fish and aquatic plants on both sides of the dam.,Unit 2 Part II Main Reading,biofuels,Advantages:,Disadvantages:,Not mentioned.,They contain no petroleum, and they are nontoxic and biodegradable.,Related Reading,Language Points,Tasks,Translation of the Texts,Language Points,Unit 2 Part II Related Reading,1. It sounds like science fiction, yet it is one of a number of seemingly far-out ideas being taken very seriously by scientists and engineers whose g