1、Unit 4 The Use of Nanotechnology,In this unit you will: 1. learn about the development of nanotechnology, from the discovery of fullerenes to its latest applications in everyday life; 2. familiarize yourself with the words and expressions related to the theme of the unit; 3. learn to predict and inf

2、er while listening to a lecture; 4. enhance listening skills through non-theme-related audio and video materials; 5. learn to give presentations competently and effectively.,Learning objectives,Part I Theme-Related Activities,Part II Listening Strategies,Part III Extensive Listening,Part IV Communic

3、ation Skills,Part V Assessment Log,Part I Theme-Related Activities,Section I Science Report I,Section II Science Report II,Section III Science Report III,1. Do you know what nanotechnology is? 2. How can nanotechnology be applied in our life?,Lead-in questions:,Unit 4 Part I Section I Lead-in questi

4、ons,Word Bank,Unit 4 Part I Section I Word Bank,Unit 4 Part I Section I Word Bank,Notes,Unit 4 Part I Section I Notes,Task 1 Watch the video clip and then decide whether the following statements are true or false.,1. Americans are more open-minded and optimistic than Germans, when it comes to new fi

5、elds of research. 2. “Nanos” is the Latin word for “dwarf”. 3. Solar cells are used to produce electricity because they are eco-friendly and highly efficient. 4. The anti-reflex glass cannot be widely used in industry due to its high price. 5. The anti-reflex glass can bear a heavy load without shat

6、tering.,F,T,_,_,F,_,F,_,T,_,Unit 4 Part I Section I Task 1,Task,Task 2 Watch the video clip for the second time and then complete the following sentences.,Task,1. The nanoworld is to Professor George Whitesides. In fact, he is the in the world. 2. Plastics , paint becomes scratch- proof, and solar e

7、nergy becomes even in the depths of Asia. 3. There is still when solar cells are integrated into modern architecture.,more than familiar,_,Unit 4 Part I Section I Task 2,most-quoted nanotechnology expert,_ _,conduct electricity,_,internationally competitive,_ _,a noticeable loss,_,4. Nanocoating sav

8、es and increases the energy yield by from eight to two percent. 5. Further development and quality control are of any innovation .,raw materials,_,reducing the reflection of the glass,_,Unit 4 Part I Section I Task 2,part and parcel,_ _,that is ready for marketing,_,【Script】,Unit 4 Part I Section I

9、Task 3,Task 3 Watch the video clip again and then work in pairs to describe the production of anti-reflex glass and its properties. Afterwards, each group will give a brief report to the class.,Task,Script,Unit 4 Part I Section I Script,Word Bank,Unit 4 Part I Section II Word Bank,Unit 4 Part I Sect

10、ion II Word Bank,Notes,Unit 4 Part I Section II Notes,1. According to the video, what will the new type of car emit? A. Oil. B. Hydrogen. C. Oxygen. D. Water. 2. Which of the following is now a major problem in designing cars running on hydrogen? A. Reducing emissions. B. Storing hydrogen. C. Reduci

11、ng vehicle weight. D. Liquefying hydrogen.,Task 1 Watch the video clip and choose the best answers to the questions below.,Task,Unit 4 Part I Section II Task 1,3. What outstanding property makes nanocubes “world champions”? A. Countless pores and channels. B. Tremendous storage capacity. C. Vast sur

12、faces. D. Tiny volume. 4. The behavior of the new nanocubes is similar to that of . A. a sponge C. a PET bottle 5. In the experiment, compared with the red cylinder, the grey one can store . A. twice as much gas C. half as much gas,B. blocks D. suntan lotion B. the same amount of gas D. three times

13、as much gas,Unit 4 Part I Section II Task 1,1. Why was the new type of car designed? 2. What structure enables nanocubes to store large amounts of gas? 3. What was the purpose of the last experiment?,Task 2 Watch the video clip for the second time and give a short answer to each of the following que

14、stions.,Task,To save energy and avoid an energy crisis, with clean energy in mind.,_ _,They have a porous interior. (a large surface to volume ratio / countless pores and channels),_ _,To show the storage capacity of the nanocubes.,_,Unit 4 Part I Section II Task 2,Task 3 Watch the video clip again

15、and speak for two minutes on the topic. Prepare to answer one or two questions from classmates or the teacher after the presentation.,For Reference:,Unit 4 Part I Section II Task 3,Task,Suggested questions and answers: 1. How is hydrogen stored currently? What disadvantages does this have? 2. What d

16、o people need to create nanotubes in a laboratory, apart from materials? 3. How do nanotubes resemble a sponge?,Gas pressure tanks and liquid hydrogen are most common. Both have serious disadvantages, since they require extremely high pressure or low temperature. This makes them prohibitively expens

17、ive for civil use.,_ _ _ _,Unit 4 Part I Section II Task 3,【Script】,One must have a vast knowledge of chemical reactions to create nanotubes.,_ _,They both have a porous structure so that they can store large amounts of liquids.,_ _,Script,Unit 4 Part I Section II Script,Word Bank,Unit 4 Part I Sect

18、ion III Word Bank,Unit 4 Part I Section III Word Bank,Notes,Unit 4 Part I Section III Notes,Task 1 Watch the video clip and choose the best answers to the questions below.,Task,Unit 4 Part I Section III Task 1,1. What does the lotus blossom symbolize in the Asian cultures? A. Perfect beauty. C. Puzz

19、les. 2. Why do substances develop new properties when reduced to nanoparticles? A. They form a fascinating structure. B. They imitate the lotus effect. C. The laws of quantum physics apply. D. The tiny bumps block dirt particles.,B. Purity. D. Secrets.,Unit 4 Part I Section III Task 1,3. In the vide

20、o, how are nanoparticles created? A. Under massive magnification. B. Through the joint efforts of many researchers. C. With the help of laser beams. D. By swirling vapor. 4. Why did the nanotechnologist laugh after his friend is splashed with a glass of wine? A. The friend had a funny expression. B.

21、 He had a better immune system. C. He was wearing a nanocoated shirt. D. The friends shirt was stained in a funny way. 5. According to the video, all of the following fields will benefit from nanotechnology, EXCEPT _. A. computers C. textiles,B. medicine D. agriculture,Unit 4 Part I Section III Task

22、 2,【Script】,Task 2 Watch the video clip for the second time, and then put the following steps for creating nanoparticles in the correct order.,1. Three laser beams converge. 2. Two layers of different materials are prepared. 3. Fine metallic powder is prepared. 4. The metallic powder is vaporized. 5

23、. The sacrificial layer is dissolved. 6. The metallic powder is swirled up. 7. The layers are vapor-coated onto the sacrificial layer. 8. The particles stay nanominute. 9. The covering materials are under tension. 10. The vapor outside the focal point cools down.,Task,3-6-1-4-10-8,_,Script,Unit 4 Pa

24、rt I Section III Script,Part II Listening Strategies,Understanding Lectures: Learning to Predict and Infer,Understanding Lectures: Learning to Predict and Infer,When listening to someone speaking in ones own language, in many situations, one can anticipate what the speaker is going to say nextperhap

25、s not always the exact words, but at least the main ideas. This can also be true when listening to a lecture. While listening, learners need not spend time trying to figure out how all the words make sense. Listening to confirm predictions is easier than listening and trying to understand every word

26、. If one knows how the professor is going to finish his sentence, then the closing words are redundant: one can ignore them and start anticipating the next significant piece of information.,Unit 4 Part II,To determine what to listen to and what to predict, learners need to have a clear idea of what

27、they know, what they want to know, and what they learn, using top-down (由普遍到特殊的) and bottom-up skills simultaneously and fl exibly to construct meaning. Learners can: 1) use knowledge of the subject matter to make predictions about content and vocabulary and check comprehension (See Unit 1); 2) use

28、the lecture topic, purpose, and try to make predictions about discourse structure (See Unit 2);,Unit 4 Part II,3) use knowledge of common presentation practices and the lecturers delivery style to make predictions about how ideas are organized. For example, the introduction is usually followed by a

29、detailed analysis in the form of categorization, exemplification, or comparison and contrast (See Unit 3); 4) use the lecturers intonation, stress, tone, rhythm, and body language to infer his/her purposes and attitudes. For example, falling intonation indicates that the lecturer has finished one id

30、ea or topic, and is about to move on to the next at a higher pitch. Important points are usually spoken more clearly perhaps a bit louder, more slowly, and with greater care.,Unit 4 Part II,5) use contextual clues to predict what will follow: “I think” + an opinion “Theres one point Id like to make”

31、 + an opinion “Im afraid that” + something negative like bad news “Next, “ + another topic or point “Finally,” + a last topic or point “But” + disagreement “It is worth noting” or “I would like to direct your attention to” + an important point “In other words”, “Let me put it this way”, “To put it a

32、nother way”, or “That is to say” + the point just discussed,Unit 4 Part II,6) use knowledge of semantic markers: markers indicating a list: firstly secondly my next point is markers indicating a cause and effect relationship: so thus (we can see) since markers indicating an illustration and exemplif

33、ication: for instance lets take . as an example,Unit 4 Part II, in the first place thirdly last/finally therefore because for example an instance of this was ., markers indicating that an idea contradicts a previous point: but on the other hand although markers indicating a summary: to summarize wha

34、t I have been saying is if I can just sum up markers indicating a time sequence: then after that while,Unit 4 Part II, nevertheless and yet in other words it amounts to this next previously when, markers indicating a condition: if assuming that Lecturers thus self-consciously use speech terms and la

35、nguage terms which serve as signposts on the journey through the lecture. In summary, preparing for a lecture can help students get a general idea of a lecture; understanding the purpose of a lecture can help students know where to focus attention; predicting what is coming next will guide learners

36、to important information.,Unit 4 Part II, unless,Word Bank,Unit 4 Part II Word Bank,Unit 4 Part II Word Bank,Notes,Unit 4 Part II Notes,Nepal Is officially the Federal Democratic Republic of Nepal. It became a republic in May 2008 after being ruled by monarchs or a ruling family for most of its mode

37、rn history in relative isolation. It is a landlocked sovereign state located in the Himalayas and bordered to the north by the Peoples Republic of China, and to the south, east, and west by the Republic of India.,Task Listen to the audio clip, make predictions about what will come next when a pause

38、is given and then check the prediction against what you hear.,Task,Unit 4 Part II Task,the main topic of the lecture,_ _,What nanotechnology can do? a piece of news / the latest example that scientists use nanotechnology to restore blind hamsters sight partially,_ _ _ _ _,Unit 4 Part II Task,give de

39、tailed information about the application of nanotechnology in the news,_ _ _ _ _,How? By building a tiny trellis of nanoparticle fibers to help the impaired nerves to grow/ involving building and manipulating supersmall materials and machines.,_ _ _ _ _ _,Another important point about nanotechnology

40、,_ _ _,how small a nanometer is,_,Unit 4 Part II Task,comparison,_,metric measurements for lengths: millimeter/ centimeter / mile/ micron (e.g. a red ant; an hours walk; the height of a kindergartener; pinkie; a grain of sand; human hair/ a single strand of a spiders web/ bacteria) nano: one-thousan

41、dth of a micron (contrast between you and mountain nano and micron; contrast between you and sun nano and meter),_ _ _ _ _ _ _,practical applications,_ _,the diameter of a DNA helix,_,【Script】,Script,Unit 4 Part II Script,Part III Extensive Listening,I News Reports,II Interview,III Feature Report,IV

42、 Conversations,V Passage Listening,VI Compound Dictation,Word Bank,Unit 4 Part III I News Reports I,Watch the news report and then do the following exercise.,1. Why are scientists trying to make silent e-trucks noisier? A. They are prohibited by law. B. They lead to increased car accidents. C. They

43、are too slow. D. They are making harm to the environment. 2. What sort of sound does the public think electric vehicles should make? A. It should be as quiet as possible. B. It should be decided by the law. C. It should come from science fiction. D. It should sound like Michael Jackson.,Unit 4 Part

44、III I News Reports I,3. According to the report, what did the consultancy, Nevelson, do? A. It has developed the electric car, Elvin. B. It has investigated how the electric car will sound in the future. C. It has developed tools to help car manufacturers make predictions. D. It has investigated how

45、 the cities will sound in the future.,Unit 4 Part III I News Reports I,【Script】,Script,Unit 4 Part III I News Reports I,Word Bank,Unit 4 Part III I News Reports II,1. How long did the reported study last? A. Over two years. B. Over four years. C. Over twenty years. D. Over forty years.,Listen to the

46、 report and then do the following exercise.,Unit 4 Part III I News Reports II,2. What does the study show? A. Coffee drinkers tend to be healthier than non- coffee drinkers. B. Men should drink more coffee to avoid getting prostate cancer. C. Certain elements in coffee may reduce the risk of prostat

47、e cancer. D. Decaffeinated coffee brings more health benefi ts. 3. According to Kathryn Wilson, coffee can . A. harm the human heart B. protect against lung cancer C. lower the risk of type II diabetes D. lead to a stroke,Unit 4 Part III I News Reports II,【Script】,Script,Unit 4 Part III I News Repor

48、ts II,Word Bank,Unit 4 Part III I News Reports III,Listen to the news report and then answer the questions orally afterwards. Compare what you have said with the reference answers provided.,1. Historically, what kinds of devices were used to catch speeders in the U.S.?,Car-mounted radar was used in

49、the 1950s.,_,Unit 4 Part III I News Reports III,2. What opinions do police chiefs and the general public hold about the use of speed cameras? 3. What does the report imply about the Sixth Amendment to the U.S. Constitution?,Police chiefs praise the cameras, because they claim that they force people

50、to drive more slowly, thus lowering the fatality rate in traffic accidents. However, the public is generally against the use of cameras. They argue that speed cameras are just money makers for the police, and they make take policemen off the street. Also, the cameras have little effect on habitual s

51、peeders, and they violate 6th Amendment rights.,_ _ _ _ _ _ _ _,The Sixth Amendment to the U.S. Constitution is about rights of the accused.,_ _,Unit 4 Part III I News Reports III,【Script】,Script,Unit 4 Part III I News Reports III,Word Bank,Unit 4 Part III II Interview Word Bank,Notes,Unit 4 Part II

52、I II Interview Notes,Watch the video clip and then do the following exercise.,1. Richard Smalley discovered fullerenes when _. A. he was working for another chemist B. he was preparing to go to outer space C. he was searching for evidence of life in outer space D. he was studying chemical conditions

53、 in outer space 2. According to Smalley, Bucky Balls have all of the following properties EXCEPT _. A. they are molecules made up of 60 carbon atoms each B. they are extremely stable molecules C. they are the stiffest molecules D. they have the most symmetry among all molecules,Unit 4 Part III II Interview,Unit 4 Part III II Interview,【Script】,3. How many pentagons does each n