《北师大必修7Unit20Lesson3课件.ppt》由会员分享，可在线阅读，更多相关《北师大必修7Unit20Lesson3课件.ppt（34页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、Loading new Frontiersnew FrontiersScientific BreakthroughsIn the 20th century,the world changed completely.What led to the changes?Discoveries!Brain Storming Name the discoveriesCan you single out the mostimportant one?pick outairplane microwave ovenmobile phonecomputermedicine a situation in whichi
2、t is very difficult to decide what to doIf you had to choose the most important discovery of the 20th century,you would have a real dilemma on your hands.Percy Percy SpencerSpencerAlexanderAlexanderFlemingFlemingEdwin Edwin HubbleHubbleEckertEckertAlbertAlbertEinsteinEinsteinMachlyMachlyHowever,it i
3、s possible to single out a few pioneers of the 20th century.First readingStrategy 1 General IdeaA.the process of scientific breakthroughs.B.scientific discoveries in the 20th century.C.pioneers in scientific discoveries of the 20th century.The general idea isAlbert Einstein Edwin Hubble other galaxi
4、es Alexander Fleming penicillin Eckert&Mauchlythe first computer Percy Spencer microwaveE=mcA.the process of scientific breakthroughs.B.scientific discoveries in the 20th century.C.pioneers in scientific discoveries of the 20th century.C.pioneers in scientific discoveries of the 20th century.The gen
5、eral idea isAlbert Einstein Edwin Hubble other galaxies Alexander Fleming penicillin Eckert&Mauchlythe first computer Percy Spencer microwaveE=mcSecond readingStrategy 2 Important WordsParagraph 1FieldsChanges_advancesdiscovering _ of diseasessurgical _ replacing diseased with _ ones_the introductio
6、n of _writing letters _flying around the worldKnowledge of the world and space_ the atomMedical CommunicationsTransportemailing splitingmobile phones procedures the causes processdonatedorgansParagraph 3 One of the 20th centurys premier scientists was Albert Einstein,who used to be a clerk working i
7、n the Patent Office.the most important*This outspoken young man was rocking his one-year-old baby when he was suddenly inspired.*Einstein then showed in his“theory of relativity”that not even time,mass or length are constant they change according to our experience of them.Please translate the two se
8、ntences!This outspoken young man was rocking his one-year-old baby when he was suddenly inspired.Please translate the two sentences!honest Einstein then showed in his“theory of relativity”that not even time,mass or length are constant they change according to our experience of them.not changeablePle
9、ase translate the two sentences!Paragraph 41.How did Edwin Hubble explore our galaxy?2.What did Edwin Hubbles discovery prove?1.How did Edwin Hubble explore our galaxy?Using the most high-powered telescope of the time,he began the long,slow process of exploring our galaxy.2.What did Edwin Hubbles di
10、scovery prove?His discovery proved that the universe was vastly lager than had previoursly been thought.Paragraph 6 During the Second World War,the US Navy was looking for _ the accuracy of their missiles.So Eckert and Mauchly were asked to _ and produce a machine to do the job.This huge machine,whi
11、ch _ 100 feet long by over 10 feet high and _ over 30 tonnes,was the worlds first computer.With 18,000 _,thousands of circuits and 6000 switches,it used so much energy that when it was turned on,the lights in the local town _!ways of improvingwrestle with the problemmeasuredweighedtubeswent outbyPar
12、agraph 5&7What do they have in common?Alexander FlemingPercy Spencerhow to make the discoverythe influence of the discovery Alexander FlemingPercy Spencerleave a dish,double-check,a blue mouldkill bacteria and save livesa chocolate melting in his pocket,by mistakeprepare meals in minutesHappy Accien
13、ts!by accident霉菌霉菌Symphony of ScienceQuote.Unquote Nature made penicillin,I just found it.1.Using the given expressions,describe one scientist and his discovery.2.Tell us what you can learn from him and your understanding of Scientific Spirit.Voice Your OpinionVoice Your OpinionVoice Your OpinionVoi
14、ce Your Opinion Alexander Fleming went on holiday,leaving a dish with bacteria in his laboratory.On returning,he noticed something strange.He double-checked and noticed that a blue mould had destroyed the bacteria.In fact,this blue mould was penicillin in nature.A few years later,penicillin was used
15、 to save lives.However,in front of the amazing outcome,this great scientist remained modest.Alexander said that nature rather than he made penicillin.It is not only his achievement but also his personality that matters in this world.His story taught me a lesson:Being modest is an important scientific spirit which I can learn from him and apply to my life in future.Homework Turn your description into a short essay about 80 words.organ