北师大-必修-7-Unit-20-Lesson3-课件.ppt

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.However,it is possible to single out a few pioneers of the 20th century.First readingStrategy 1 General IdeaA.the process of scientific breakthrou

3、ghs.B.scientific discoveries in the 20th century.C.pioneers in scientific discoveries of the 20th century.The general idea isAlbert Einstein Edwin Hubble other galaxies Alexander Fleming penicillin Eckert&Mauchlythe first computer Percy Spencer microwaveE=mcA.the process of scientific breakthroughs.

4、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 general idea isAlbert Einstein Edwin Hubble other galaxies Alexander Fleming penicillin Eckert&Mauchlythe first computer Percy Spencer mi

5、crowaveE=mcSecond readingStrategy 2 Important WordsParagraph 1FieldsChanges_advancesdiscovering _ of diseasessurgical _ replacing diseased with _ ones_the introduction of _writing letters _flying around the worldKnowledge of the world and space_ the atomMedical CommunicationsTransportemailing spliti

6、ngmobile phones procedures the causes processdonatedorgansParagraph 3 One of the 20th centurys premier scientists was Albert Einstein,who used to be a clerk working in the Patent Office.the most important*This outspoken young man was rocking his one-year-old baby when he was suddenly inspired.*Einst

7、ein 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 sentences!This outspoken young man was rocking his one-year-old baby when he was suddenly inspired.Please translate the two sentences!ho

8、nest 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 changeablePlease translate the two sentences!Paragraph 41.How did Edwin Hubble explore our galaxy?2.What did Edwin Hubbles discovery prove?1.How di

9、d 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 discovery prove?His discovery proved that the universe was vastly lager than had previoursly been thought.Paragraph 6 During the Second

10、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,which _ 100 feet long by over 10 feet high and _ over 30 tonnes,was the worlds first computer.With 18,000 _,thousands of circuits and 600

11、0 switches,it used so much energy that when it was turned on,the lights in the local town _!ways of improvingwrestle with the problemmeasuredweighedtubeswent outbyParagraph 5&7What do they have in common?Alexander FlemingPercy Spencerhow to make the discoverythe influence of the discovery Alexander

12、FlemingPercy Spencerleave a dish,double-check,a blue mouldkill bacteria and save livesa chocolate melting in his pocket,by mistakeprepare meals in minutesHappy Accients!by accident霉菌霉菌Symphony of ScienceQuote.Unquote Nature made penicillin,I just found it.1.Using the given expressions,describe one s

13、cientist and his discovery.2.Tell us what you can learn from him and your understanding of Scientific Spirit.Voice Your OpinionVoice Your OpinionVoice Your OpinionVoice Your Opinion Alexander Fleming went on holiday,leaving a dish with bacteria in his laboratory.On returning,he noticed something str

14、ange.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 to save lives.However,in front of the amazing outcome,this great scientist remained modest.Alexander said that nature rather than he

15、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