必修五Unit1演示文稿4.ppt

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1、Unit 1 Great Scientists Unit 1 Great Scientists Who is he?Who is he?A great scientist,Father of Hybrid RiceThe man who puts an end to hunger He is YuanlongpingMy secret of success is knowledge,swink,inspiration and opportunity.我成功的秘诀：知识、汗水、灵感、机遇。我成功的秘诀：知识、汗水、灵感、机遇。”Who is he?Who is he?He is called t

2、he greatest scientist in the 20th century.He is famous for the Theory of Relativity.He is Albert EinsteinImagination is more important than knowledgeThere are some great scientific achievements that have changed the world.Can you name some of them?What kind of role do they play in the field of scien

3、ce?Do these achievements have anything in common?Match the inventions with their inventors below before you answer all these questions.Warming Up:Alexander Bell electricity Thomas Edison the First telephoneLaite Brothers the electric LampMadame Curie black holes in UniverseFranklin Theory of Gravity

4、Steven Hawking the First PlaneElbert Einstein RadiumIsaac Newton the Theory of RelativityQuiz Questions(P1)阿基米德阿基米德 (Archimedes)Charles DarwinThomas NewcomenGregor MendelMarie CurieThomas EdisonLeonardo da VinciHumphry Davy张张衡衡Stephen Hawkingmatch themPara 1Para 2Para 3Para 4Para 5Para 6Para 7 7 ste

5、psDraw a conclusion Think of a method Collect results Make a questionFind a problem Analyse the results Find supporting evidenceFast-readingWhat is the main idea of the passage?A.John Snow was a well-known doctor in London.B.The case of cholera was polluted water.C.The source of all drinking water s

6、hould be examined.D.How John Snow collected,analysed data and found the cause of the disease and solved it.the content of the textPara.1 Find a problem.John Snow was an doctor in London who Queen Victoria as her personal .He thought about helping ordinary people to cholera.Though the cause and the o

7、f it were unknown,he wanted to face the and solve the problem.expertattendedphysicianexposedcurechallengeReading carefullyWhat caused cholera?What is the problem?Para.2 Make a question:Reading carefullyTwo theories(ideas):1.Cholera multiplied in the air.2.People absorbed it into their bodies with th

8、eir meals.Para.3 Think of a method Reading carefully1.What happened in 1854?2.How many people died in 10 days?3.What did John Snow do at that time?Cholera outbreak hit London.More than 500He suspected the second theory was right and began his enquiryA map of Broad StreetWhat method did he use?Broad

9、StreetMany deaths happened here.No death happened here.Public housePara.4 Collect results Reading carefullyThese families had not drunk the water from the Broad Street pump.It seemed that the water was to blame for cholera.？Which house has the largest number of deaths in this map?A.No.12 B.No.2 C.No

10、.38 D.No.29 Para.5 Analyse the results Reading carefully1.What happened to the pump water?2.what did the people do？The water was from the river polluted by the dirty water from London.Remove the handle from the water pump so that it could not be used.Para.6 Find supporting evidenceReading carefullyW

11、hat s the extra evidence?A woman and her daughter who lived far away but drank the water also died.Para.7 draw a conclusion Reading carefullyTo prevent cholera from spreading again,what did John Snow do?Suggested that the source of all water supplies be examined.Instructed the water companies not to

12、 expose people to the polluted water any more.The polluted water caused cholera.Draw a conclusionFind a problemMake a questionThink of a methodCollect resultsAnalyse the resultsPara 1Para 2Para 3Para 4Para 5Para 6Find supporting evidencePara 7Review 7 steps that John Snow tookSteps:What/How?1.Find a

13、 problem2.Make up a question3.Think of a method4.collect resultsJohn Snow Defeats“King Cholera”What causes cholera?Which theory is correct?using a mapMark the deaths on the map12346.Repeat if necessary7.Make a conclusion5.Analyse resultsfind out the reasons for deathsFind other evidence to make sure

14、 the conclusionPolluted water carried the disease566SummaryJohn Snowa doctor，_ Queen Victory as her personal _.But he was willing to help ordinary people _ cholera.Many people died _ there was an _.He wanted to face the _ and solve the problem.Two theories caught her attention.The first suggested th

15、at cholera multiplied in the air.The second suggested that people _ this disease into their bodies and the disease _ the body.John Snow _ the second was right but heattendedphysicianexposed toevery timeoutbreakchallengeabsorbedattackedsuspectedneeded evidence.When another outbreak hit London in 1854

16、，he was ready to begin his._ and tried to get information.He found that most of the deaths were near a water _ and the spread of the disease was _ water.With the evidence，he was able to _ that polluted water carried the virus.After that，he suggested the source of all the water supplies _.Finally“King Cholera”was _.enquirylinked toannouncebe examineddefeated pump