1、选择性必修二Unit 1 Science and Scientists东明一中 贾卫宽What infectious diseases do you know?SARS 非典plague 鼠疫Ebola virus埃博拉病毒埃博拉病毒 cholera 霍乱霍乱Covid-19 新冠新冠smallpox 天花天花cholera 霍乱霍乱Who defeated cholera?John Snow(15 March 1813 16 June 1858)was a British physician and a leader in the adoption of anaesthesia and me
2、dical hygiene.约翰斯诺(1813年3月15日-1858年6月16日)，英国内科医生，麻醉和医疗卫生的领导者。the father of modern epidemiology现代流行病学之父现代流行病学之父 Discuss the following stages of scientific research in groups.What order would you put them in?_ analyse the results _ ask a question_ draw a conclusion _ collect data _ find a problem _ fi
3、nd supporting evidence_ think of a methodJOHN SNOW DEFEATS“KING CHOLERA”Who?How?What?Predicting1.Skim the passage to see if the order you decided above was correct,and choose the main idea of the passage.A.John Snow was a well-known doctor in London.B.The cause of Cholera was polluted water.C.The so
4、urce of all drinking water should be examined.D.How John Snow collected,analysed data and found the cause of the disease and defeated it.draw a conclusionfind a problemask a questioncollect datafind supporting evidenceWhat causes cholera?Which theory is correct?Mark information on a map to find out
5、where people died or did not die.Find other evidence to confirm the conclusion.The water is to blame.The source of all drinking water should be examined so that it is safe.Activity 2:Read for the Structure_.Activity 3:Read for informationPara 1 Who&What?John SnowCholeraa _ doctorbecame _ never _ _ o
6、nce and for allBritish,young and famous_ Queen Victoriaattended tofrustrated lost his desire to destroy choleraone of _ deseasescauses severe _ _millions of people _the disease in the early 19th centurythe most feared diarrhoea,dehydration and even deathdied from1.What problem did the two theories t
7、ry to solve?problemActivity 3:Read for information2.What were the two theories and which did John Snow agree with?Theory one:caused by _Theory two:caused by _bad air germs 3.How did he prove it?questionPara 3What method did he use?How did he finally find out why?marking on a mapAnalyze the map with
8、your group member first and try to ask questions between group members.u Which houses had more than 4 deaths in Broad Street?u Which houses had no death in Broad Street?What result did he get?Any other evidence?What result did he get?Snow suspected that the water pump was to blame.A woman and her da
9、ughter died in another part of London after drinking water from the pump.John Snow was able to announce that the pump water carried cholera germs.John Snow had the handle of the pump removed.The disease was stopped.Activity 4:Read Para 2-3 again for scientific stagesFind a problemAsk a questionActiv
10、ity 5:Read for informationWater companies sold water from the River Thames that was polluted by raw waste,causing people who drank this water to get cholera.lWater companies began to sell clean water.lThe threat of cholera around the world decreased.lHe helped people know how to prevent cholera.lSno
11、w transformed the way scientists study diseases.2.What contributions did John Snow make?1.What caused the outbreak of cholera in London in 1854?TruthPara 4-5Was cholera defeated completely?To prevent cholera from spreading,wed betterdrink pure or boiled water and eat clean food.Activity 5:Read for thinking1.His professional knowledge.2.His strong determination.4.His scientific mind-set.(questioning mind/creative mind)Why was it John Snow,not other doctors,who defeated King Cholera?3.Scientific methods:the use of map and statisticsTHANK YOU
