Unit 1 Reading and Thinking-ppt课件--（2022）新人教版(2019新版)高中英语选择性必修第二册.pptx

1、In this class,you will1.get information about how John Snow defeated cholera;2.summarize the stages of scientific research;3.talk about the significance and contribution of Johns work.What is cholera?Cholera is an infectious disease that causes severe watery diarrhea(腹泻腹泻),which can lead to dehydrat

2、ion(脱水脱水)and even death if untreated.It is caused by eating food or drinking water containing a bacterium called Vibrio cholerae.Common locations include parts of Africa,south Asia,and Latin America.Who was John Snow?How did John Snow defeat King Cholera?What is King Cholera?Activity 1:Read the titl

3、e and predict.What does“King”imply in the title?Cholera is powerful and hard to cure.a British doctor.one of the most feared diseases and millions of people died from it in the early 19th century.He conducted research and found out how cholera spread.Activity 2:Read the passage again and find the ma

4、in information in each paragraph on how John Snow defeated King cholera.P1:Cholera hit Europe in the early 19th century and John Snow showed how it could be overcome.P2:John Snow found a problem.P3:John Snow conducted research to stop the disease.adj.manyP4:John found the truth about cholera.P5:John

5、 contributed a lot to how to prevent cholera and how to study diseases.n.流行病流行病学学v.changeSummaryPara.1:Cholera hit Europe in the early 19th century and John Snow showed how it could be overcome.Para.2:John Snow found a problem.Para 3:John Snow conducted research to stop the disease.Para.4:John found

6、 the truth about cholera.Para.5:John contributed a lot to how to prevent cholera and how to study diseases.Summary of how John Snow defeated King cholera._draw a conclusion _draw a conclusion _analyse the results _analyse the results _ask a question_ask a question_find supporting evidence _find supp

7、orting evidence _collect data _collect data _find a problem _find a problem _think of a method_think of a methodActivity 3:Try to put the following stages of scientific research in order.draw a conclusionthink of a methodask a questionfind a problemanalyse the results7 stages of scientific researche

8、s in right orderActivity 3:Try to put the following stages of scientific research in order.collect datafind supporting evidence7 stages of scientific researches in right orderPara.2:In general,doctors in t h o s e d a y s h a d t w o contradictory theories to explain how cholera spread.One theory wa

9、s that bad air caused the disease.Another was that cholera was caused by an infection from germs in f o o d o r w a t e r.S n o w subscribed to the second theory.draw a conclusionthink of a methodask a questionfind a problemanalyse the resultscollect datafind supporting evidence1th stageFind the det

10、ails from the text about each scientific stage.Theory one:caused by the bad airTheory two:caused by germs in food and water subscribe to7 stages of scientific researches in right orderPara.2:In general,doctors in those days had two contradictory theories to explain how cholera spread.He discovered t

11、hat in two particular streets the cholera outbreak was so severe that more than 500 people died in ten days.He was determined to find out why.draw a conclusionthink of a methodask a questionfind a problemanalyse the resultscollect datafind supporting evidence2th stage7 stages of scientific researche

12、s in right orderPara.3:Snow began by marking on a map the exact places where all those who died had lived.There were multiple deaths near the water pump in Broad Street(especially house numbers 16,37,38,and 40).draw a conclusionthink of a methodask a questionfind a problemanalyse the resultscollect

13、datafind supporting evidence3th stageA map of Broad Street-”Cholera A map of Broad Street-”Cholera Map”Map”What method did Snow use?Read the map.1)Which houses had more than 4 deaths in Broad Street?2)Which houses had no death in Broad Street?Multiple deaths happened here.No death happened here.He s

14、uspected that the water from the pump was to blame.Evidence7 stages of scientific researches in right orderPara.3:Snow began by marking on a map There were multiple deaths near the water pump in Broad Street(especially house numbers 16,37,38,and 40).However,some households(such as 20 and 21 Broad St

15、reet,and 8 and 9 Cambridge Street)had had no deaths.draw a conclusionthink of a methodask a questionfind a problemanalyse the resultscollect datafind supporting evidence4th stage7 stages of scientific researches in right orderdraw a conclusionthink of a methodask a questionfind a problemanalyse the

16、resultscollect datafind supporting evidencePara.3:Snow began by marking on a map There were multiple deaths near the water pump in Broad Street(especially house numbers 16,37,38,and 40).However,some households(such as 20 and 21 Broad Street,and 8 and 9 Cambridge Street)had had no deaths.5th stage7 s

17、tages of scientific researches in right orderdraw a conclusionthink of a methodask a questionfind a problemanalyse the resultscollect datafind supporting evidence6th stagePara.3:Snow began by marking on a map Whats more,in another part of London,a woman and her daughter had died of cholera after mov

18、ing away from Broad Street.It seemed that the woman liked the water from the pump so much that she had it delivered to her house every day.Para.3:Snow began by marking on a map As a result of this evidence,John Snow was able to announce that the pump water carried cholera germs.Accordingly,he had th

19、e handle of the pump removed so that it could not be used.Through this intervention,the disease was stopped in its tracks.7 stages of scientific researches in right orderdraw a conclusionthink of a methodask a questionfind a problemanalyse the resultscollect datafind supporting evidence7th stageIt w

20、as believed that cholera was caused by bad _ or germs in _.Snow _ the places where the people who _ had lived.Many deaths occurred near the _ in Broad Street.Some people _ drunk the water from the pump,and lived.A woman and her daughter died in another part of London after _.The pump water carried _

21、.The _ of the pump was removed.airfood or watermarked on the mapdiedwater pumphadntdrinking watercholera germshandleA.C.B.D.E.from the pumpActivity4.Read Para 2 and 3 carefully,complete the chart.theoriesprocessevidenceevidenceevidenceconclusionsolution1.Q:What _?A:Snow thought that cholera was caus

22、ed by germs in food or water.2.Q:Why _?A:Snow had the handle of the pump removed so that it could not be used.3.Q:How _?A:The cholera threat was defeated thanks to the work of John Snow.caused cholera according to Snowdid Snow have the handle of the pump removedwas the cholera threat defeatedActivit

23、y5:Ask and answer.Read Para 4-5 and raise the questions1)Water companies began to sell clean water.2)The threat of cholera around the world decreased.3)He helped people know how to prevnt cholera.4)Snow transformed the way scientists study diseases.2.What contributions did John Snow make?1.What caus

24、ed the outbreak of cholera in London in 1854?1.What caused the outbreak of cholera in London in 1854?2.Was cholera destroyed completely?3.How can we prevent cholera?.He used maps and statistics to analyse where the deaths occurred.He didnt use a microscope.He didnt test the water,nor did he draw blo

25、od or examine patients.The reason was that medical science was not so advanced at that time.What was the most important tool Snow used to defeat cholera?What common medical tools,e.g.,a microscope,didnt he use?Why?lSnows work has provided readily available clean water to drink and an emphasis on hyg

26、iene，such as the need to wash hands.lHe also showed how to prevent cholera epidemics,and transformed the way scientists study diseases,which has allowed for more protection from once common diseases such as cholera.How has John Snows work affected our daily lives?Para.5:Through Snows tireless effort

27、s,water companies began to sell clean water,and the threat of cholera around the world saw a substantial decrease.Moreover,in his use of maps and statistics,Snow transformed the way scientists study diseases.For this reason Discover artemisnin to treat malaria,awarded the Nobel PrizeFather of hybrid

28、 ricekeep people away from hungerDespite the danger of infection,devote to the research of COVID-19The Father of Modern EpidemiologyWhat qualities and scientific spirits do they have in common?DiscussionHomeworkWhy was it John Snow,not other doctors,who defeated King Cholera?Write about your opinion by using the information from the passage.