1、Module 5 Unit 1 Great scientists reading,Do you know how to prove a new idea in scientific research?,7 stages in right order,Fast-reading,John Snow defeats “King Cholera”,British ( 1813 1858) a figure(人物) in the history of public health, epidemiology(流行病學(xué)) and anesthesiology(麻醉學(xué)),What is Cholera?,Ch

2、olera is the illness caused by a bacterium(細(xì)菌) called Vibria cholerae(霍亂弧菌) . It infects peoples intestines (腸), causing diarrhea(腹瀉), vomiting(嘔吐) and leg cramps(抽筋) .,What is the problem?,The cholera was the most deadly disease of its day. Neither its cause, nor its cure was understood.,What cause

3、d cholera?,Para1:Find a problem,Who is John Snow?,a famous doctor in London.,relationship,Para2:make a question: How cholera killed people?,idea 1,idea 2,Cholera multiplied in the air without reason. A cloud of dangerous gas would float around until it found its victims.,People absorbed it with thei

4、r meals.,Para3: Think of a method,to test whether the second theory is correct,Para4: collect the result,Broad Street,Many deaths happened here.,No death happened here.,The water from the pump was to blame.,Public house,Para5:analyze the results: What happened to the pump water?,Remove the handle fr

5、om the pump.,any changes? /,Pare6:Find supporting evidence: What extra evidence did he find?,two other deaths,A woman and her daughter who lived far away but drank the water also died.,draw a conclusion with certainty,The polluted water carried the disease.,Para7: Prevention of cholera,Read the pass

6、age again and fill in the blanks: John Snow was a well-known _ in London in the _ century. He wanted to find the _ of cholera in order to _ it. In 1854 when a cholera _ out, he began to gather information. He _ on a map where all the dead people had lived and he found that many people who had drunk the dirty water from the _ died. So he decided that the polluted water carried cholera. He suggested that the _ of all water supplies be _ and the water companies were_ not to _ people _ polluted water any more. Finally “King