◇ Do you know John Snow?John Snow is a well-known doctor in the 19th century in London and he defeated “King Cholera”.◇ Do you know what kind of disease is cholera?It is a kind of terrible disease caused by drinking dirty water and it caused a lot of deaths in the old times and it was very difficult to defeat.◇ Mind Map of the textParagraph 1 Introduction of John Snow and Cholera Find a Problem: What cause the cholera? Paragraph 2 Two theory Make a question: Which is right? Paragraph 3-5 Study of the breakout in 1854Paragraph 3 Think of a method: Test two theory Collect the result: Mark the death Analyse the result: Reason for death and no death Paragraph 4 Analyse the result: Find the resource of the water Paragraph 5 Find supporting evidence: Find more evidence. Draw a conclusion: Cholera was spread by germPolluted water carried cholera Paragraph 6 Prevention of Cholera John Snow defeat King Cholera◇ The passage is written as a report of an experiment and there are 7 steps:1.Find a problem:(发现问题)2.Make up a question:(形成研究主题)3.Think of a method:(找出研究方法)4.Collect results:(收集材料)5.Analyse results:(分析材料)6.Find supporting evidence:(必要时重新分析)7.Draw a conclusion:(得出结论)The problem Nobody knew the cause of the serious disease of cholera. The cause Idea 1: a strange cloud of gas found its victimsIdea 2: people absorbed the disease with meals The method Collect information from the cholera outbreak to prove which theory was correct. The results He found the cause of cholera was the polluted water Idea 1 or 2? Why? Idea 2. Because the information showed that the dirty water carried cholera. The conclusion He defeated cholera by examining the water supply and dealing with the polluted water.
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