高中英语 Unit 1 Great Scientists（第2课时）Warming up and Reading课件 新人教版必修5

Great scientistsWords and expressionsPre-ReadingPre-Readingrelating to science, or using the organized methods of science.a scientific discoverya scientific experimenta scientific theory a serious infection of the bowels caused by drinking infected water or eating infected food, causing diarrhoea, vomiting and often death.ReadingReadingDO YOU KNOW WHAT DID THIS MAP WAS USED FOR IN 1854?Finding out the cause of Cholera. Who defeats “King Cholera“? What happened in 1854? How many people died in 10 days? Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 Cambridge Street?TASK 1:SKIM AND SCAN1.Who defeats “King Cholera“?2. What happened in 1854?3. How many people died in 10 days?John SnowCholera outbreak hit London.5004. Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 Cambridge Street?These families had not drunk the water from the Broad Street pump.A map of Broad StreetWhat method did he use?Broad StreetPublic houseDraw a conclusionFind a problemMake up a questionThink of a methodCollect resultsAnalyse the resultsPara 1Para 2Para 3Para 4Para 5Para 6Match themAnalyse resultsPara 7TASK 2Read and answer1 Why couldnt the cholera be under control at first?2 Which theory did John Snow believe in?Neither its cause, not its cure was understood.People absorbed cholera into their bodies with their meals.3 John Snow finally proved the theory he believed by _. A. gathering information with the help of a map B. looking into the source of the water for Broad Street and Cambridge Street C. separating those who suffered cholera from those who didnt D. both A and B4. To prevent the cholera from spreading again, what did John Snow do? Suggested that the source of all water supplies be examine. Suggested that new methods of dealing with polluted water be found. Instructed the water companies not to expose people to the polluted water anymore.TASK 3Mind Map of the textJohn Snow began to test two theories.An outbreak of cholera hit London in 1854.John Snow marked the deaths on a map.He announced that the water carried the disease.John Snow investigated two streets where the outbreak was very severe.King Cholera was defeated.He found that most of the deaths were near a water pump.He had the handle removed from the water pump.21473856Read the passage and number these events in the order that they happened.Discussion: Discuss the following questions in groups of four.1.2.3.Cholera was a 19th century disease. What disease do you think is similar to cholera today ? Why?John Snow believed Idea 2 was right. How did he finally prove it?Do you think John Snow would have solved this problem with- out the map? Give a reason. Two diseases, which are similar today, are SARS and AIDS because they are both very serious, have an unknown cause and public health care to solve them.Keys1. No. The map helped John Snow organise his ideas. He was able to identify those households that had had many deaths and check their water-drinking habits. He identified those houses that had had no deaths and surveyed their drinking habits. The evidence clearly pointed to the polluted water being the cause.2. John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water.3.Using the stages for scientific research and Exercise 1, write a short summary of the reading passage.John Snow wanted to find the cause of cholera. He believed that people became ill after eating infected food. He used the next outbreak of cholera to test his idea. He studied a small area of houses which got their water from the same pump. Many people in the area died. John Snow showed that this was because the water in the pump was infected. He showed that cholera could be defeated if people drank clean water.