Unit1 Science and Scientists Reading and Thinking 课件-2024-2025学年高中英语人教版（2019）选择性必修第二册

Unit 1 Science and Scientists Reading and Thinking 年 级： 高二 学 科：英语（人教版） 1 In this class, you will Learning objectives 1. read about how John Snow defeated “King Cholera” 2. analyze John Snow's scientific research process and methods of defeating cholera 3.figure out the basic scientific research steps and understand the important role of questioning mind in scientific research. 2 Who is he? What do you know about him? Lead- in : predicting 3 Lead- in : predicting cholera Cholera used to be one of the most feared diseases in the world. This illness causes severe diarrhoea, dehydration, and even death. 腹泻 脱水 4 Lead- in : predicting JOHN SNOW DEFEATS“KING CHOLERA” What do you think will be talked about? The passage will be about John Snow and how he defeated “king cholera” 5 The results & significance The truth Fast reading JOHN SNOW DEFEATS“KING CHOLERA” 1st para 2nd-3rd para How? 5th para Who ？What? 4th para 6 Your... _______analyse the results _______ask a question _______draw a conclusion _______collect data _______find a problem _______find supporting evidence _______think of a method 7 In general ,doctors in those days had two contradictory theories to explain how cholera spread. One theory was that bad air caused the disease. The other was that cholera was caused by an infection from germs in food or water .Snow subscribed to the second theory. It was correct, but he still needed proof .Consequently, when an outbreak of cholera hit London in 1854, Snow began to investigate . He discovered that 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。 Fast reading Find a problem 2nd para 8 Snow subscribed to the second theory. It was correct, but he still needed proof .Consequently, when an outbreak of cholera hit London in 1854, Snow began to investigate . He discovered that 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. Ask a question Fast reading 2nd para 9 Detailed reading 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).However , some house holds (such as 20 and 21 Broad Street and 8 and 9 Cambridge Street) had had no deaths .These people worked in the pub at 7 Cambridge Street. Think of a method 3rd para 10 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).However , some house holds (such as 20 and 21 Broad Street and 8 and 9 Cambridge Street) had had no deaths .These people worked in the pub at 7 Cambridge Street. Collect date Fast reading 3rd para 11 Fast reading 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).However , some house holds (such as 20 and 21 Broad Street and 8 and 9 Cambridge Street) had had no deaths .These people worked in the pub at 7 Cambridge Street. Analyse the results 3rd para 12 Fast reading What is more, in another part of London, a woman and her daughter had died of cholera after moving 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. As a result of this evidence, John Snow was able to announce that the pump water carried choleragerms. Find supporting evidence 3rd para 13 Fast reading It seemed that the woman like the water from the pump so much that she had it delivered to her house every day. As a result of this evidence, John Snow was able to announce that the pump water carried cholera germs. Accordingly, he had the handle of the pump removed so that it could not be used. Through this intervention, the disease was stopped in its tracks. Draw a conclusionn 3rd para 14 The stages of a scientific research The 1st stage：find a problem The 2nd stage：ask a question The 3rd stage：think of a method The 4th stage：collect data The 5th stage：analyse the results The 6th stage：find supporting evidence The 7th stage：draw a conclusion 15 Detailed reading John Snow Who? A_________doctor who even attended_______________ when she ... What? He had a desire to_____________ once and for all. famous Queen Victoria destroy cholera 1st para 16 3 1st para cholera What? When? Where? What consequence? It is one of__________________________________because it causes__________________________________ the most feared diseases in the world(once) severe diarrhoea, dehydration,and even death In the early 19th century Europe Millions of people died from the disease “King Cholera” = deadly cholera 17 Complete the research steps Fill in the blanks and finish the research steps: It was 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______________ air food or water marked on a map died water pump hadn’t drinking water from the pump. A B C 18 Complete the research steps The pump water carried____________ The ____________of the pump was removed. D E cholera germs handle 19 Summarize the research steps It was believed that cholera was caused by bad_____ or germs in_________. Snow_____________the places where the people who_______had lived A B air food or water theories marked on a map died process 20 Summarize the research steps 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_______________________ water pump hadn’t drinking water from the pump. evidence 21 The pump water carried____________ The _______of the pump was removed. cholera germs handle D E conclusion solution Summarize the research steps 22 Summarise and review the research steps: It was believed that cholera was caused by bad_____ or germs in_________. marked on a map Snow_____________the places where the people who_______had lived theories The pump water carried____________ The ________of the pump was removed. conclusion solution 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______________ air food or water died cholera germs handle water pump hadn’t drinking water. process evidence 23 Discussion What helped John Snow most in defeating cholera? A. His experience B. His map C... 24 How does it work? What kind of map is it ? What does “__”mean? What does “PH” mean? What does 30, 31,...refer to ? How many deaths were there in house number 19 in Broad Street ? Which house numbers had more than four deaths in Broad Street? Which house numbers had no deaths in Broad Street? Where is a pump? 25 How does it work? What kind of map is it ? (It’s Snow’s cholera map) What does “__”mean? (1 death) What does “PH” mean? (public house) What does 30, 31,...refer to ? (numbers of houses) How many deaths were there in house number 19 in Broad Street ? (2 ) Which house numbers had more than four deaths in Broad Street?(16、37、38&40） Which house numbers had no deaths in Broad Street?（14、20、21、25、27、28&34） Where is a pump?（near house number 40 in Broad Street) 26 The truth What link did he find between the deaths and drinking water? The water was infected by waste the polluted water was sold to or drunk by people the people were infected by cholera Detailed reading 4th para 27 Results and significance What were the suggestions to decrease cholera? Water companies sell clean water. People drink pure or boiled water, and eating clean food. Detailed reading 5th para 28 Results and significance What contributions did John Snow make to science? He helped people know how to prevent cholera. He transformed the way scientists study diseases by using maps and statistics. Detailed reading 5th para 29 30 Thinking Write out the questions according to the answers. 1. Q: How_________________________________? A: Snow thought that cholera was caused 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. did Snow think cholera was caused did Snow have the handle of the pump removed 31 Write out the questions according to the answers. 3. Q：How_____________________________? The cholera threat was defeated thanks to the work of John Snow. was the cholera threat defeated? Thinking Asking questions can help you understand the content. It can also help you think more deeply about that topic 32 Discussion Snow’s work has provided readily available clean water to drink, as well as an emphasis on hygiene such as the need to wash hands after they become dirty. He 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 Snow’s work affected our daily lives? 33 Reflection Why was it John Snow , not other doctors, who defeated King Cholera? Because John Snow was a scientist with____ critical thinking innovation serious scientific approach eagerness to explore 34 Homework If you were given a chance to ask John Snow a question about his research ,what question would you like to ask most? 35 Thank you ! Lavf57.71.100 Packed by Bilibili XCoder v1.0(fixed_gap:False) $$