Unit 1 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 John Snow Defeats “King Cholera” By the end of this period, you will be able to: find out the stages of scientific research in this passage; learn about John Snow’s research process and analyze John Snow’s characters； express your idea on the given topic through creative thinking; analyze the structure of Problem-Solution pattern. Learning objectives Lead-in What kinds of epidemics(流行病) do you know? Do you know cholera? Cholera loss of liquid (缺水) severe vomiting (呕吐) diarrhea (腹泻) It begins in the stomach and a severe case can lead to death without immediate treatment. Pre-reading John Snow Defeats “King Cholera” Who ? How ? What ? While-reading Activity 1 Read for the main idea and check predictions. Para1 Para 2 Para 4 Para 5 John Snow desire to destroy cholera. He decided to prove the second theory was correct. John began his study by marking on the map . Finally，he found out the truth of infection of cholera. John Snow ‘s great contributions . Para 3 How How analyze the results Task 1 Put the seven research stages in order Activity 2 Read for stages collect data ask a question find supporting evidence draw a conclusion think of a method find a problem 1 2 3 4 5 6 7 Para.2 Stage 1 find a problem contradictory proof subscribe to Task 2 Find the seven stages in Para.2 & 3 Para.2 Stage 2 ask a question investigate determined Para.3 Stage 3 think of a method mark exact Para.3 Stage 4 collect data Para.3 Stage 5 analyze the results multiple However no deaths the water pump was to blame suspect Para.3 Stage 6 find supporting evidence What’s more Para.3 Stage 7 draw a conclusion As a result of this evidence,... announce Activity 3 Read for detailed information in Para.1 Cholera 1. What？ It used to be __________________________ in the world，because it causes _________________________________________. 2. When？ _____________________. 3. Where？ _______. 4. What results？ ___________________________________. one of the most feared diseases severe diarrhoea，dehydration，and even death In the early 19th century Europe Millions of people died from the disease Activity 3 Read for detailed information in Para.2 & 3 Snow had the_______ of the pump removed. E It was believed that cholera was caused by _______ or germs in _____________. A Snow __________ _______the places where people who _____ had lived. B bad air food or water marked on died The pump water carried____________. D cholera germs a map Steps in the research 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 ____________ ______________. C water pump had not from the pump drinking water handle Snow had the_______ of the pump removed. E It was believed that cholera was caused by _______ or germs in _____________. A Snow __________ _______the places where people who _____ had lived. B bad air food or water marked on died 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 ____________ ______________. C water pump had not from the pump The pump water carried____________. D cholera germs handle a map Research method theories process evidence conclusion solution drinking water Activity 3 Read for detailed information in Para.2 & 3 Activity 3 Read for detailed information in Para.4 & 5 1. What caused the outbreak of cholera in London? A. Bad air B. Water infected by raw waste C. Polluted air D. Water polluted by the air 2.Where does this passage probably come from? A．A newspaper. B．A medical report. C．A book review. D．A TV interview. √ Activity 1　Discussion 1. What questions would you ask to get the following answers? Q: What ______________________________? A: Snow thought that cholera was caused by germs in food or water. Q: Why _________________________________________? A: Snow had the handle of the pump removed so that it could not be used. Q: How ___________________________? A: The cholera threat was defeated thanks to the work of John Snow. caused cholera according to Snow did Snow have the handle of the pump removed was the cholera threat defeated Post-reading 2. What qualities do you need to be a scientist? determination devotion hard work strict attitude selflessness creativity passion Activity 2　Summary Fill in the following blanks with suitable words. In the early 19th century，an outbreak of cholera hit Europe,1._______ (cause) millions of deaths.Seeing this，John Snow became 2.__________(frustrate) because no one knew how to prevent or treat cholera.At that time, doctors 3.____(have) two theories to explain how cholera spread.One was that bad air caused the disease and another was that cholera was caused by an infection from germs in food or water.Consequently，when an outbreak of cholera hit London in 1854，John Snow discovered that in two particular streets 4.___ cholera outbreak was so severe that over 500 people died in ten days.He was determined 5._______ (find) out why.Through his serious investigation，he found it was the pump water in Broad Street containing germs 6.____ resulted in the outbreak of cholera.Therefore，he had the handle of the pump 7._______ (remove) so that it could not be used.Through this intervention，the disease was stopped in its tracks. causing frustrated had the to find that removed It turned out that the water from the Broad Street pump 8._________________(infect) by waste.Moreover，Snow was later able to show a link 9._______ other cases of cholera and the different water companies in London.Through Snow’s tireless efforts，water companies began to sell clean water，and the threat of cholera around the world saw a substantial decrease.10.___________(fortunate)，we now know how to prevent cholera，thanks to the work of John Snow. had been infected between Fortunately Thank You Lavf58.29.100 Packed by Bilibili XCoder v2.0.2 $$