（2019版）新人教版选择性必修第二册Unit 1Reading and thinking ppt课件 (3).pptx

1、Science and scientistsTo raise mew questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.1. Enable the Ss to get to know some knowledge about Cholera.2. Enable the Ss to understand the passage well.3. Let the Ss learn s

2、ome reading skills by scanning and skimming. 4.Tolearnfromthegreatscientistsanddevelopthenoblespirits.Lead inThere are some great scientific achievements that have changed the world.Name some famous scientists you know and tell something about them.Who is he?He put forward a theory about black holes

3、.Stephen HawkingLead inWho is he?Archimedes (阿基米德)Which scientist discovered that objects in water are lifted up by a force that helps them float?Who is she?Tu Youyou She is the first Chinese Nobel laureate in physiology or medicine and the first female citizen of China to receive a Nobel Prize.Lead

4、 inlaureate lrit lrit n. 获奖者，荣誉获得者What do you know about the great scientist?Who is he?Zhong Nanshan, who has been committed to the study, prevention and treatment of major respiratory diseases and significantly contributed to the COVID-19 fight, was recommended for the Medal of the Republic nominat

5、ion.coronavirusbe infected withconfirmed/suspected casesvaccine（疫苗）Besides coronavirus, what other kinds of epidemics（流行病） do you know? Bird-flu malaria plague（鼠疫） Ebola Smallpox（天花）CholeraJohn Snow Defeated “King Cholera”What is Cholera?Who is John Snow?How did he defeat Colera? Look at the picture

6、, the title and the map, guess what the content of the text is. Then skim it quickly to see if you are right. The text is mainly about _ and _ he defeated king cholera.howJohn SnowStep 1Fast -readingRead the passage quickly and fill in the following blanks with suitable words.Paragraph 1：Find a prob

7、lem: What caused a _?Paragraph 2：Ask a question：Which _ is right?Paragraph 3: Think of a method：Gathered _，analyzed the results and removed the _ of the pump.Step 1Fast -readingcholeratheoryevidencehandleParagraph 4：Draw a conclusion:The truth was that pump had been _ by waste.Paragraph 5: Take meas

8、ures:Water companies began to sell clean water and the threat of the disease _.John is considered the _ of epidemiology.infecteddecreasedfatherKey words of each paragraph :Find supporting evidenceThink of a methodAsk a questionFind a problemdraw a conclusion7 stages of scientific researches in right

9、 orderCollect dataAnalyze the results1. Why was the disease called “King Cholera”?Cholera used to be one of the most feared diseases in the world,which caused severe diarrhoea, dehydration, and even death.And when an outbreak of cholera hit Europe, millions of people died from the disease.Read Para

10、1 carefully and answer the questions.2.What was Snow like and how did he feel about Cholera?As a young doctor, John Snow became frustrated because no one knew how to prevent or treat cholera.In time, he rose to become a famous doctor, and even attended to Queen Victoria when she gave birth.3.What in

11、spired John Snow according to this paragraph?His desire to destroy Cholera once and for all.1.How did doctors think Cholera spread?Read Para 2 carefully and answer the questions.In general,doctors in those days had two contradictory theories. One theory was that bad air caused the disease.Another wa

12、s that cholera was caused by an infection from germs in food or water.When an outbreak of cholera hit London in 1854, Snow began to investigate.2.What was Snows opinion about the theories?Snow subscribed to the second theory, but he still needed proof. 3.What did Snow do then?A map of Broad Street-”

13、Cholera Map”A map of Broad Street-”Cholera Map”Read Para 3 carefully. What method did Snow use?1. Which houses had more than 4 deaths and which had no death in Broad Street?2.What did Snow conclude?Multiple deaths happened here.No death happened here.Finding EvidenceRead Para 2 and 3 again to comple

14、te the chart.It was believed that cholera was caused by _ or germs in _.The pump water carried _.Many deaths occurred near the _ in Broad Street.Some people who lived near the pump worked in the pub and _ drunk the water from the pump ,and lived.A woman and her daughter had died after _, because she

15、 had the water_ every day.Snow began by _ the places where people _.Snow had the handle of the pump _.ABCDEbad airfood or watermarking on the mapdied had livedwater pumphad notmoving away from Broad Streetdelivered to her housecholera germsremovedSupporting evidenceF1.What caused choleras outbreak i

16、n the Broad Street?Read Para 4 carefully and answer the questions.The truth was that the water from the Broad Street pump had been infected by waste.2.How were people infected with the virus of cholera?Some companies sold water from the River Thames that was polluted by raw waste. The people who dra

17、nk this water were much more likely to get cholera than those who drank pure or boiled water.The result:Through Snows tireless , water companies began to sell , and the threat of cholera around the world saw a substantial . , cholera is still a problem.Each year, of people around the world get chole

18、ra and many it.effortsclean waterdecreaseHowevermillionsdie fromRead Para 5 carefully and fill in the blanks.Snows contribution:Fortunately, we now know how to cholera， the work of John Snow. , in his use of maps and statistics, Snow the way scientists study diseases.Snows achievement:Snow is consid

19、ered .preventthanks toMoreovertransformedthe father of modern epidemiologyStep 3Post-reading John Snow was a well-known _ in London in the _ century. He wanted to find the _ of cholera in order to help people _ it. In 1854 when a cholera _ London, he began to gather information. He _ on a map _ all

20、the dead people had lived and he found that many people who had _ (drink) the dirty water from the _ died. So he decided that the polluted water _ cholera. He suggested that the _ of all water supplies should be _ and new methods of dealing with _ water be found. Finally, “King Cholera” was _.Consol

21、idation: fill in the blanks based on the text.gather information 习惯搭配，意为“搜集信息” gather vt. 收集；使聚集 water supplies 习惯搭配，意为“水源供应” supply n. 供给，补给；供应品 Retell the passage according to below: John Snow was a well-known _ in London in the _ century. He wanted to find the _ of cholera in order to help people

22、 _ it. In 1854 when a choler _ London, he began to gather information. He _ on a map _ all the dead people had lived and he found that many people who had _ (drink) the dirty water from the _ died. So he decided that the polluted water _ cholera. He suggested that the _ of all water supplies should

23、be _ and new methods of dealing with _ water be found. Finally, “King Cholera” was _.doctor19th causehitmarkedpumpsourceexaminedpolluteddefeatedinfected withwheredrunkcarriedFather of hybrid ricekeep people away from hungerDespite the danger of infection, devote to the research of COVID-19 What qualities and scientific spirits do they have in common?Discussion感谢聆听感谢聆听