Unit 1 Reading and thinking （ppt课件） (2)-2022新人教版（2019）《高中英语》选择性必修第二册.pptx

1、FRESH IDEAS Unit1 Science and Scientists BEST SOLUTIONS reading and thinking一一.lead-inDo you know what the people did in the video and why?4of9What have Covid-19 virus brought to us?Come back to 2020 year Do you remember what happened in Wuhan in 2020 year?2of9李文亮2020年武汉1-4月新冠死亡率9.842%2022年奥密克戎0.062

2、%6of9What other infectious diseases do you know?2003 year SARSGUANGDONG 果子狸plague 鼠疫鼠疫土拨鼠土拨鼠Ebola virus disease,EVD埃博拉病毒埃博拉病毒病死率病死率50%非洲，蝙蝠群非洲，蝙蝠群体体70%新发传染病源于动物。新发传染病源于动物。cholera 霍乱霍乱 Discuss the following stages of scientific research in groups.What order would you put them in?1of9_ analyse the res

3、ults _ ask a question_ draw a conclusion _ collect data _ find a problem _ find supporting evidence_ think of a method5of9 ask a questionfind a problem think of a methodcollect data analyse the results find supporting evidenceSTEPS of Scientific Research draw a conclusionJOHN SNOW DEFEATS“KING CHOLE

4、RA”Who is John Snow?How did he defeat cholera?What is King Cholera?Who?How?What?Step2.pre-reading Why is it called King Cholera?What harm does cholera do to people?What is the influence of John Snows study on science?What is cholera?Cholera is an infectious disease that causes severe watery diarrhea

5、(腹泻腹泻),which can lead to dehydration(脱水脱水)and even death if untreated.It is caused by eating food or drinking water containing a bacterium called Vibrio cholera.（霍乱弧菌）（霍乱弧菌）The disease is most common in places with poor sanitation(卫生设施卫生设施),crowding and war.Common locations include parts of Africa,s

6、outh Asia,and Latin America.n.霍乱霍乱Here are some facts about cholera.Try to present them to your partners and consider whether they are the same as you expected.1.Cholera can kill sufferers within a few hours if they are left untreated.2.Researchers have estimated that each year there are 1.3 million

7、 to 4 million cases of cholera,and 21,000 to 143,000 deaths worldwide due to cholera.3.Up to 80%of cases can be successfully treated with oral rehydration solution(口服补液口服补液).4.Safe water and waste control can prevent cholera.5.When there is an outbreak of cholera,it is important to focus on treatmen

8、t and waste control.6.Safe and effective cholera vaccines(疫苗疫苗)are now used to control the disease.7.Today,no country requires proof of cholera vaccination as a condition for entry.Now,lets read the passage to get information about the infectious disease.JOHN SNOW DEFEATS“KING CHOLERA”1.Skim the pas

9、sage to see if the order you decided above was correct,and choose the main idea of the passage.A.John Snow was a well-known doctor in London.B.The cause of Cholera was polluted water.C.The source of all drinking water should be examined.D.How John Snow collected,analysed data and found the cause of

10、the disease and defeated it.Paragraph(s)Main idea2.Skim the passage and use key words to describe each part.12-345What?Who?How?The truthResults and significance3.Use the stages in examining a new scientific idea to describe each paragraph.draw a conclusionfind a problemask a questioncollect datafind

11、 supporting evidenceWhat causes cholera?Which theory is correct?Mark information on a map to find out where people died or did not die.Find other evidence to confirm the conclusion.The water is to blame.The source of all drinking water should be examined so that it is safe.choleraJohn SnowWhat?It is

12、 one of _ because it causes _ _ When?_.Where?_.What consequence?_.the most feared diseases in the worldsevere diarrhoea,dehydration,and even deathIn the early 19th centuryEuropeMillions of people died from the diseaseWho?A _ doctor who even attended to _ when she gave birth.What?He had a desire to _

13、 once and for all.young British Queen Victoria destroy cholera4.Read para.1 and fill in the blanks below.5.Read paras.2-3 and complete the chart below.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

14、Broad Street.Some people _ drunk the water from the pump,and lived.A woman and her daughter died in another part of London after _.The pump water carried _.The _ of the pump was removed.airfood or watermarked on a mapdiedwater pumphadntdrinkingcholera germshandleA.C.B.D.E.water from the pump6.Read p

15、aras.4-5 and answer the questions.1.What caused the outbreak of cholera in London in 1854?_2.Was cholera destroyed completely?_3.How can we prevent cholera?_The water which came from the River Thames and had been infected by waste.No.By drinking pure or boiled water,and eating clean food.4.What cont

16、ributions 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.multiple deaths happened here.No death happened here.The water from the pump was to blame.Public houseClue:free beer from public houseRes

17、ult:The water came from the river which had been polluted by the dirty water from London.Write out the questions according to the answers?1.Q:What _?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.3.Q:H

18、ow _?A:The cholera threat was defeated thanks to the work of John Snow.caused cholera according to Snowdid Snow have the handle of the pump removedwas the cholera threat defeated1.What are the results of Snows tireless efforts?2.What is the significance of Snows effort in making a research to cholera?Give your idea.Read Para.5 and answer questions.lTo the world:lTo yourself:1.how to prevent cholera;2.transformed the way scientists study diseases.1.his spirits in making research;2.his attitude to work.the father of modern epidemiology现代流行病学之父现代流行病学之父THANK YOU