Unit 1 Science and Scientists Reading and Thinking 课件ppt--（2023新教材）高中英语人教版（2019）选择性必修第二册.pptx

1、Science and ScientistsReading and ThinkingTeaching GoalsEnable the Ss to get to know some knowledge about Cholera.Enable the Ss to understand the passage well.Let the Ss learn some reading skills by scanning and skimming.To learn from the great scientists and develop the noble spirits.学习目标学习目标(1)问题导

2、学问题导学(2)1.Who was John Snow?2.What is King Cholera?3.What does“defeat”mean?4.What did John Snow do about King Cholera?The secientists that we knowTo YouyouYuan LongpingEinsteinWho is he?He played an important role in fighting against Covid-19 and won the Medal of Republic(共和国勋章）共和国勋章）in 2020.Zhong N

3、anshanMany years ago,a terrible disease named cholera in the world killed millions of people.People were very afraid of it,but they didn t know what to do.Luckily,a young doctor decided to find out how to prevent and treat the disease.Finally,the doctor won the battle.John Snow Choleraloss of liquid

4、(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.01020304SARSAIDS05Bird FluCholeraCOVID-19infectious diseases Look at the picture,the title and the map,guess what the content of the text is.Then skim it quickly to see if you

5、are right.The text is mainly about _ and _ he defeated king cholera.howJohn SnowJohn Snow Defeats“King Cholera”点拨精讲点拨精讲2525Skimming:main idea of each paragraphPara1 Para 2 Para 4Para 5 John Snow want to use his knowledge to solve colera.He got interested in two theories explaining how colera killed

6、people.He used the map to prove the second theory was correct.He finally found out that dirty water was the cause of cholera.Finally“kin Cholera”was defeated.Para 3 Read the passage quickly and get the main idea of each paragraph.What?Its one of _ in the world,because it causes _.When?_Where?_What r

7、esults?_the most feared diseasessevere diarrhoea,dehydration and even deathIn the early 19th centuryEuropeMillions of people died from the diseaseCholeraTask2.Read the 1st paragraph quickly and fill in the mind map.Task 1:Find the problem Two theories The first theory bad air caused the diseaseChole

8、ra was caused by an infection from the germs in food or water.Proof was need.The second theory Read the 2nd paragraph carefully and find out the two theories.Task 2:Ask a questionCareful-readingRead Para 2 and 3 again to complete the chart.It was believed that cholera was caused by _ or germs in _.T

9、he 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 died in another part of London after _Snow _ the places where people who_ had lived.Snow had the _ of t

10、he pump removed.ABCDEbad airfood or watermarked on a mapdied water pumphad notdrinking water from the pumpcholera germshandleSupporting evidenceRead Para 4-5 and answer the questions below.1)Water companies began to sell clean water.2)The threat of cholera around the world decreased.3)He helped peop

11、le know how to prevent cholera.4)Snow transformed the way scientists study diseases.2.What contributions did John Snow make?1.What caused the outbreak of cholera in London in 1854?Summarydraw a conclusionthink of a methodcollect dataask a questionfind a problemanalyze the resultsfind supporting evid

12、encethe stages of scientific research课堂小结课堂小结(2)In the early 19th century,1.a severe cholera hit Europe，John Snow became 2._(frustrate)because no one knew how to prevent or treat cholera.3.he never lost his desire to destroy cholera once and for all.Snow subscribed to the theory that cholera 4._ (ca

13、use)by an 5._(infect)from germs in food or water.Snow began by 6._ (mark)on a map the exact places where all those who died had lived.As 7._ result，John Snow was able to announce that the pump water 8.(carry)cholera germs.9.(according)，he had the handle of the pump 10._ (remove)so that it could not

14、be used.Through this intervention，the disease was stopped in its tracks.whenfrustratedButwas causedinfectionmarkingacarriedAccordinglyremoved当堂检测当堂检测(12)In the early 19th century,an outbreak of cholera hit Europe,_(cause)millions of deaths.seeing this,John Snow became frustrated because no one knew

15、how _(prevent)or treat cholera.At that time,doctors had two theories to explain how cholera spread.One was that bad air caused the disease and another was that cholera was caused by germs in food or water.John discovered that in two particular street _ cholera outbreak was so severe that over 500 pe

16、ople died in ten days.Through his serious _(investigate),he found it was the pump water in Broad Street _ resulted in the disease.Therefore,he had the handle of the pump _(remove).It _(turn)out that the water from the pump had been infected by waste.Through Snows _(tired)efforts,water companies bega

17、n to sell clean water,and the threat of cholera around the world saw a substantial decrease.Snow transformed the way scientists study diseases.For this reason,he is considered the father of modern epidemiology.causingto preventtheinvestigationthatremovedturned当堂检测当堂检测(15)tirelessWhat qualities do yo

18、u need to be a scientist?Qualitiespassion creativitydevotionselflessness hard workWas cholera defeated completely?Yes?No?As a doctor,he helped us to prevent cholera.As a scientist,he found out what caused cholera.Evaluation of John SnowA map of Broad Street-”Cholera Map”A map of Broad Street-”Choler

19、a 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.He suspected that the water from the pump was to blame.Finding EvidenceAnayse the resultsdra

20、w a conclusionBroad Street37403816209821Many deaths happened here.No death happened here.Public houseIt seemed that the water from the pump was to blame.Anayse the resultsThe pump water carried _.Many deaths occurred near the _ in Broad Street.Some households had no deaths.they worked in and had bee

21、n given ,so had not drunk .A woman and her daughter had died after _,because she had the water_ every day.Snow began by _ the places where people _.Snow had the handle of the pump _.marking on a map died had livedmoving away from Broad Streetdelivered to her housecholera germsremovedThink of a metho

22、dCollect data and analyse the resultsConclusionSolutionwater pumppubwater from the pumpfree beerFind supporting evidenceSkimming:Structure of the passagePara1PhenomenonPara2Para3Para4Para5two theoriesmake an investigationhow?find?other casesThey can be spread to other people.They have an unknown cause.They are difficult to cure.Characteristics of infectious diseases