【课件】Unit+1Reading+and+Thinking+课人教版（2019）选择性必修第二册.pptx

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1、Science and ScientistsReading and ThinkingTeaching GoalsEnabletheSstogettoknowsomeknowledgeaboutCholera.EnabletheSstounderstandthepassagewell.LettheSslearnsomereadingskillsbyscanningandskimming.Tolearnfromthegreatscientistsanddevelopthenoblespirits.学习目标学习目标(1)问题导学问题导学(2)1.WhowasJohnSnow?2.WhatisKing

2、Cholera?3.Whatdoes“defeat”mean?4.WhatdidJohnSnowdoaboutKingCholera?The secientists that we knowTo YouyouYuan LongpingEinsteinWho is he?HeplayedanimportantroleinfightingagainstCovid19andwontheMedalofRepublic(共和国勋章）共和国勋章）in2020.Zhong NanshanMany years ago,a terrible disease named cholera in the world

3、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.JohnSnowCholeraloss of liquid(缺水)severe vomiting(呕吐)diarrhea(腹泻)It begins in the stomach and a sev

4、ere case can lead to death without immediate treatment.01020304SARSAIDS05Bird FluCholeraCOVID-19infectious diseasesLookatthepicture,thetitleandthemap,guesswhatthecontentofthetextis.Thenskimitquicklytoseeifyouareright.PrereadingThetextismainlyabout_and_hedefeatedkingcholera.howJohnSnowJohn Snow Defea

5、ts“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 people.He used the map to prove the second theory was correct.He finally found out that dirty w

6、ater was the cause of cholera.Finally“kin Cholera”was defeated.Para 3 Readthepassagequicklyandgetthemainideaofeachparagraph.What?Its one of _ in the world,because it causes _.When?_Where?_What results?_the most feared diseasessevere diarrhoea,dehydration and even deathIn the early 19th centuryEurope

7、Millions of people died from the diseaseCholeraTask2.Readthe1stparagraphquicklyandfillinthemindmap.Task 1:Find the problem Two theories The first theorybad air caused the diseaseCholera was caused by an infection from the germs in food or water.Proofwasneed.The second theory Read the 2nd paragraph c

8、arefully and find out the two theories.Task 2:Ask a questionCarefulreadingReadPara2and3againtocompletethechart.Itwasbelievedthatcholerawascausedby_orgermsin_.Thepumpwatercarried _.Manydeathsoccurrednearthe_inBroadStreet.Somepeoplewholivednearthepumpworkedinthepuband_drunkthewaterfromthepump,andlived

9、.AwomanandherdaughterdiedinanotherpartofLondonafter_Snow_theplaceswherepeoplewho_hadlived.Snowhadthe_ofthepumpremoved.ABCDEbadairfoodorwatermarkedonamapdiedwaterpumphadnotdrinkingwaterfromthepumpcholeragermshandleSupportingevidenceBroad StreetMany deaths happened here.No death happened here.The wate

10、r from the pump was to blame.Read Para 4-5 and answer the questions below.The Father of Modern EpidemiologyWater companies sold water from the River Thames that was polluted by Water companies sold water from the River Thames that was polluted by raw waste,causing people who drank this water to get

11、malaria.raw waste,causing people who drank this water to get malaria.1)Water companies began to sell clean water.2)The threat of cholera around the world decreased.3)He helped people know how to prevent cholera.4)Snow transformed the way scientists study diseases.2.What contributions did John Snow m

12、ake?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 evidencethe stages of scientific research课堂小结课堂小结(2)Intheearly19thcentury,1.aseverecholerahitEurope，JohnSnowbecame2._(frustr

13、ate)becausenooneknewhowtopreventortreatcholera.3.heneverlosthisdesiretodestroycholeraonceandforall.Snowsubscribedtothetheorythatcholera4._(cause)byan5._(infect)fromgermsinfoodorwater.Snowbeganby6._(mark)onamaptheexactplaceswhereallthosewhodiedhadlived.As7._result，JohnSnowwasabletoannouncethatthepump

14、water8.(carry)choleragerms.9.(according)，hehadthehandleofthepump10._(remove)sothatitcouldnotbeused.Throughthisintervention，thediseasewasstoppedinitstracks.whenfrustratedButwascausedinfectionmarkingacarriedAccordinglyremoved当堂检测当堂检测(12)After ReadingAfter Reading1.Fill in the blanks according to the t

15、ext.Fill in the blanks according to the text.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 how _(prevent)or treat cholera.At that time,doctors had two theories to explain how cholera spread.One was t

16、hat 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 people died in ten days.Through his serious _(investigate),he found it was the pump water in Broad Street _ re

17、sulted 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 began to sell clean water,and the threat of cholera around the world saw a substantial decrease.Snow transformed

18、 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 you need to be a scientist?Qualitiespassion creativitydevotionselflessness hard workWas cholera defeated compl

19、etely?Yes?No?How to prevent the cholera?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 A map of Broad Street-”Cholera Map”Map”ReadPara3carefully.What method did Snow use?1.Whichhouseshadmorethan4deaths

20、andwhichhadnodeathinBroadStreet?2.WhatdidSnowconclude?Multipledeathshappenedhere.Nodeathhappenedhere.Hesuspectedthatthewaterfromthepumpwas to blame.FindingEvidenceAnaysetheresultsdraw a conclusionBroad Street37403816209821Many deaths happened here.No death happened here.Public houseIt seemed that th

21、e water from the pump was to blame.AnaysetheresultsThe pump water carried _.Many deaths occurred near the _ in Broad Street.Some households had no deaths.they worked in and had been given ,so had not drunk .A woman and her daughter had died after _,because she had the water_ every day.Snow began by

22、_ 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 germsremovedThinkofamethodCollectdataandanalysetheresultsConclusionSolutionwater pumppubwater from the pumpfree beerFindsupportingevidenceSkimming:S

23、tructure of the passagePara1FindaproblemPhenomenonPara2Para3Para4Para5MakeaquestionThinkofamethodCollectdataAnalysetheresultsFindsupportingevidenceDrawaconclusiontwotheoriesmakeaninvestigationhow?find?othercasesSolutionsandsignificanceThey can be spread to other people.They have an unknown cause.They are difficult to cure.Characteristics of infectious diseases