必修5Unit5-Great-Scientists公开课优质课件.pptx

1、Unit 1 Great scientists ReadingMany deaths in African countries in 2005 and even nowIt is a kind of terrible disease caused by drinking dirty water or food,and it caused a lot of deaths in the old times and it was very difficult to defeat.Fast readingWhats the main idea of the passage?A.John Snow wa

2、s 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,analyzed data and found the cause of the disease and solved it.Careful reading1.Who was John Snow?2.What made John Snow inspired?3.What would happ

3、en every time cholera broke out?He was a famous doctor in Londonso expert,indeed,that he attended Queen Victoria as her personal physician.He became inspired when he thought about helping ordina-ry people exposed to cholera.Many thousands of terrified people died.John Snow Doctor，expertInspired,help

4、,people,exposed to“King cholera”Deadly diseaseCause&cureunderstoodPeople diedChallenge OutbreakPara.1 Find out What caused cholera?Find a problem:What caused cholera?Careful readingHow many theories about cholera were there?Two fromstomachPara.2 Cholera multipliedgasfloatfound victimsabsorbbodiesint

5、odiseasediseasebodypeoplediedMake a question:Which theory to believe?1.Which theory did John Snow think was correct?2.What did he do to collect evidence?Careful readingJohn Snow suspected that the second theory was correct but he needed evidence.He gathered information.Para.3Theory（）Need evidenceOut

6、break hitLondon In 1854BeganenquiryGather informationAs disease spreadIn the two streets,Outbreak,so severe,More than 500,diedDetermined to find out why Think of a method1.How did he get a valuable clue about the cause of the disease?2.What did he notice and discover?3.What was to blame for the chol

7、era?Careful readingFirst he marked on a map the exacted places where all the dead people have lived,and this gave him a valuable clue about the cause of the disease.You can get the answer from sentences 2,3,5,6.It seemed that the water was to blame.A map of Broad StreetWhat method did he use?Broad S

8、treetMany deaths happened here.No death happened here.The water from the pump was to blame.Public housePara.4Marked on a map the place where the dead livedGaveclueThe deathsnearwater pump(in Broad Street)Houses(no deaths)workedpubgivenFree beerWater was to blame.Collect results 1.Why did he tell peo

9、ple to remove the handle from the pump?2.What happened after the handle was removed?Careful readingBecause he found that the water came from the river polluted by the dirty water from London.The disease slowed efromPara.5look intoThe sourcethe polluted rivertold people Remove handle usediseaseSlowed

10、 downshow:Cholera was spreadgermsgas Analyze the results1.What supporting evidence did he find?2.What did he do next with the exact evidence?3.What measures did John Snow take to prevent the disease from spreading?Careful readingHe found supporting evidence from two other deaths that were linked to

11、the Broad Street outbreak.With the exact evidence he was able to announce with certainty that polluted water carried the virus.He suggested that the source of all the water supplies be examined.The water companies were instructed not to expose people to polluted water any more.Away B.S.Para.6Found s

12、upporting evidence:Two other deathswere linked to B.S.outbreakAnnounced(with certainty):polluted rivercarriedthe virusA woman like,had water deliveredAfter drinking She&daughterdiedIn another part of London Find supporting evidence instructedPara.7suggestTo prevent this happening againThe source of

13、water suppliesBe examinedWater companiesExpose people to polluted waterJohn Snow Defeated“King Cholera”Draw a conclusion What should we pay attention to in our daily life in order not to get infected with cholera?Drink boiled waterWhat should we pay attention to in our daily life in order not to get

14、 infected with cholera?Wash hands oftenKeep away from fliesChoose fresh sea foodKeep the kitchen cleanCook raw food thoroughlyDispose rubbish properly.1.Find a problem:(发现问题发现问题)2.Make up a question:(形成研究主题形成研究主题)3.Think of a method:(找出研究方法找出研究方法)4.Collect results:(收集材料收集材料)5.Analyse results:(分析材料分析

15、材料)6.Find supporting evidence:(寻找支持性证据寻找支持性证据)7.Draw a conclusion:(得出结论得出结论)Fill in the blanks:John Snow was a well-known in London in the _ century.He wanted to find the _ of cholera in order to _ it.In 1854 when a cholera out,he began to gather information.He on a map where all the dead people had

16、 lived and he found that many people who had drunk the dirty water from the _ died.So he decided that the polluted water carried cholera.He suggested that the _ of all water supply be and new methods of _ with polluted water be found.Finally,“King Cholera”was defeated.doctor19thcausedefeatbrokemarke

17、dpumpsourceexamineddealing(in 5 minutes)1.Surf the internet to find out:What should we pay attention to in our daily life to prevent ourselves from getting infected with all these infectious diseases?2.Write down the important words and phrases in your exercise books.3.Underline the difficult sentences that you cannot understand in the passage.Thank You!