1、选择性必修二选择性必修二UNIT 1 SCIENCE AND SCIENTISTSJohn snow defeats“king cholera”The changes covid-19 has brought to us in the past two years.coronavirusWhat common infectious diseases do you know?天花：Small pox西班牙流感：Spanish influenza黑死病：Black death疟疾：Malaria 瘟疫：Plague肺结核：Pulmonary tuberculosis（简称TB）霍乱：Cholera
2、艾滋病：Acquired Immune Deficiency Syndrome(简称AIDS)黄热病：Yellow fever非典：Severe Acute Respiratory Syndromes(简称SARS)埃博拉病毒：Ebola virusWhat common infectious disease do you know?天花：Small pox西班牙流感：Spanish influenza黑死病：Black death疟疾：Malaria 瘟疫：Plague肺结核：Pulmonary tuberculosis（简称TB）霍乱：Cholera艾滋病：Acquired Immune
3、Deficiency Syndrome(简称AIDS)黄热病：Yellow fever非典：Severe Acute Respiratory Syndromes(简称SARS)埃博拉病毒：Ebola virusWhat common infectious disease do you know?01020304SARSAIDS05Bird FluCholeraCOVID-19infectious diseasesThey can be spread to other people.They have an unknown cause.They are difficult to cure.Cha
4、racteristics of infectious diseasesCholeraloss of liquid(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.戴手套Many years ago,a terrible disease named cholera in the world killed millions of people.People were very afraid of it,
5、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 What will be talked about from the title?John Snow Defeats“King Cholera”Who?How?What?What does“King”imply in the title?A.The name of cholera B.T
6、he causes of cholera C.Cholera spread fast D.Cholera is powerful and hard to cureJohn Snow Defeats“King Cholera”While reading-Fast readingthe second Who is John Snow?John Snow defeats“king cholera”How did he defeat cholera?What difficulties did he encounter?What is cholera?What are its cause,symptom
7、s and its treatment?Cholera used to be one of the most feared diseases in the world,until a British doctor.John Snow,showed how it could be overcome.This illness causes severe diarrhoea,dehydration,and even death.In the early19th century,when an outbreak of cholera hit Europe,millions of people died
8、 from the disease.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.However,he never lost his desire to destroy cholera once and for all.John Snow:John Sn
9、ow defeats“king cholera”cholera:cause:symptoms:treatment:Cholera used to be one of the most feared diseases in the world,until a British doctor.John Snow,showed how it could be overcome.This illness causes severe diarrhoea,dehydration,and even death.In the early19th century,when an outbreak of chole
10、ra hit Europe,millions of people died from the disease.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.However,he never lost his desire to destroy chole
11、ra once and for all.a young and famous doctor,and even attended to Queen Victoriabe one of the most feared diseases/millions of people died from itIt remained to be discovered.severe diarrhoea,dehydration严重腹泻，脱水It remained to be discovered.Who is John Snow?John Snow defeats“king cholera”How did he d
12、efeat cholera?Based on the title,the pictures and the first paragraph,what do you think the text probably talks about?The text is probably how John Snow defeats cholera.And the map probably play an key role in the process.What is cholera?What are its cause,symptoms and its treatment?Why is“defeats”u
13、sed instead of defeated?What does“king”mean here?John Snow defeats“king cholera”Why is“defeats”used instead of defeated?What does“king”mean here?Simple tense is often employed in news report to indicate that the event either was still ongoing or just had happened.“King”is used to show the severity o
14、f cholera.Thus it can also reveal the great contributions of Snow made.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 centuryEuropeMillions of people died from the diseaseCholeraTask2.R
15、ead the 1st paragraph quickly and fill in the mind map.Task 1:Find the problem Two theories The first theory bad air caused the diseaseCholera was caused byan 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.Tas
16、k 2:Ask a questionThe 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 _ the places where people _.Snow
17、had the handle of the pump _.marking on a map died had livedmoving away from Broad Streetdelivered to her housecholera germsremovedThink of a methodCollect data and analyse the resultsConclusionSolutionwater pumppubwater from the pumpfree beerFind supporting evidenceBroad Street37403816209821Many de
18、aths happened here.No death happened here.Public houseIt seemed that the water from the pump was to blame.Anayse the resultsSTAGES IN SCIENTIFIC RESEARCH Draw a conclusion Collect data Ask a question Find a problem Analyse the results Find supporting evidence Think of a method A:It was believed that
19、 cholera was caused by bad _ or germs in _.B:Snow_the places where the people who _ had lived C:Many deaths occurred near the _ in Broad Street.Some people _ drunk the water from the pump,and lived.A woman and her daughter died in another part of London after _.D:The pump water carried _.Match the f
20、ollowing headers with the letters from the chart above.Write A-E in the blanks.handleconclusionevidenceprocesssolutiontheoriesRead the passage again and complete the chart below.E:The _ of the pump was removed.airfood or watermarked ondiedwater pumphadntdrinking water from the pumpcholera germs1.Q:W
21、hat _?A:Snow thought that cholera was caused by germs in food or water.2.Q:Why _ _?A:Snow had the handle from the pump removed so that it could not be used.3.Q:How _?A:The cholera threat was defeated thanks to the work of John Snow.did Snow think cholera was caused did Snow have the handle from the
22、pump removedwas the cholera threat defeatedAsk questionsOne way to approach a reading passage is to ask questions about it.Asking questions can help you understand the content.It can also help you think more deeply about the topic.What questions would you ask to get the following answers?While readi
23、ngStagesKey words or sentences1.two contradictory theories2.in two particular street the cholera was so severe.find out why3.marking on the map4.houses number 16,37,38 and 40;20 and 21;8 and 95.multiple death near the water pump;some houses had no death.6.a woman and her daughter had died,the woman
24、liked the water.had it delivered to her house7.John Snow announced that the pump water carried cholera germs.As a doctor,he helped us to prevent cholera.As a scientist,he found out what caused cholera.Evaluation of John SnowWhat qualities do you need to be a scientist?Qualitiespassion creativitydevo
25、tionselflessness hard workIn order not to get infected with disease,what should we pay attention to in our daily life.Drink boiled water.Remember to wear a mask when going out.Heat the food left overnightWash your hands often.Cook raw food thoroughly.Deal with rubbish timely and properly.戴手套Thank for your attention.
