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. coronavirus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 Deficiency Syndrome (简
2、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?戴手套Seven cholera pandemics (霍乱大流行霍乱大流行) have occurred in the past 200 years. Lets take the third cholera pandemic (18521860) as an example to see its “power”.Place Deaths R
3、ussiaone million1858-1860Tokyo, Japan100,000 200,0001854Chicago3,50018531854London10,73918541855Spainover 236,000Mexico200,000Because of some scientists great efforts, now the cholera is not as serious as that time. Pre-reading_ analyze the results _ ask a question_ draw a conclusion _ collect data
4、_ find a problem _ find supporting evidence_ think of a methodDiscuss the following stages of scientific research in groups. What order would you put them in?5274163ReadingRead the whole text quickly and match the main ideas.the second Its one of _ in the world, because it causes _._(when), an outbr
5、eak of cholera hit _ milions of people _.He rose to become _ , and even _ Queen Victoria when she gave birth.John Snow became _ because no one knew _.However, he had a desire to _ once and for all. the most feared diseasessevere diarrhoea and dehydrationIn the early 19th centuryEuropedied from the d
6、iseasefrustratedhow to prevent or treat choleraa famous doctorattended to destroy cholera While Readingcareful reading Read Para 1 carefully and fill in the mind mapcontradictoryTheory one: _coughsneezerunny nose(流鼻流鼻涕）涕）lungdiarrhoeadehydration para 2caused by bad air Read Para.2 carefully and get
7、to know the two theories.Theory two: _caused by germs A map of Broad Street-”Cholera A map of Broad Street-”Cholera Map”Map”What method did Snow use?1) Which houses had more than 4 deaths in Broad Street?2) Which houses had no death in Broad Street?Multiple deaths happened here.No death happened her
8、e.He suspected that the water from the pump was to blame. EvidenceRead Para.3 carefully and answer questions. ？These families had not drunk the water from the Broad Street pump. ？It seemed that the woman liked the water so much that she had it delivered to the house every day.He was able to announce
9、 that the pump water carried cholera germs.He had the handle of the pump removed.A: It was believed that 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 liv
10、ed.A woman and her daughter died in another part of London after _.D: The pump water carried _.Match the following headers with the letters from the chart above. Write A-E in the blanks.handleconclusionevidenceprocesssolutiontheoriesRead para 2-3 again and complete the chart below.E: The _ of the pu
11、mp was removed.airfood or watermarked ondiedwater pumphadntdrinking water from the pumpcholera germs1) 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
12、. What contributions did John Snow make?1. What caused the outbreak of cholera in London in 1854?Read Para.4 and 5 carefully and answer the questions.Was cholera defeated completely? No To prevent cholera from spreading, wed better drink pure or boiled water and eat clean food.discovered artemisnin
13、to treat malaria,was awarded the Nobel Prizethe father of hybrid rice, rid the world of hungerDespite the danger of infection, devoted to the research of COVID-19What qualities and scientific spirits do they have in common?the Father of Modern Epidemiology, defeated King CholeraSummary John Snow was
14、 a well-know in London in the century. He wanted to find of cholera in order to help people it. In 1854 when a cholera London, he began to gather information. He on a map all the dead people lived and he found that many people who had the dirty water from the died. So he decided that the polluted wa
15、ter carried cholera. He suggested that the of all water supplies should be _ and new methods with water be found. Eventually, through his efforts, “king cholera” was . doctor/physician cause infected hit marked 19th water pump handlewhere polluted removed tireless /intense defeatedIn 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.Thanks for your attention.
