1、What do you know about great scientists?Try the quiz.Warming up1.Which scientist discovered that objects in water are lifted up by a force that helps them float?Archimedesan ancient Greek mathematician&physicist2.Who wrote a book explaining how animals and plants developed as the environment changed
2、?Charles Darwin British author of The Origin of Species 3.Who invented the first steam engine?Thomas NewcomenBritish,improved the first steam pump and turned it into a steam engine for taking water out of mines in 1712.James Watt improved it and turned it into the first modern steam engine used on t
3、he railways.4.Who used peas to show how physical characteristics are passed from parents to their children?Gregor Mendel Czech(捷克人)5.Who discovered radium?Marie Curie Polish and French,won two Nobel PrizeszX.x.K6.Who invented the way of giving electricity to everybody in large cities?Thomas Edison a
4、n American inventor7.Who was the painter that studied dead bodies to improve his painting of people?Leonardo da Vinci Italian artist8.Who invented a lamp to keep miners safe underground?Sir Humphry DavyBritishMiniature Miners Safety Lamp 9.Who invented the earliest instrument to tell people where ea
5、rthquakes happened?Zhang HengChinese,invented seismograph10.Who put forward a theory about black holes?Stephen Hawking a British astronomerzX.x.KWhat are the basic qualities of the great scientists as above?Discussionintelligent,modest,wise,unselfish,determined,hard-working,confident,persistent,brav
6、e etc.1.Find a problem:(发现问题)2.Make up a question:(形成研究主题)3.Think of a method:(找出研究方法)4.Collect results:(收集材料)5.Analyse results:(分析材料)6.Repeat if necessary:(必要时重新分析)7.Draw a conclusion:(得出结论)Homework:Read the words and preview the reading.1.Do you know about SARS?It is a kind of terrible infectious
7、disease caused by drinking dirty water and it caused a lot of deaths in the old times and it was very difficult to defeat.It is a kind of terrible infectious disease,which killed many people.2.Do you know about cholera?But John Snow,a well-known doctor in the 19th century in London,defeated“King Cho
8、lera”.John Snow Defeats“King Cholera”Lets get to know how Dr.John Snow defeated“King Cholera”in:John Snow(1813-1854)“For his persistent efforts to determine how cholera was spread and for the statistical mapping methods he initiated,John Snow is widely considered to be the father of epidemiology(流行病
9、学).John Snow Defeats“King Cholera”Why couldnt cholera be controlled at first?A.Its cause was not understoodB.Its cure was not understoodC.Neither its cause nor its cure was understoodFirst Reading(in 10 minutes):(in 10 minutes):Write down the main idea of each paragraphPara 1:Para 2:Para 3:Para 4:Jo
10、hn Snow was a famous doctor in London and he was kind enough to help the ordinary people with cholera.John Snow was interested in two theories about cholera.John Snow collected information to test the two theories.The map showed that the polluted water might be the reason for cholera.Para 5:Para 6:P
11、ara 7:The reason for cholera was that the source of the water（水源）was polluted.John Snow was sure enough that polluted water carried the disease of cholera.John Snow suggested how to prevent cholera from happening again.John Snow Defeats“King Cholera”John Snow Defeats“King Cholera”The passage is writ
12、ten as a report of an The passage is written as a report of an experiment and there are experiment and there are 7 steps7 steps:1.Find a problem:1.Find a problem:2.Make up a question:2.Make up a question:3.Think of a method:3.Think of a method:4.Collect results4.Collect results:5.Analyse results:5.A
13、nalyse results:6.Repeat if necessary:6.Repeat if necessary:7.Draw a conclusion:7.Draw a conclusion:Steps:What/How?1.Find a problem2.Make up a question3.Think of a method4.collect resultsJohn Snow Defeats“King Cholera”What causes cholera?Which theory is correct?Collect information on those who were i
14、ll or died and where they got their waterMark information on a map to find out where people died or did not die6.Repeat if necessary7.Make a conclusion5.Analyse resultsAnalyse the water to see if that is the cause of the illnessFind other evidence to make sure the conclusionThe water is to blame.The source of all drinking water should be examined.
