人教版必修5第一单元.ppt

,Unit 1 Great Scientists,Lets have a competition!,Do you know other scientists?,The following is a quiz and lets find out who knows the most.,1.Which scientist discovered that objects in water are lifted up by a force that helps them float?,B.Archimedes,C.Thomas Edison,A.Charles Darwin,2.Who wrote a book explaining how animals and plants developed as the environment changed?,A.Marie Curie,C.Charles Darwin,B.Gregor Mendel,3.Who invent the first steam engine?,A.Thomas Newcomen,C.Thomas Edison,B.Archimedes,4.Who used peas to show how physical characteristics are passed from parents to their children.,A.Thomas Edison,C.Archimedes,B.Gregor Mendel格里哥孟德尔（奥地利遗传学家,5.Who discovered radium?,A.Marie Curie,C.Newton,B.Zhang Heng,(1867-1934)(Polish and French,won two Nobel Prizes),6.Who invented the way of giving electricity to everybody in large cities?,A.Stephen Hawking,C.Thomas Edison,B.Archimedes,(1847-1931)an American inventor,7.Who was the painter that studied dead bodies to improve his painting of people?,A.Gregor Mendel,C.Marie Curie,B.Leonardo da Vinci莱昂纳多达芬奇,(1452-1519)Italian artist,8.Who invented a lamp to keep miners safe underground?,Sir Humphry Davy,C.Faraday,B.Thomas Newcomen,(1778-1829)British,英国化学家煤矿安全灯发明者汉弗莱戴维爵士,Thomas Edison,The Inventions of Thomas Edison,Phonographfunr:f 留声机,Lightbulb,Motion Pictures电影,9.Who invented the earliest instrument to tell people where earthquakes happened?,A.Charles Darwin,C.Watt,B.Zhang Heng,(78-139)Chinese,invented seismograph,10.Who put forward a theory about black holes?,Stephen Hawking史蒂芬霍金（英国著名物理学家）,C.Copernicus,B.Archimedes,(1942-)a British astronomer,6.Do you know who defeated“King Cholera”?,John SnowBritish(1813 1858),John Snow is a well-known doctor in the 19th century in London and he defeated“King Cholera”.,Do you know what kind of disease is cholera?,It is a kind of terrible disease caused by drinking dirty water and it caused a lot of deaths in the old times and it was very difficult to defeat.b)It begins in the stomach and a severe case can lead to death without immediate treatment.c)And the victims died very quickly from a loss of liquid after severe vomiting(呕吐)and diarrhea(腹泻).,What other infectious diseases do you know?,For example:When you eat some seafood,You feel,Maybe you have got _.,Cholera,Do you know how to prove a new ideain scientific research?,seven stages,发现问题提出假设思考方法收集资料分析结果寻找证据得出结论,THINK,WORK,FIND,Do scientific research,(The process),Find a problemMake a questionThink of a methodCollect results Analyse the resultsFind supporting evidenceDraw a conclusion,SOLVE,Lets get to know how Dr.John Snow defeated“King Cholera”in 1854 in London in this reading passage:,John Snow Defeats“King Cholera”,Task 1:Skim and Scan,Who defeats“King Cholera“?What happened in 1854?How many people died in 10 days?Why is there no death at No.20 and 21 Broad Street as well as at No.8 and 9 Cambridge Street?,John Snow,Cholera outbreak hit London.,500,These families had not drunk the water from the Broad Street pump.,Task 2,detailed reading,Read and answer:Para.1,John Snow was an doctor in London who Queen Victoria as her personal.He thought about helping ordinary people to cholera.Though the cause and the of it were unknown,he wanted to face the and solve the problem.,expert,attended,physician,exposed,cure,challenge,Paragraph 2 make up a question:Which theory to believe in?,idea 1,idea 2,Cholera multiplied in the air without reason.A cloud of dangerous gas would float around until it found its victims.,People absorbed it with their meals.,John Snow finally proved the theory he believed by _.A.gathering information with the help of a map B.looking into the source of the water for Broad Street and Cambridge Street C.separating those who suffered cholera from those who didnt D.both A and B E.both A and C,Paragraph 3&4,Paragraph 3&4,What did he do with the results of his enquiry?What valuable clue did he get about the cause of the disease?What might be the cause?,Marked on a map,Many of the deathshad no deaths.,It seemed that the water was to blame for cholera.,A map of Broad Street,What method did he use?,Broad Street,Many deaths happened here.,No death happened here.,The water from the pump was to blame.,Public house,Paragraph 5,Why did he tell people to remove the handle from the pump?John Snow found that the source of the water came from the river polluted by the dirty water from London.He immediately told the astonished people in Broad Street to remove the handle from the pump so that it could not be used.What happened after the handle was removed?Soon afterwards the disease slowed down.,So that,slowed down,Paragraph 6,What s the extra evidence?,Two other deaths in another part of London that were linked to the Broad Street outbreak.,Paragraph 7,What are John Snows suggestions?,The source of all water supplies should be examined.New methods of dealing with polluted water should be found.The water companies were also instructed not to expose people to polluted water anymore.,Whats the main idea of the passage?John Snow was a well-known doctor in London.The cause of Cholera was polluted water.The source of all drinking water should be examined.How did John Snow collect,analyze data and find the cause of the disease and solved it.,Do you know what was this map used for in 1854?,Finding out the cause of Cholera.,Task 3,Mind Map of the text,John Snow Defeats“King Cholera”,Read the passage and fill in this form:(in 15 minutes),John Snow Defeats“King Cholera”,What causes cholera?,Which theory is correct?,Collect information on those who were ill or died and where they got their water,Mark information on a map to find out where people died or did not died,Analyze the water to see if that is the cause of the illness,Find other evidence to make sure the conclusion,The water is to blame.The source of all drinking water should be examined.,Read the passage again and 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 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.,doctor,19th,cause,defeat,broke,marked,pump,source,examined,dealing,(in 5 minutes),Homework,What should we pay attention to in our daily life to prevent ourselves from getting infected with all these infectious diseases?,Discussion,.Eat cooked food while it is still hot.,.Boil water thoroughly(完全)before drinking.,.Wash hands with soap and water before preparing food and eating.,.Avoid eating raw food,especially seafood.,