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Unit1 Great Scientists2020/10/281What do you know about great scientists?Warming up2020/10/282精品资料2020/10/2831.Which scientist discovered that objects in water are lifted up by a force that helps them float?2020/10/284Its.Archimedes“Give me a place to stand on,and I can move the earth.”2020/10/2852.Who wrote a book explaining how animals and plants developed as the environment changed?2020/10/286Its.Charles Darwin2020/10/2873.Who used peas to show how physical characteristics are passed from parents to their children.2020/10/288ItsGregor Mendel2020/10/2894.Who discovered radium?2020/10/2810ItsMarie Curie2020/10/28115.Who invented the way of giving electricity to everybody in large cities?2020/10/2812ItsThomas EdisonGenius is one percent inspiration and ninety-nine percent perspiration.2020/10/28136.Who was the painter that studied dead bodies to improve his painting of people?2020/10/2814ItsLeonardo da Vinci 2020/10/28157.Who invented the earliest instrument to tell people where earthquakes happened?2020/10/2816ItsZhang HengSeismographSeismograph地震仪地震仪2020/10/28178.Who put forward a theory about black holes?Black hole 2020/10/2818ItsStephen Hawking (1942-)2020/10/28199.9.Who invented the first steam engine?2020/10/2820ItsItsThomas Newcomen2020/10/282110.10.Who invented a lamp to keep miners safe underground?2020/10/2822ItsItsSir Humphry Davythe Safety Lamp 2020/10/2823draw a conclusionthink of a methodcollect resultsmake a questionfind a problemanalyse the resultsfind supporting evidencefind a problemmake a questionthink of a methodcollect resultsanalyse the resultsdraw a conclusionHow to prove a new idea in scientific research?find supporting evidence2020/10/28252020/10/2826Do you know John Snow?Do you know John Snow?Do you know what kind of disease is Do you know what kind of disease is cholera?cholera?John Snow is a well-known doctor in the 19th century in London and he defeated“King Cholera”.It is a kind of infectious disease caused by drinking dirty water and it caused a lot of deaths in the old times and it was very difficult to defeat.John Snow 约翰约翰.斯诺斯诺(1813 1858),英国麻醉学家、流行病专家。英国麻醉学家、流行病专家。他首次提出了预防霍乱的措施。他首次提出了预防霍乱的措施。1854年年,伦敦霍乱流行伦敦霍乱流行,斯诺通过斯诺通过研究霍乱病死者的日常生活情况研究霍乱病死者的日常生活情况,寻找到他们的共同行为模式寻找到他们的共同行为模式,发现发现了霍乱与饮用不洁水的关系了霍乱与饮用不洁水的关系,由于由于及时切断了二者的联系及时切断了二者的联系,有效制止有效制止了霍乱的流行。了霍乱的流行。Infectious diseases can be spread to other people.They have an unknown cause and need public health care to solve them.People may be exposed to infectious diseases,so may animals.Bird flu,AIDS and SARS are infectious diseases.Infectious diseases are difficult to cure.2020/10/2828()John Snow began to test two theories.()An outbreak of cholera hit London in 1854.()John Snow marked the deaths on a map.()He announced that the water carried the disease.()John Snow investigated two streets where the outbreak was very severe.()King Cholera was defeated.()He found that most of the deaths were near a water pump.()He had the handle removed from the water pump.Read the passage and number these events in the order that they happened.Fastreading:214738562020/10/2832What is the problem?The cholera was the most deadly disease of its day.Neither its cause,nor its cure was understood.What caused cholera?Para.1Careful reading:2020/10/2833Make a question:Which theory to believe in?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.Which one do you believe more?What about John Snow?2020/10/2834A map of Broad StreetWhat method did he use?Broad StreetMany deaths happened here.No death happened here.It seemed the water from the pump was to blame.What did he do next?Public houseParas.3-42020/10/2835 Analyze the results:What happened to the pump water?The water was from the river which had been polluted by the dirty water from London.2020/10/2836Find supporting evidence:what extra evidence did he find?A woman and her daughter who lived far away but drank the water also died.2020/10/2837Draw a conclusionThe polluted water carried the disease.2020/10/2838John 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.doctor19thcausedefeatbroke2020/10/2840He _ 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.markedpumpsourceexamineddealing2020/10/2841Learn more about cholera2020/10/2842What should we pay attention to in our daily life in order not to get infected with cholera?Heat the food left overnightCook raw food thoroughlyWash hands oftenKeep away from flieschoose fresh sea foodKeep the kitchen cleanDispose rubbish properly.Drink boiled waterDiscussion2020/10/28432020/10/2844Four outbreaks of cholera in the 1830s and 1840s killed many people in England.In 1854,“the most terrible outbreak of cholera which ever occurred in the kingdom”began.It was so violent and sudden that 127 people died in the first three days.The terrible cholera2020/10/2845
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