1、Unit 1Great scientistscharacteristicradium painter scientificconclude conclusion analysen.特征;特性n.镭n.画家;油漆匠adj.科学的vt.&vi.结束；推断出n.结论；结束vt.分析Words previewput forward draw a conclusion提出得出结论Expressions previewWarming UpWhat do you know about great scientists?Try this quiz and find out who knows the most
2、.1.Which scientists discovered that objects in water are lifted up by a force that helps them float?Archimedes2.Who wrote a book explaining how animals and plants developed as the environment changed?Charles Darwin3.Who invented the first advanced steam engine?Thomas Newcomen4.Who used peas to show
3、how physical characteristics are passed from parents to their children?Gregor Mendel5.Who discovered radium?Marie Curie6.Who invented the way of giving electricity to everybody in large cities?Thomas Edison7.Who was the painter that studied dead bodies to improve his painting of people?Leonardo da V
4、inci8.Who invented a lamp to keep miners safe underground?Sir Humphry Davy9.Who invented the earliest instrument to tell people where earthquakes happened?Zhang Heng10.Who put forward a theory about black holes?Stephen HawkingDo you know how to prove a new idea in scientific research?Draw a conclusi
5、on think of a method Collect results make a questionFind a problem analyse the resultsFind supporting evidence What order would you put them in?draw a conclusionthink of a methodcollect resultsmake a questionfind a problemanalyse the resultsfind supporting evidencefind a problemmake a questionthink
6、of a methodcollect resultsanalyse the resultsdraw a conclusionHow to prove a new idea in scientific research?find supporting evidenceJohn Snow defeats“King cholera”According to the passage.please put the 7 stages in right orderdraw a conclusionthink of a methodcollect resultsMake a questionfind a pr
7、oblemanalyse the resultsfind supporting evidenceFast-readingdraw a conclusionfind a problemmake a questionthink of a methodcollect resultsanalyse the resultsfind supporting evidenceMatch themPara 1Para 2Para 3Para 4Para 5Para 6Para 7Prevention of CholeraJohn snow was a famous _,so _ that he _ Queen
8、Victoria as her personal_.But he thought about helping ordinary people _cholera.He wanted to face the _and _ this problem.Paragraph 1:doctorexpertattendedphysicianexposed tochallengesolveFind a problemWhatre the two theories?Paragraph 2:Make a question1:Cholera multiplied in the air.2:People absorbe
9、d this disease into their body with their meals.Paragraph 3:Think a method When another outbreak hit London in 1854,what did he do?begin his enquiry gather information determine to find out whyBroad StreetMany deaths happened here.No death happened here.Public houseParagraph 4:Collect resultsFirst h
10、e _ _ a map to find that many of the deaths were near the _ _in broad street,but some houses had_ _.So he made further _.He _that those people had not drunk the water from the pump.It seems that the water was to _.marked onwater pumpno deathsinvestigationsdiscoveredblameParagraph 5:Analyse resultsWh
11、at did John snow do next?Looked into the source of the water;Found that it came from the river polluted by the dirty water.Told to remove the handle from the pump.The disease slowed down.Paragraph 6:What extra evidence did he find?Finding supporting evidenceA woman and her daughter who moved away bu
12、t drank the water also died.Paragraph 7:Draw a conclusionIt was certain that polluted water carried the virus.The source of all the water supplies should be examined.Retelling 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 _ i
13、t.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 _cholera.He suggested that the _ of all water supplies be _.The water comp
14、anies were_ not to expose people to polluted water any more.Finally,“King Cholera”was_.doctor19thcausedefeatbrokemarkedpumpsourceexaminedcarriedinstructeddefeatedNumber these events in the time order._ John Snow began to test two theories._ An outbreak of cholera hit London in 1854._ John Snow marke
15、d 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.21345678Summary John S
16、now wanted to find the cause of cholera.He believed that people become ill after eating infected food.He used the next outbreak of cholera to test his idea.He studied a small area of houses which got theirWater from the same pump.Many people in the area died.John Snow showed that this was because the water in the pump was infected.He showed that cholera could be defeated if people drank clean water.
