1、高二必修5Unit 1 Great ScientistsReadingDo you know how to prove a new idea in scientific research?Discuss in small groups the stages in setting out a new scientific idea.情景导入情景导入学习目标学习目标1.通读文章，概括段意，总结大意。2.掌握Scanning 和Skimming阅读技巧。3.根据文章回答问题。学习101名师微课，及阅读Reading部分文章，了解大意。课前自主学习课前自主学习What do you know abou
2、t infectious diseases?What do you know about cholera?自主学习反馈自主学习反馈GermanyGreat BritainDeath of first cholera case in London during the 1848-49 epidemic LondonPrevious cholera epidemic in Great Britain in 1831-32The spread of cholera自主学习反馈自主学习反馈Look at the picture,the map and the title and predict the
3、 content of the reading passage.Then skim it quickly to see if you are right.自主学习反馈自主学习反馈John Snow新课讲解新课讲解Read the text(P2-3)quickly and complete the main idea of it.The text is mainly about _ and how he _.Johndefeated choleraSnow新课讲解新课讲解I.To prove a new scientific idea,seven stages are needed.Read
4、the text(P2-3)carefully and fill in the blanks.新课讲解新课讲解Stage 1Find a problemA large number of people died of cholera,but neither its 1._ nor its 2._ was understood.Stage 2Make a question Theory one:Cholera 3._ in the air and floated around until it found its victims.Theory two:When people 4._ choler
5、a into their bodies with meals,their bodies were attacked.causeabsorbedmultipliedcure新课讲解新课讲解Stage 3Think of a methodBegan to gather information to 5._ that the second theory was correct.Stage 4Collect resultsMarked where the dead people had lived on a(n)6._.Stage 5Analyse the resultsLooked into the
6、 7._ of the water to see if the problem was the water.mapprovesource新课讲解新课讲解Broad StreetMany deaths happened here.No death happened here.The water from the pump was to blame.Public houseSmall,white,flocculent particlesThe water was from the river which had been polluted by the dirty water from Londo
7、n.新课讲解新课讲解Stage 6Find supporting evidenceFound supporting evidence from two other deaths:Both of them died of cholera after 8._.Stage 7Draw a conclusion 9._ carried the virus.All the water supplies should be 10._.drinking the water Polluted waterexaminedextra evidence:A woman and her daughter who li
8、ved far away but drank the water also died.新课讲解新课讲解Number these events in the order that they happened._ John Snow began to test two theories._ An outbreak of cholera hit London in 1854._ John Snow marked the deaths on a map.124新课讲解新课讲解_ He announced that the water carried the disease._ John Snow in
9、vestigated 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.35678新课讲解新课讲解Answer these questions.1.John Snow believed Idea 2 was right.How did he finally prove it?John S
10、now finally proved his idea because he found an outbreak that was clearly related to cholera,collected information and was able to tie cases outside the area to the polluted water.新课讲解新课讲解2.Do you think John Snow would have solved this problem without the map?Give a reason.No.The map helped John Sno
11、w organize his ideas.He was able to identify those households that had had many deaths and check their water-drinking habits.He identified those houses that had had no deaths and surveyed their drinking habits.The evidence clearly pointed to the polluted water being the cause.新课讲解新课讲解3.Cholera was a
12、 19th century disease.What disease do you think is similar to cholera today?Why?Three diseases,which are similar today,are SARS,AIDS and bird flu,because they are serious,have an unknown cause and need public health care to solve them.新课讲解新课讲解What should you do if youre travelling to a country that
13、has a cholera outbreak?小组活动小组活动*Eat only food thats been thoroughly cooked and is still hot,or fruit that youve peeled yourself.*Avoid undercooked or raw fish and shellfish.*Drink only water that you have boiled or treated with chlorine or iodine.Other safe drinks include tea or coffee made with boi
14、led water and carbonated,bottled beverages with no ice.*Avoid raw salads and vegetables.*Avoid food and drinks from street vendors.Boil it,cook it,peel it,or forget it.小组活动小组活动随堂检测随堂检测请完成 Unit1 Great scientists-Reading 随堂测试！布置作业布置作业根据所学知识，请在线完成Unit1 Great scientists-Reading课后作业。预习任务：1.再次阅读Reading部分，试着找出文中重点单词，并查阅其基本含义和用法。2.找出文章中的长难句，并简要分析。
