Unit 1 Science and Scientists Reading and Thinking（ppt课件）-2022新人教版（2019）《高中英语》选择性必修第二册.pptx

1、Unit 1 Science and scientistsUnit 1 Science and scientistsJohn Snow Defeats King Cholera授课人watch a clip and write down the names as many as you can Memory Testbiologymedicineagriculturegeologyspace engineeringscienceLatin:“knowledge”Memory TestWarming-upWarming-upWhat is science?“To raise new questi

2、ons,new possibilities,to regard old problems from a new angle,requires creative imagination and marks real advance in science.”-Albert EinsteinScience can be defined as the process of observing and _ the world around us.Scientists aim to get _ through a deciplined set of steps called scientific meth

3、od.questioningknowledgescientific methodWarming-upWarming-upstages of scientific researchanalyse the resultsask a questiondraw a conclusioncollect datafind a problemfind supporting evidencethink of a methodOrder?PairworkPairworkReadingReadingReading for predictionReadingReadingJohn Snow Defeats“King

4、 Cholera”According to the title,the story is going to tell us information about.who is John Snow?what is cholera?how to defeat?John Snow“King Cholera”DefeatsReading for informationa British doctorIn time,he rose to become a famous doctor and even attended to Queen Victoria when she gave birth.expert

5、/experienced/knowledgeableThe father of modern epidemiologyReadingReadingto become more successful,important,powerfulReading for informationIt used to be one of the most feared diseases in the world.cause severe diarrhoea,dehydration,and even death.no one knows how to prevent or treat choleraIt is s

6、till a problem.Fortunately,we know how to prevent it.deadlyuncontrollable“King”ReadingReadingCholera used to be one of the most feared diseases in the world,until aBritish doctor,John Snow,showed how it could be overcome.Thisillness causes severe diarrhoea,dehydration,and even death.In theearly 19th

7、 century,when an outbreak of cholera hit Europe,millionsof people died from the disease.As a young doctor,John Snowbecame frustrated because no one knew how to prevent or treat cholera.In time,he rose to become a famous Doctor,and even attended toQueen Victoria when she gave birth.However,he never l

8、ost his desire.Reading for informationPara1:Find a problemProblemCholera was a deadly disease and people had no idea about its cause or its cure.In general,doctors in those days had two contradictory theories to explain how cholera spread.One theory was that bad air caused the disease.The other was

9、thatcholera was caused by an infection from germs in food or water.Snow subscribed tothe second theory.It was correct,but he still needed proof.Consequently,when an outbreak of cholera hit London in 1854,Snow began to investigate.He discovered that in two particular streets the cholera outbreak was

10、so severe that more than 500 people died in ten days.He was determined to find out why.Reading for informationPara2:Ask a questionQuestionHow did cholera kill people?Snow began by marking on a map the exact places where all those who died had lived.There were multiple deaths near the water pump in B

11、road Street(especially house numbers 16,37,38,and 40).However,some households(such as 20 and 21 Broad Street,and 8 and 9 Cambridge8 Street)had had no deaths.These people worked in the pub at 7 Cambridge Street.They had been given free beer,and so had not drunk the water from the pump.Snow suspected

12、that the water pump was to blame.What is more,in another part of London,a woman and her daughter had died of cholera after moving away from Broad Street.It seemed that the woman liked the water from the pump so much that she had it delivered to her house every day.As a result of this evidence,John S

13、now was able to announce that the pump water carried cholera germs.Accordingly,he had the handle of the pump removed so that it could not be used.Through this intervention,the disease was stopped in its tracks.Reading for informationPara 3:Think of a method&Collect dataBroad Street37403816209821Many

14、 deaths happened here.No death happened here.Public houseIt seemed that the water from the pump was to blame.Analyze the resultsSnow began by marking on a map the exact places where all those who died had lived.There were multiple deaths near the water pump in Broad Street(especially house numbers 1

15、6,37,38,and 40).However,some households(such as 20 and 21 Broad Street,and 8 and 9 Cambridge8 Street)had had no deaths.These people worked in the pub at 7 Cambridge Street.They had been given free beer,and so had not drunk the water from the pump.Snow suspected that the water pump was to blame.What

16、is more,in another part of London,a woman and her daughter had died of cholera after moving away from Broad Street.It seemed that the woman liked the water from the pump so much that she had it delivered to her house every day.As a result of this evidence,John Snow was able to announce that the pump

17、 water carried cholera germs.Accordingly,he had the handle of the pump removed so that it could not be used.Through this intervention,the disease was stopped in its tracks.Reading for informationPara 3:Think of a method&Collect dataFind supporting evidenceDraw a conclusionbeer pubwater pump7Para 4Re

18、ading for thinkingAfter the remove of the handle,the spread of cholera in this area was stopped.How about other parts in London?The government might aske all the water companies to provide clean water.What measures might they take?People might be educated not to drink raw water but pure or boiled wa

19、ter.not purifiedlarge in degreestages of scientific research7.draw a conclusion6.find supporting evidence 5.analyze the results4.collect data3.think of a method2.ask a question1.find a problemReadingReadingReading for thinkingWhat made John Snow succeed in preventing “King cholera”?(try to find supp

20、orting details from the text)1.2.3.4.GroupworkGroupworkReading for thinkingexpertAs a young doctor,John Snow became frustrated.In time,he rose to become a famous doctor.determinedHe never lost his desire to cholera once and for all.careful/rigorous(严谨的)curious/questioning mindHe suspected.He was abl

21、e to announce.He discovered that in two particular streets.find out whycreativeReading for thinkingscientific spiritsscientific methodsscientific success The scientist is not a person who gives the right answers but the one who asks the right questions.Science is a way of thinking much more than it

22、is a body of knowledge.The science of today is the technology of tomorrow.Homework1.Decide on one scientist that you admire most2.Find out one of his most important achievements3.Write down the story Youd better give it a title.If possible,attatch some pictures.Father of hybrid riceThank you!Unit 1 Science and scientistsUnit 1 Science and scientists