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、高二人教版英语选择性必修二第一单元Unit 1 Science and ScientistsLesson 1 Reading and Thinking(1)1.What can you see in the photo?Two girls are conducting an experiment in a school science laboratory,probably to test a theory,verify results,collect data,or develop skills needed in scientific research.2.What qualities d

2、o Einstein and Infeld think a scientist should have?To solve a scientific problem,one not only requires some degree of technical skill but also needs the ability to ask questions and to see things in a new way.To raise new questions,new possibilities,to regard old problems from a new angle,requires

3、creative imagination and marks real advance in science.-Albert Einstein and Leopold Infeld Other qualities:hard-working,patient,passionate,enthusiastic,devoted.Learning Objectives1.understand the importance of a questioning mind by analyzing John Snows scientific spirits.2.understand how John Snow d

4、efeated“King Cholera”by finding stages of scientific research.3.summarize the text after catching details by scanning and skimming and reviewing its main idea.What is cholera?Who is John Snow?How did John Snow defeat“King Cholera”?.What do you want to know about this passage from the title?JOHN SNOW

5、 DEFEATS“KING CHOLERA”Cholera was one of the most feared diseases in the world.What is cholera?What harm does cholera do to people?Why is it called“King Cholera”?Cholera causes severe diarrhoea(腹泻),dehydration(脱水)and even death.Because it was so powerful that it killed millions of people during one

6、outbreak alone and it causes other deadly illnesses.What is cholera?Who is John Snow?(Para.1)A young British who even Queen Victoria when she gave birth.He had a desire to .once and for all.doctorattended todestroy choleratake care of/look afterThe following are seven steps of scientific research.Wh

7、at order would you like to put them in?(Activity 1 on page 2)analyze the results ask a question draw a conclusion collect data find a problem find supporting evidence think of a methodHow did John Snow defeat“King Cholera”?How:Research StepsStep 1 It was believed cholera was caused by or germs in _.

8、How:Research StepsStep 1It was believed cholera was caused by or germs in _.bad airfood or waterfind a problemStep 2Snow was determined to find out .How:Research StepsStep 1It was believed cholera was caused by or germs in _.food or waterfind a problemStep 2Snow was determined to find out .why the o

9、utbreak was so severe in two particular streets ask a questionStep 3Snow the places where the people who had lived.marked on a mapdiedthink of a method(Para.3)BROAD STREETWhat kind of map is it?Its Snows cholera map.What does“”mean?It means one death.What does“PH”mean?It means public house,a house s

10、uch as bar or pub where alcoholic drinks are sold to the public.What does 30,31,.refer to?They refer to numbers of houses.Step 4 The number of deaths in different households was recorded.collect data图片来源于网络BROAD STREET Which house numbers had more than four deaths in Broad Street?House number 16,37,

11、38 and 40 had more than four deaths in Broad Street.Which house numbers had no deaths in Broad Street?House number 14,20,21,25,27,28 and 34 had no deaths in Broad Street.Where is the pump?The pump is near house number 40 in Broad Street.Step 5 Multiple deaths occurred near the in Broad Street,while

12、some people who _ drunk the water from the pump,lived.analyze the resultspumphadntStep 6find supporting evidence图片来源于网络Step 7draw a conclusionWhat is the result of John Snows research?The pump water carried cholera germs,the handle of the pump was removed,and the disease was stopped in its tracks.ha

13、ndle(Para.3)Check your order(Activity 1 on page 2)analyze the results ask a question draw a conclusion collect data find a problem find supporting evidence think of a method6543217 Challenge your short memoryRead paragraph 2&3 again,close your book,and complete the chart below.(Activity 3&4 on page

14、3)airfood or watermarked on a mapdiedwater pumphadnt drinking water from the pumpcholera germshandleairfood or watermarked on a mapdiedwater pumphadnt drinking water from the pumpcholera germshandleMatch the following headers with the letters(A-E)from the chart below.1 conclusion .2 evidence .3 proc

15、ess .4 solution .5 theories .AEBCD What caused the outbreak of cholera in London in 1854?What contributions did John Snow make to science?The cholera was caused by the water which came from the River Thames and had been infected by waste.(Para.4)(Para.5)Further thinkingWhat qualities are crucial in

16、Snows achievements?qualitiesskilled/professionalpersistentpatientdeterminedrigorous(一丝不苟的)innovative.a questioning mindHomework:summarizeYour friend Jack is interested in John Snow defeats“King Cholera”.Please write a summary(about 80 words)of the passage for him.p What is cholera?p Who is John Snow

17、?p How did John Snow defeat“King Cholera”?p What contributions did John Snow make to science?ReviewCholera,causing death and other severe illnesses,used to be one of the most scared diseases in the world,until a young British doctor,never losing his desire to defeat cholera,showed how it could be ov

18、ercome.At first,it was believed cholera was caused by bad air or germs in food or water.Snow subscribed to the latter.When an outbreak struck London in 1854,Snow determined to find out why the outbreak was so severe in two particular streets.Then Snow marked on a map the places where the people who

19、died had lived.On the map the number of deaths in different households was recorded and multiple deaths occurred near the pump in Broad Street,while people who hadnt drunk the water from the pump,lived.Whats more,a woman and her daughter had died of cholera because they had the water delivered to th

20、eir house after moving away.As a result,it was proved that the pump water carried cholera germs and the handle was removed.Consequently,the truth was that the water which came from the River Thames had been infected by waste.Thanks to Snows tireless efforts,the threat of cholera dropped substantially,people now know how to protect themselves from getting cholera.Snow changed the way scientists study diseases so he is regarded as the father of modern epidemiology.One sampleThank you for listening!