Unit 1 Science and Scientists Reading and Thinking （ppt课件） -2023新人教版（2019）《高中英语》选择性必修第二册.pptx

1、U N I T U N I T 1What disease can you think of when you look at these pictures?COVID-19COVID-19:an infectious disease.It was discovered in the human body in 2019.The virus is generally characterised by fever,dry cough and gradually dyspnea(逐渐出现呼吸困难逐渐出现呼吸困难).The virus was confirmed to be with the phe

2、nomenon of human transmission and have latent(潜在的潜在的)infection.The disease had no specific treatment at that time,so it broke out in 2020 and swept the globe.Do you know how to prove a new idea in scientific research?How many stages are needed to set out a scientific research?What order would you pu

3、t them in?_ analyse the results _ ask a question _ draw a conclusion_ collect data_ find a problem _ find supporting evidence_ think of a methodP2 1Possible answerIn the early 19th century,a similar infectious disease hit Europe.Now,lets read a passage about it to see if the order you decided was co

4、rrect.Read the title and predict.John Snow Defeats“King Cholera”Who?How?What?Main idea:The text is mainly about _ and _ he defeat _John SnowhowKing CholeraRead and finish the tasks as quickly as possible.Para.1Paras.2-3Para.4Para.5 How did John Snow defeat King Cholera?Whats the truth of King Choler

5、a?What is King Cholera?Who is John Snow?Whats the results and significance of John Snows work?Read the passage quickly and match the main idea of each part.Para1 Para 2 Para 4Para 5 John Snow desired to destroy cholera.John Snow decided to prove the second theory.Snow began his study by marking on t

6、he mapand the process.Truth of the infection of choleraSnows contributionsPara 3 Read the passage quickly and get the main idea of each paragraph.Skimming:main idea of each paragraphPara1 Para 2 Para 4Para 5 Para 3 Task1.Read the 1st paragraph quickly and fill in the mind map.CholeraWhat?Its one of

7、_ in the world,because it causes .When?_Where?_Whats the result?_the most feared diseasessevere diarrhoea,dehydration and even death In the early 19th centuryEuropeMillions of people died from the diseaseJohn SnowWho?A doctor who even attend to when she gave birth.What?He had a desire to _ once and

8、for all.BritishQueen Victoriadestroy choleraRead paras.2-3 again and complete the chart below.A:It was believed that cholera was caused by bad _ or germs in _.B:Snow _ the places where the people who _ had lived.C:Many deaths occurred near the _ in Broad Street.Some people _ drunk the water from the

9、 pump,and lived.A woman and her daughter died in another part of London after _.D:The pump water carried _.E:The _ of the pump was removed.Match the following headers with the letters from the chart above.Write A-E in the blanks.1.conclusion 2.evidence 3.process 4.solution 5.theories _ _ _ _ _airfoo

10、d or watermarked ona mapdiedwater pumphadntdrinking water from the pumpcholera germshandleDCBEAconclusionevidenceprocesssolutiontheoriesP3 3P3 4multiple deaths happened here.No death happened here.The water from the pump was to blame.Public houseClue:free beer from public houseResult:The water came

11、from the river which had been polluted by the dirty water from London.Read paras.2-3 to see if the order you decided was correct and complete the table below.OrderStage Key words or sentences1Find a problem2Ask a question3think of a method4collect data5analyse the results 6find supporting evidence7d

12、raw a conclusionTwo contradictory theoriesP2 2Check your answers.find a problem ask a question think of a method collect data analyse the results find supporting evidence draw a conclusion _ a conclusion_a method _ data _the results_ supporting evidence _a question _a problemFindAskThink of CollectA

13、nalyseFindDrawk Fill in the blanks and review the 7 stages.stages of a scientific research Task4.Read Para.4 and 5 carefully to answer the four questions.1.What caused the outbreak of cholera in London in 1854?2.Was cholera destroyed completely?3.Why was John Snow considered the father of modern epi

14、demiology?4.How can we prevent cholera?1.What caused the outbreak of cholera in London in 1854?The water which came from the River Thames and had been infected by waste.Para.4:The truth was that the water from the Broad Street pump had been infected by waste.Some companies sold water from the River

15、Thames that was polluted by raw waste.Task4.Read Para.4 and 5 carefully to answer the four questions.2.Was cholera destroyed completely?No.Para.5:Through Snows tireless efforts,water companies began to sell clean water,and the threat of cholera around the world saw a substantial decrease.However,cho

16、lera is still a problem.Each year,millions of people around the world get cholera and many die from it.Task4.Read Para.4 and 5 carefully to answer the four questions.3.Why was John Snow considered the father of modern epidemiology?1.He helped people know how to prevent cholera.2.He transformed the w

17、ay scientists study diseases in use of map and statistics.Para.5:Fortunately,we now know how to prevent cholera,thanks to the work of John Snow.Moreover,in his use of maps and statistics,Snow transformed the way scientists study diseases.n.统计数字Task4.Read Para.4 and 5 carefully to answer the four que

18、stions.4.How can we prevent cholera?By drinking pure or boiled water.Para.4:The truth was that the water from the Broad Street pump had been infected by waste.The people who drank this water were much more likely to get cholera than those who drank pure or boiled water.a.干净的Task4.Read Para.4 and 5 c

19、arefully to answer the four questions.1.Q:What _?A:Snow thought that cholera was caused by germs in food or water.2.Q:Why _ _?A:Snow had the handle from the pump removed so that it could not be used.3.Q:How _?A:The cholera threat was defeated thanks to the work of John Snow.What questions would you

20、ask to get the following answers?did Snow think cholera was caused did Snow have the handle of the pump removedwas the cholera threat defeatedAsk questionsOne way to approach a reading passage is to ask questions about it.Asking questions can help you understand the content.It can also help you thin

21、k more deeply about the topic.P3 5Find a problemMillions of people died from _,but no one knew how to _ or _ it.Ask a questionTheory 1:Cholera was caused by _.Theory2:Cholera was caused by _ _Think of a methodSnow subscribed to the _ theory.He began to _.Collect dataSnow investigated the two particu

22、lar streets where _ _.He _ _ _ where all those who died had lived.Analyse the resultsThere were multiple deaths _.Some households had no deaths because they drank free beer.Snow suspected that _ _ _.Find supporting evidenceA woman and her daughter died of cholera though they had moved away,because t

23、hey _.Draw a conclusion_.cholerapreventtreatbad airan infection fromgerms in food or watersecondinvestigatethecholera outbreak was very severemarked on a map the exact placesnear the water pump in Broad Street the water pump was to blamehad the water delivered to their house every dayThe pump water

24、carried cholera germsIn our daily life,in order not to get infected with the infectious disease,such as cholera,AIDS,SARS,what should we do？Wash hands oftenchoose fresh sea foodKeep the kitchen cleandeal with rubbish properly.Drink boiled waterDont forget to wear a mask when you go out.Discussion:Critical ThinkingHomework:1.Read the passage and review the words and expressions in it.2.Retell how John Snow defeated cholera.Thanks