Unit1Greatscientists

1、Unit 1 Great scientistsTeach ing aims1.To help stude nts lear n to describe people2.3.To help stude nts lear n to read a n arrati on about Joh n Snow"Great scientistsTo help stude nts better un dersta nd4.5.To help stude nts lear n to use some important words and exp ressi onsTo help stude nts

2、ide ntify exa mples of“ The P ast P artici pie (1) as the P redicative & theattribute ”P eriod 1 Warming up and readi ngTeach ing ProceduresI. Warming upStep I Lead inTalk about scie ntist.T: Hi, morning, class. Nice to see you on this sp ecial day, the day whe n you become a seniortwo grader. I

3、 am happy to be with you helping you with your En glish. Today we are to read about's define the word“ scientist” . What is a scientist?a certa in scie ntist. But first letA scie ntist is a person who works in scie nee, trying to un dersta nd how the uni verse or otherthings work.Scie ntists can

4、 work in differe nt areas of scie nee. Here are some exa mpl es: Those that studyphysics are physicists. Those that study chemistry are chemists. Those that study biology arebiologists.Ste p IIAsk the stude nts to try the quiz and find out who knows the most.T: There are some great scie ntific achie

5、veme nts that have cha nged the world. Can you n amesome of them? What kind of role do they p lay in the field of scie nee? Do these achieveme nts haveanything in com mon? Match the inven ti ons with their inven tors below before you an swer allthese questi ons.1. Archimedes, An cie nt Greek (287-21

6、2 BC), a mathematicia n.2. Charles Darwi n, Britai n (1808-1882). The name of the book is Origin of Sp ecies.3. Thomas Newcome n, British (1663-1729), an inven tor of steam engine.4. Gregor Men del, Czech, a bota nist and gen eticist.5. Marie Curie, Polish and Fren ch, a chemist and p hysicist.6. Th

7、omas Edis on, America n, an inven tor.7. Leon ardo da Vin ci, Italia n, an artist.8. Sir Humphry Davy, British, an inven tor and chemist.9. Zhang Heng, an cie nt China, an inven tor.10. Stepper Hawk ing, British, a p hysicist.II. Pre-readi ngSte p IGet the stude nts to discuss the questi ons on p ag

8、e 1 with their partn ers. Then ask the stude nts to report their work. En courage the stude nts to exp ress their differe nt opinions.1. What do you know about in fectious diseases?In fectious diseases can be spread to other people. They have an unknown cause and n eed p ublic health care to solve t

9、hem. People may be expo sed to in fectious disease, so may ani mals, such as bird flu , AIDS, SARS are infectious diseases. Infectious diseases are difficult to cure.2. What do you know about cholera?Cholera is the ill ness caused by a bacterium called Vibrio cholerae. It in fects people in testi ne

10、s（肠），caus ing diarrhea and leg cramps （扌由筋）.The most com mon cause of cholera is by some one eat ing food or drinking water that has bee n con tam in ated（污染）with the bacteria.Cholera can be mild（不严重的）or even without immediate symptoms（症状），but a severe case can lead to death without immediately trea

11、tme nt.3. Do you know how to prove a new idea in scie ntific research?in scientific research?Anybody might come out with a new idea. But how do we prove itThere are seve n stages in exam ining a new idea in scie ntific research. And they can be put in the follow ing order. What order would you put t

12、he seve n in? Just guess.Find a p roblemMake up a questi onThink of a methodCollect resultsAn alyse the resultsDraw a con clusi onRep eat if n ecessaryIII. Readi ngStep I P re-readi ng1. Do you know John Snow?John Snow is a well- known doctor in the 19th century in London and he defeatedCholera“ Kin

13、g2. Do you know what kind of disease is cholera?It is a kind of terrible disease caused by drinking dirty water and it caused a lot of deaths inthe old times and it was very difficult to defeat.Let ' s get to know how Dr. John Snow defeated“ King Cholera ” in 1854 in Lon don in thisreadi ng pass

14、age:Ste p II Skimmi ng1.Read the p assage and an swer the questi ons.Who defeats “ King Cholera （John Snow）2.What happened in 1854?（Cholera outbreak hit London.）3.4.How many peo pie died in 10 days? （500）Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 CambridgeStreet?(T

15、hese families had not drunk the water from the Broad Street pump.)(Op tio nal)Skim the p assage and find the in formatio n to compi ete the form below.WhoWhe nWhatHowResultJoh n Snow1854hel ping ordi nary people exposed to choleraExamining the source of all water supplies and finding new methods of

16、deali ng with p olluted waster“ King Cholera defeatedStep HI ScanningRead the p assage and nu mber these events in the order that they happened.2 Joh n Snow bega n to test two theories.1 An outbreak of cholera hit Lon don in 1854.4 Joh n Snow marked the deaths on a map.7 He announced that the water

17、carried the disease.3 Joh n Snow in vestigated two streets where the outbreak was very severe.8 King Cholera was defeated.5 He found that most of the deaths were n ear a water pump.6 He had the han die removed from the water pump.Step IV Main idea and correct stageRead the p assage and put the corre

18、ct stages into the readi ng about research into a disease.John Snow Defeats “ King Cholera ”Paragra phStagesGen eral ideas1Find a p roblem: What cause the cholera?The causes of cholera2Make up a questi on: Which is right?The correct or po ssible theory3Think of a method: Test two theoryCollect data

19、on where people were ill and died and where they got their water4Collect results: Mark the deathPlot information on a map to find out where people died or did not die5An alyze the results:Find the resource of the waterLook into the water to see if that is the cause of the ill ness6Find supporting ev

20、ide neeFi nd other evide nces to confirm his con clusi on7Draw a con clusi onThe polluted dirty source of drinking water was to blame for the cause of the London choleraStep V Group discussi onAn swer the questi ons (Finish exercise 2 on Page 3)1. Joh n Snow believed Idea 2 was right. How did he fin ally prove it?(Joh n Snow fin ally p roved his idea because he found an outbreak that was clearly relatedto cholera, collected in formati on and was able to tie cases outside the area to the p olluted water.)2. Do you think Joh n Snow would have solved this p roblem without the map?(No. The m