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1、Unit 1 Great Scientists,Who is he? What is his achievement?,A great scientist Father of Hybrid Rice The man who puts an end to hunger,1.Which scientist discovered that objects in water are lifted up by a force that helps them float? 2. Who wrote a book explaining how animals and plants developed as
2、the environment changed? 3. Who invented the first steam engine? 4. Who used peas to show how physical characteristics are passed from parents to their children? 5. Who discovered radium?,Quiz,Archimedes/.a:kimi:di:z/ Charles Darwin Thomas Newcomen Gregor Mendel Marie Curie mri kjuri,Archimedes,Anci
3、ent Greek (287-212BC) He was a mathematician(数学家). He found that if you put an object into water, the water pushes the object up. It rises and partly floats. The force of the water pushing it up is the same as the weight of the object.,Charles Darwin,Britain (1808-1882) The Origin of Species,Thomas
4、Newcomen,He made a significant contribution to the Industrial Revolution with his invention of the Steam engine.,Gregor Mendel(G.J.孟德尔 ),Czech (1822-1884) The father of genetics,Marie Curie,Polish and French (1867-1934),6. Who invented the way of giving electricity to everybody in large cities? 7. W
5、ho was the painter that studied dead bodies to improve his painting of people? 8. Who invented a lamp to keep miners safe underground? 9. Who invented the earliest instrument to tell people where earthquakes happened? 10.Who put forward a theory about black holes?,Thomas Edison Leonardo da Vinciliun
6、:dudvinti Sir Humphry Davy Zhang Heng Stephen Hawking,Thomas Edison,American (1847-1931),Leonardo da Vinci,Italian (1452-1519) Major works: Virgin of the Rocks The Last Supper Mona Lisa,Sir Humphry Davy,British (1778-1829),Zhang Heng,Chinese (78-139),Stephen Hawking,British (1942-) Theoretical Physi
7、cist A Brief History of Time,John Snow Defeats “King Cholera”,Pre-reading: Make a prediction about what this text will be about according to the title.,John Snow,British ( 1813 1858) a legendary(传说中的) figure in the history of public health,霍乱(cholera)，早期译作虎烈拉，是由霍乱弧菌所致的烈性肠道传染病(infectious disease) ，解放
8、后我国已消灭本病。霍乱为我国法定的甲级烈性传染病，要求在发现确诊或疑似病例后2小时内上报,Think about other infectious diseases you have known?,Extensive Reading,1.The main idea of the text,2.Read the whole text and finish exercise 1 in page 3,John Snow defeated “King Cholera”,with the help of scientific research,Scientific Research,Basic step
9、s of scientific research 1. Find a problem 2. Make a question 3. Think of a method 4. Collect results 5. Analyse result 6. Find supporting evidence 7. Draw a conclusion,Why these steps are necessary for scientific research?,Careful Reading,Finish the chart,Find a problem 2. Make a question 3. Think
10、of a method 4. Collect results 5. Analyse result 6. Find supporting evidence 7. Draw a conclusion,-What causes cholera?,-Which theory is correct?,-Gather information when another outbreak hit London in 1854,-Make a map to find out where people died or did not died,-Look into the source of water and
11、analyse the water,- Find supporting evidence from two other deaths,-The polluted water carried the virus,Solution Remove the handle from the pump The source of all the water be examined 3.Water companies were instructed not to exposed people to polluted water anymore.,Exercise Filling the blanks wit
12、h useful words and expressions in the text,John Snow was a very expert doctor in London. He thought about ordinary people_ cholera. There were two theories he became interested in. One is that cholera_ in the air, the other is that people _ this disease into their bodies with their meals. John Snow_
13、 that the second theory was correct, and he determined to find out why. First, he marked on a map which gave him a valuable clue that many of the deaths were near the_ in Broad street. It seemed that the water_. Next, John Snow_the source of the water and found that it came from the river_by the dir
14、ty water from London. After that , he found_from two deaths. Then he was able to _with certainty that_ carried the virus.,exposed to,multiplied,absorbed,suspected,water pump,was to blame,looked into,polluted,announce,the water,extra evidence,Open Question,1. After reading the whole text, what do you
15、 think about John Snow? 2. Can you name some other scientists nowadays like John Snow? 3. What do you think they have in common?,Language Points,1.attend vt 建造 put up with 忍受,examine 1)检查,审查,研讨; 2)考试,考核 3)盘问 They examined our passports very carefully. The Congress examined and approved the draft budget. He examined the boys in English. He was examined by the police. examination/exam n. 考试,1）conclusion作名词，意为“结束，结论”,form ones conclusion 得出自己的结论 make/draw a conclusion 得出结论 come to/reach/arrive at a conclusion 得出结论 bring.to a conclusion 结束(完成) in conclusion 最后,It is premature to make
