unit1_great_scientists.ppt

1、Unit 1 Great Scientists,1. Which scientists discovered that objects in water are lifted up by a force that helps them float?,Archimedes 阿基米德,2. Who wrote a book explaining how animals and plants developed as the environment changed?,Charles Darwin 達(dá)爾文,3. Who invented the first advanced steam engine?

2、,James Watt 瓦特,4. Who used peas to show how physical characteristics are passed from parents to their children?,Gregor Mendel 門德爾,5. Who discovered radium?,Marie Curie 居里夫人,6. Who invented the way of giving electricity to everybody in large cities?,Thomas Edison 愛迪生,7. Who was the painter that studi

3、ed dead bodies to improve his painting of people?,Leonardo da Vinci 達(dá)芬奇,8. Who invented a lamp to keep miners safe underground?,Humphry Davy 漢弗萊 戴維,9. Who invented the earliest instrument to tell people where earthquakes happened?,張衡,10. Who put forward a theory about black holes?,Stephen Hawking 斯帝

4、芬 霍金,Who defeats “King Cholera“? What happened in 1854? How many people died in 10 days? Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 Cambridge Street?,John Snow,Cholera outbreak hit London.,More than 500,These families had not drunk the water from the Broad Street p

5、ump.,1 Why couldnt the cholera be under control at first? 2 Which theory did John Snow believe in?,Neither its cause, not its cure was understood.,People absorbed cholera into their bodies with their meals.,Read the passage again and finish Ex. 1(Page 3).,Scientific Report by John Snow,Nobody knew t

6、he cause of the serious disease of cholera,a strange cloud of gas found its victims,people absorbed the disease with meals,Collect information from the cholera outbreak to prove which theory was correct,He found the cause of cholera was the polluted water,Idea 2. Because the information showed that

7、the dirty water carried cholera,He defeated cholera by examining the water supply and dealing with the polluted water,Mind Map of the text,John Snow Defeats “King Cholera”,Paragraph 1: Introduction of John Snow and Cholera,Paragraph 2: Two theory,Find a Problem: What cause the cholera?,Make a questi

8、on: Which is right?,Paragraph 3-5: Study of the breakout in 1854,Paragraph 3: Study of the breakout in 1854,Think of a method: Test two theory Collect the result: Mark the death Analyse the result: Reason for death and no death,Paragraph 4: Study of the breakout in 1854,Paragraph 5: Study of the bre

9、akout in 1854,Analyse the result: Find the resource of the water,Repeat if necessary: Find more evidence. Draw a conclusion: Cholera was spread by germ Polluted water carried cholera,Paragraph 6: Prevention of Cholera John Snow defeat King Cholera,John snow was a doctor in London. There was the most

10、 deadly called “King Cholera” of its day. Every time there was a (an) ,many people died. John Snow wanted to face the and this problem. He knew that it would never be until its cause was found. At that time, there were two theories about cholera. The first suggested that cholera in the air. The seco

11、nd suggested that people this disease into their bodies with their .John Snow the second theory was correct but he needed evidence. So he data to test the two theories.,He on a map where all the dead people had lived and the map gave a about the cause of the disease . It seemed the water was to .Next,John Snow looked into f