1、Unit 1,Great scientists,characteristic radium painter scientific conclude conclusion analyse,n. 特征; 特性 n. 鐳 n. 畫家; 油漆匠 adj. 科學(xué)的 vt. & vi. 結(jié)束； 推斷出 n. 結(jié)論；結(jié)束 vt. 分析,Words preview,put forward draw a conclusion,提出 得出結(jié)論,Warming Up,What do you know about great scientists? Try this quiz and find out who kno

2、ws the most.,1. Which scientists discovered that objects in water are lifted up by a force that helps them float?,Archimedes,2. Who wrote a book explaining how animals and plants developed as the environment changed?,Charles Darwin,3. Who invented the first advanced steam engine?,Thomas Newcomen,4.

3、Who used peas to show how physical characteristics are passed from parents to their children?,Gregor Mendel,5. Who discovered radium?,Marie Curie,6. Who invented the way of giving electricity to everybody in large cities?,Thomas Edison,7. Who was the painter that studied dead bodies to improve his p

4、ainting of people?,Leonardo da Vinci,8. Who invented a lamp to keep miners safe underground?,Sir Humphry Davy,9. Who invented the earliest instrument to tell people where earthquakes happened?,Zhang Heng,10. Who put forward a theory about black holes?,Stephen Hawking,Do you know how to prove a new i

5、dea in scientific research?, What order would you put them in ?,draw a conclusion,think of a method,collect results,make a question,find a problem,analyse the results,find supporting evidence,find a problem,make a question,think of a method,collect results,analyse the results,draw a conclusion,How t

6、o prove a new idea in scientific research?,find supporting evidence,John Snow defeats “King cholera”,Reading,According to the passage. please put the 7 stages in right order,Fast-reading,Match them,Para 7,Prevention of Cholera,John snow was a famous _,so _ that he _ Queen Victoria as her personal_.

7、But he thought about helping ordinary people _cholera. He wanted to face the _and _ this problem.,Paragraph 1:,doctor,expert,attended,physician,exposed to,challenge,solve,Find a problem,Whatre the two theories?,Paragraph 2:,Make a question,1: Cholera multiplied in the air., 2: People absorbed this d

8、isease into their body with their meals.,Paragraph 3:,Think a method,When another outbreak hit London in 1854,what did he do ?,Broad Street,Many deaths happened here.,No death happened here.,Public house,Paragraph 4:,Collect results,First he _ _ a map to find that many of the deaths were near the _

9、_in broad street ,but some houses had_ _. So he made further _. He _that those people had not drunk the water from the pump. It seems that the water was to _.,marked on,water pump,no deaths,investigations,discovered,blame,Paragraph 5:,Analyse results,What did John snow do next?,Paragraph 6:,What ext

10、ra evidence did he find?,Finding supporting evidence,A woman and her daughter who moved away but drank the water also died.,Paragraph 7:,Draw a conclusion,It was certain that polluted water carried the virus. The source of all the water supplies should be examined.,Retelling Fill in the blanks: John

11、 Snow was a well-known _in London in the _ century. He wanted to find the _ of cholera in order to _ it. In 1854 when a cholera _ out, he began to gather information. He _ on a map where all the dead people had lived and he found that many people who had drunk the dirty water from the _ died. So he

12、decided that the polluted water _cholera. He suggested that the _ of all water supplies be _ .The water companies were_ not to expose people to polluted water any more. Finally, “King Cholera” was_.,doctor,19th,cause,defeat,broke,marked,pump,source,examined,carried,instructed,defeated,Number these e

13、vents in the time order.,_ John Snow began to test two theories. _ An outbreak of cholera hit London in 1854. _ John Snow marked the deaths on a map. _ He announced that the water carried the disease. _ John Snow investigated two streets where the outbreak was very severe. _ King Cholera was defeate

14、d. _ He found that most of the deaths were near a water pump. _ He had the handle removed from the water pump.,2,1,3,4,5,6,7,8,Summary,John Snow wanted to find the cause of cholera. He believed that people become ill after eating infected food . He used the next outbreak of cholera to test his idea . He studied a small area of houses which got their Water from the same pump . Many people in the area died. John Snow showed that this was because the water in the pump was infected . He showed that cholera could be defeated if