高二人教新课标版必修五课件Unit 1 Great scientists Great scientists.ppt

Unit 1 Great scientists Reading Reading,高二人教新课标版必修五,1 Do you know how to prove a new idea in scientific research? Discuss in small groups the stages in setting out a new scientific idea. What order would you put them in?,Pre-reading,Draw a conclusion Think of a method Collect results Make a question Find a problem Analyse the results Find supporting evidence,1 2 3 4 5 6 7,Find a problem,Make a question,Think of a method,Collect results,Analyse the results,Find supporting evidence,Draw a conclusion,What do you know about cholera?,It is a kind of terrible disease caused by drinking dirty water and it caused a lot of deaths in the old times and it was very difficult to defeat.,It begins in the stomach and a severe case can lead to death without immediate treatment. And the victims died very quickly from a loss of liquid after severe vomiting (呕吐) and diarrhoea (腹泻).,Bacteria / germs of cholera,John Snow defeats “King cholera”,John Snow (1813-1858) was born and worked as a doctor in Great Britain. He was originally an anaesthetist (麻醉师).,Background,He was so famous that he became the doctor for Queen Victoria at the births of her many children. Four outbreaks of cholera in the 1830s and 1840s killed many people in England. In 1854, “the most terrible outbreak of cholera which ever occurred in the kingdom” began. It was so violent and sudden that 127 people died in the first three days.,Task 1 Fill in this form.,What caused cholera?,Which theory is correct?,Collect data on those who fell ill or died and where they lived.,Plot information on a map to find out where people died or did not die.,Find out where they got the water. Analyse the water to see if it is the cause of the deaths.,Find other evidence to support the analysis.,It was certain that polluted water carried the disease. The source of all drinking water should be examined to make sure it is safe.,1. What do you know about Dr. John Snows being well-known in London?,He attended Queen Victoria as her personal physician.,Task 2 Answer these questions,2. From what disease did Londoners suffer in his age?,They exposed themselves to cholera.,3. Did people know how to cure the disease? 4. When did Dr. Snow think the disease would be controlled?,No.,He knew the disease would never be controlled until its cause was found.,People absorbed this disease into their bodies with their meals. From the stomach the disease quickly attacked the body and soon the affected person died.,5. What was the second theory explaining how the disease killed people?,6. How serious was the disease outbreak in London in 1854?,The cholera outbreak was so severe that more than 500 people died in 10 days.,Yes. The map gave a valuable clue about the cause of the disease.,7. Did the map which Dr. Snow draw help find the cause of the disease?,Many of the deaths were near the water pump in Broad Street.,8. Where were many of the deaths in Broad Street?,9. Why did some houses have no deaths?,These families worked in the pub at 7 Cambridge Street. They were given free beer and so had not drunk the water from the Broad street pump.,It seemed the water was to blame.,10. What did Dr. Snow think was responsible for the disease?,He told the people to remove the handle from the water pump so it could not be used.,11. What did Dr. Snow advised the people in Broad Street do?,12. What else did Dr. Snow find in another part of London?,In addition, he found 2 other deaths.,13. What conclusion did Dr. Snow tell the public?,He announced that polluted water carried the disease.,14. What did Dr. Snow tell the water companies?,They were instructed not to expose people to polluted water anymore.,1 Read the passage and number these events in the order that they happened. 1. An outbreak of cholera hit London in 1854. 2. John Snow began to test two theories. 3. John Snow investigated two streets where the outbreak was very severe. 4. John Snow marked the deaths on a map.,Comprehending,5. He found that most of the deaths were near a water pump. 6. He had the handle removed from the water pump. 7. He announced that the water carried the disease. 8. King Cholera was defeated.,John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water.,2 Read the passage again and answer these questions. 1 John Snow believed Idea 2 was right. How did he finally prove it?,No. The map helped John Snow organize his ideas. He was able to identify those households that had had many deaths and check their water-drinking habits. He identified those houses that had had no deaths and surveyed their drinking habits. The evidence clearly pointed to the polluted water being the cause.,2. Do you think John Snow would have solved this problem without the map? Give a reason.,3 Cholera was a 19th century disease. What disease do