人教版必修五Unit 1 Great scientist reading1课件（29张）.ppt

1、Great scientists,Unit 1,JOHN SNOW DEFEATS “KING CHOLERA”,Reading,1. To summarize and remember the main idea of the passage. 2. To speak out the detailed information of the passage. 3. To know more about John Snow and his achievements. 4. To learn some useful words and expressions in the passage.,Obj

2、ectives,Reading strategy,skimming,scanning,a general idea,certain information,titles and headings,the first and last sentences of paragraphs,the first and last paragraphs,pictures and charts,Scan the text for key words and phrases, dates, etc.,Do not need to read the whole text.,Skimming for general

3、 idea,After reading the passage, match the following stages with the paragraphs.,Reading Comprehension I,Skimming,Stages,Draw a conclusion Think of a method Collect results Make a question Find a problem Analyze the results Find supporting evidence,Find a problem,Make a question,Think of a method,Co

4、llect results,Analyse the results,Draw a conclusion,Find supporting evidence,Paragraphs & Stages,First we should find the problem. Then, think of a method. We should collect as much information as possible. Analyzing results is the most important stage. Before we make a conclusion, it is necessary f

5、or us to find supporting evidence.,Summary,Whats the main idea of the passage? A. John Snow was a well-known doctor in London. B. The cause of cholera was polluted water. C. The source of all drinking water should be examined. D. How John Snow collected, analysed data and found the cause of the dise

6、ase and defeated the disease.,Reading Comprehension II,Skimming,Reading Comprehension III,Skimming,Read the passage to find the main idea of each paragraph.,John Snow wanted to use his knowledge to solve cholera.,He got interested in two theories.,He needed to prove the second theory was correct.,He

7、 found out that dirty water was the cause of cholera.,Para. 1,Para. 2,Para. 3,Para. 4,Para. 6,Para. 7,Polluted water carried the virus.,Finally “King Cholera” was defeated.,Para. 5,Cholera was spread by germs and not in a cloud of gas.,Scanning for specific information,Read the passage and number th

8、ese events in the order that they happened.,_ John Snow began to test two theories. _ An outbreak of cholera hit London in 1854. _ John Snow marked the deaths on a map.,Reading Comprehension IV,Scanning,_ He announced that the water carried the disease. _ John Snow investigated two streets where the

9、 outbreak was very severe. _ King Cholera was defeated. _ He found that most of the deaths were near a water pump. _ He had the handle removed from the water pump.,Answer: 2 1 4 7 3 8 5 6,Reading Comprehension V,Why couldnt the cholera be controlled at first? A. Its speed of spreading was so fast. B

10、. Its cause wasnt understood C. Its cure wasnt understood. D. Both B. & C.,Scanning,2. How many people died in 10 days in two particular streets? A. Less than 500. B. More than 500. C. More than 450. D. Less than 450.,3. What attitude did John Snow take to the two supposed theories explaining how ch

11、olera attacked people? A. Doubtful but he could do nothing about it. B. Objective and he asked his assistants to gather information. C. Acceptable and he was sure about the causes. D. Reasonable but they remained to be proved scientifically.,1 John Snow believed Idea 2 was right. How did he finally

12、prove it?,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.,Reading Comprehension VI,Answer these questions.,Scanning,2 Do you think John Snow would have solved t

13、his problem without the map? Give a reason.,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 cle

14、arly pointed to the polluted water being the cause.,3 Cholera was a 19th century disease. What disease do you think is similar to cholera today? Why?,Three diseases, which are similar today, are SARS, AIDS and bird flu, because they are serious, have an unknown cause and need public health care to s

15、olve them.,Discuss the question in groups.,Group Work,What should you do if youre travelling to a country that has a cholera outbreak?,Drink only water that you have boiled. Other safe drinks include tea or coffee made with boiled water, bottled beverages with no ice.,Discussion,Eat only food thats

16、been thoroughly cooked and is still hot, or fruit that youve peeled yourself. Avoid undercooked or raw fish and shellfish. Avoid raw salads and vegetables. Avoid food and drinks from street vendors.,John Snow was a well-known _ in London in the _ century. He wanted to find the _ of cholera in order

17、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,doctor,19th,cause,defeat,broke,marked,Retell the text by filling in the following blanks.,people who had _ the dirty water from the _ died. So he decided that the polluted water carried the virus. He suggested that the _ of all the water supplies be _. The water companies were _ not to expose people to polluted water