【正文】 Unit 1 Great Scientists Do you know? ? Who discovered that objects in water are lifted up by a force that helps them float? ? Who wrote a book explaining how animals and plants developed as the environment changed? Archimedes Charles Darwin ? Who invented the first steam engine? Thomas Newen ? Who used peas to show how physical characteristics are passed from parents to their children? Gregor Mendel ? Who discovered radium? ? Who invented the way of giving electricity to everybody in large cities? ? Who was the painter that studied dead bodies to improve his painting of people? Maries Curie Thomas Edison Leonardo da Vinci ? Who invented a lamp to keep miner safe underground? ? Who invented the earliest instrument to tell people where earthquakes happened? ? Who put forward a theory about black holes? Sir Humphrey Davy Zhang Heng Stephen Hawking Who is the father of super hybrid rice? Yuan Longping Do you know who defeated “King Cholera”? John Snow John Snow is a wellknown doctor in the 19th century in London and he defeated “King Cholera”. Do you know what kind of disease is 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. Let’s get to know how Dr. John Snow defeated “King Cholera” in 1854 in London in this reading passage: John Snow 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? Cholera outbreak hit London. 500 These families had not drunk the water from the Broad Street pump. Task 1:Skim and Scan Task 2: Read and answer 1 Why couldn’t the cholera be under control at first? 2 Which theory did John Snow believe in? 3 John Snow finally proved the theory he believed by ________. A. gathering information with the help of a map B. looking into the source of the water for Broad Street and Cambridge Street C. Separating those who suffered cholera from those who didn’t D. Both A and B 4 To prevent the cholera from spreading again, what did John Snow do? 1 Why couldn’t 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. 3 John Snow finally proved the theory he believed by ________. A. gathering information with the help of a map B. looking into the source of the water for Broad Street and Cambridge Street C. separating those who suffered cholera from those who didn’t D. both A and B 4 To prevent the cholera from spreading again, what did John Snow do? Suggested that the source of all water supplies be examine. Suggested that new methods of dealing with polluted water be found. Instructed the water panies not to expose people to the polluted water anymore. John Snow Defeats “King Cholera” The passage is written as a report of an experiment and there are 7 steps: a problem:(發(fā)現問題 ) up a question:(形成研究主題 ) of a method:(找出研究方法 ) results:(收集材料 ) results:(分析材料 ) if necessary:(必要時重新分析 ) a conclusion:(得出結論 ) 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 question: Which is right? Paragraph 35: 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 breakout 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 Read the passage again and finish Ex. 1(Page 3). (in 8 minutes) John Snow Defeats “King Cholera” Scientific Report by John Snow The problem The cause Idea 1: Idea 2: The method Nobody knew the 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 The results Idea 1 or 2? Why? The conclusion He found the cause of cholera was the polluted water Idea 2. Because the information showed that the dirty water carried cholera He defeated cholera by examining the water supply and dealing with the polluted water Retell the passage according to below: John Snow was a wellknown ____ 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 decided that the polluted water carried cholera. He suggested that the _____ of all water supply be _______ and new methods of ________ with polluted water be found. Finally, “King Cholera” was defeated. Read the passage again and fill in the blanks: John Snow was a wellknown ____ 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 live