1、1Great scientists2WarmingWarming up up341. Which scientist discovered that objects in water are lifted up by a force that helps them float?562. Who wrote a book explaining how animals and plants developed as the environment changed?783. Who invented the first steam engine?James Watt910115. Who disco

2、vered radium?Marie Curie12137. Who was the painter that studied dead bodies to improve his painting of people?14Leonardo da vinci158. Who invented a lamp to keep miners safe underground?Sir Humphry Davy169. He invented the earliest instrument to tell people where earthquakes happened.Zhang Heng1710.

3、 Who put forward a theory about black holes?18Pre-reading:1920infectious diseases : They can be spread to other people. They have an unknown cause. They are difficult to cure. They need public health care to solve them.Put the phrases on page 1 in correct order.2223John Snow defeats “King Cholera”A

4、brief introduction of choleraBroad Street It begins in the stomach and a severe case can lead to death without immediate treatment. 5oo deaths in 10 days in 1854 in London.Spread from one person to another. So it is an infectious Disease. 1. SkimmingWhats the main idea of the passage? John Snow was

5、a well-known doctor in London. The cause of Cholera was polluted water. The source of all drinking water should be examined.A.How John Snow collected, analysed data and found the cause of the disease and solved it .26What is the problem?The cholera was the most deadly disease of its day. Neither its

6、 cause, nor its cure was understood.27make a question: Which theory to believe in? Cholera multiplied in the air without reason. A cloud of dangerous gas would float around until it found its victims.People absorbed it with their meals.28A map of Broad StreetWhat method did he use?Broad StreetMany d

7、eaths happened here.No death happened here.The water from the pump was to blame.Public house29analyze the results: What happened to the pump water?The water was from the river which had been polluted by the dirty water from London.30find supporting evidence : What extra evidence did he find? A woman

8、 and her daughter who lived far away but drank the water also died.draw a conclusion with certaintyThe polluted water carried the disease.1.Draw a conclusionMake 5423671Stages in examining a new scientific idea:draw a conclusionfind a problemmake a questionthink of a methodcollect resultsanalyse the results find supporting evidencePara 1Para 2Para 3Para 4Para 5Para 6 Para 7 33What should we pay attention to in our daily life in order not to get infected with all these infectious diseases? HeaT the food left overnightCook raw