课件33张PPT。Unit 1 Great Scientists Archimedes
阿基米德Charles Darwin
达尔文Thomas Newcomen
纽可门Marie Curie
居里夫人Gregor Mendel
门德尔Leonardo da
Vinci 达芬奇Humphry Davy 汉弗莱 戴维Stephen Hawking
斯帝芬 霍金Thomas Edison1.Which scientist discovered that objects in water
are lifted up by a force that helps them float?B. ArchimedesC. Thomas EdisonA. Charles Darwin2. Who wrote a book explaining how animals and
plants developed as the environment changed?A. Marie CurieC. Charles DarwinB. Gregor Mendel3.Who invented the first steam engine?A. Thomas NewcomenC. Thomas EdisonB. Archimedes4. Who used peas to show how physical
characteristics are passed from parents to their
children.A. Thomas EdisonC. ArchimedesB. Gregor Mendel5. Who discovered radium?A. Marie CurieC. NewtonB. Zhang Heng6.Who invented the way of giving electricity to
everybody in large cities?A. Stephen Hawking C. Thomas EdisonB. Archimedes7.Who was the painter that studied dead bodies to
improve his painting of people?A. Gregor MendelC. Marie CurieB. Leonardo da Vinci 8. Who invented a lamp to keep miners safe
underground?A. Sir Humphry Davy C. FaradayB. Thomas Newcomen9. Who invented the earliest instrument to tell people
where earthquakes happened?A. Charles DarwinC. Watt B. Zhang Heng10.Who put forward a theory about black holes?A. Stephen HawkingC. CopernicusB. Archimedessimilaritiescareful hard-workingstrictpositivetalentedcreativebrightstrong- willedWhat should scientists do to prove a new idea in scientific research?Pre-readingDraw a conclusion Think of a method
Collect results Make up a question
Find a problem Analyse the results
Repeat if necessaryWhat order would you put the seven in?Find a problem Make up a question Think of a method Collect results Analyse the results Repeat if necessary Draw a conclusion What impress you most in 2003?infectiousWhat other infectious diseases do you know?For example: When you eat some seafood……You feel……Maybe you have got ________.CholeraJohn SnowJohn Snow defeats “King cholera”ReadingWho defeats “King Cholera“?
How many theories did John Snow got interested in?
What happened in 1854?
Why was there no death at No. 20 and 21 Broad Street as
well as at No. 8 and 9 Cambridge Street?
John SnowAnother Cholera outbreak hit London.These families had not drunk the water from the Broad Street pump.twoJohn Snow Defeats “King Cholera”What causes cholera?Which theory is correct?Gather information when another Cholera hit London in 1854.He marked on a map where all the dead people had lived.Looked into the source of the water.Two other deaths.The water is to blame. The source of all drinking water should be examined.Nobody knew the cause of the serious disease of choleraa strange cloud of gas attacked people.people absorbed the disease with mealsgather information from cholera outbreakHe found the cause of cholera was the polluted waterIdea 2. Because the information showed that the dirty water carried choleraHe defeated cholera by examining the water supply and dealing with the polluted water 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 BRead the passage again and fill in the blanks:
John 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 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.doctor19thcausedefeatbrokemarkedpumpsourceexamineddealing (in 5 minutes)Discussion: Discuss the following questions in groups of four.1.2.3.Cholera was a 19th century disease. What disease do you think is similar to cholera today?John Snow believed Idea 2 was right. How did he finally prove it?Do you think John Snow would have solved this problem with- out the map? Give a reason. Two diseases, which are similar today, are SARS and AIDS because they are both very serious, have an unknown cause and public health care to solve them. 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.Keys1.2. No. The map helped John Snow organise 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.3.Let’s have a competition!ExtensionSpeaking activityDiscuss in groups of four, which field do you want to contribute yourself to in the future? One takes down the groupmates’ opinions, after that ,report the groupmates’ opinions to the whole class.