课件22张PPT。Unit 1 Great scientistsScience changes our world,so do scientists.Do you remember them?I put forward the theory about black holes.I’m the father of super hybrid riceWho are they?Guessing gameWho is he?He is called the greatest scientist in the 20th
century.He is famous for the Theory of Relativity(相对论).He is … Albert EinsteinImagination is more important than knowledge"想象力比知识更重要."imaginativeWho is he?He invented electric bulbs(电灯).He made more than 1,000 inventions during
his life.He is … Thomas Alva EdisonThomas Alva EdisonGenius is one percent inspiration and ninety-nine percent perspiration.天才就是百分之九十九的汗水加上百分之一的灵感.Who is she?She is a woman scientist.She discovered radium(镭)and polonium(钋).
In her life, she won the Nobel Prize twice.She is … Marie CurieNothing in life is to be feared. It is only to be understood.生活中没有什么可怕的东西,只有需要理解的东西.Who is he?He is a Chinese scientist.He invented the earliest instrument to
tell people where earthquakes happened. He is … ZhanghengJohn SnowJohn Snow is a well-known doctor in the 19th century in London and he defeated “King Cholera”.Who is he?He is a famous doctor in London.He defeated “King Cholera”He is … bacteria of choleraWhat is choleraWhen you eat some seafood , unclean food or drink polluted water. ……You feel……
(for example)Maybe you have got ________.CholeraLet’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 did John Snow do?
(What's his occupation? )
What happened in 1854?
How many people died in 10 days?
physicianCholera outbreak hit London.500Fast readingwhy?Neither its cause, nor its cure was understood. The cholera was the most deadly disease of its day. What caused cholera(two theories)?Details Para1-2Which theory did John believe in?idea 1idea 2Cholera multiplied in the air. A cloud of dangerous gas floated around until it found its victims.People absorbed this disease into
their bodies with their meals.A map of Broad StreetWhat method did he use?Broad StreetMany deaths happened here.No death happened here.The water from the pump was to blame.Para3-4New Words Studywater pump & handleThere were some water pumps in different districts in England in the 1850s. People could use them to pump the water for daily life, but if someone removed the handle from the water pump, it could not be used.
analyze the results: What happened to the pump water?The water was from the river polluted by the dirty water from London.Para5-6find supporting evidence : What extra evidence did he find?two other deaths A woman and her daughter
who lived far away but drank
the water also died.
draw a conclusion with certaintyThe polluted water
carried the virus.What did John Snow suggest?He suggested that the source of all the water supplies be examined.Para7 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 ______ 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 _______.
Finally, “King Cholera” was defeated.doctor19thcausedefeatbrokemarkedpumpsourceexaminedgatherDraw a conclusion
Think of a method
Collect results
Make a question
Find a problem
Analyse results
Find supporting evidenceIf you were a scientist,you might do
the following things.draw a conclusionfind a problemmake a questionthink of a methodcollect resultsanalyse the results find supporting evidencePara 1Para 2Para 3Para 4Para 5Para 6Match them para 7