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1、Unit 1Great scientists1.Which scientist discovered that objects in water are lifted up by a force that helps them float?Archimedesan ancient Greek mathematician&physicist2.Who wrote a book explaining how animals and plants developed as the environment changed?Charles DarwinBritish author of The Orig
2、in of Species 3.Who invented the first steam engine?Thomas NewcomenBritish4.Who used peas to show how physical characteristics are passed from parents to their children?Gregor MendelCzech5.Who discovered radium?Marie CurieMarie Curie(1867-1934),Polish and French,won two Nobel Prizes6.Who invented th
3、e way of giving electricity to everybody in large cities?C.Thomas EdisonAmerican inventor7.Who was the painter that studied dead bodies to improve his painting of people?Leonardo da Vinci Italian artist8.Who invented a lamp to keep miners safe underground?Sir Humphry Davy British,discovered the medi
4、cinal value of nitrous oxide(一氧化二氮一氧化二氮)as anaesthetic(麻麻醉剂醉剂)9.Who invented the earliest instrument to tell people where earthquakes happened?Zhang HengZhang Heng(78-139),Chinese,invented the first seismograph10.Who put forward a theory about black holes?Stephen HawkingBritish scientistPara 1Para 1
5、the most deadly disease of its day;Neither its cause nor its cure was understood.John Snow choleraJohn Snow:_Cholera:_a famous doctor in London;so expert that he attended Queen Victoria as her personal physician.How would it be controlled?find its cause!find its cause!Para 2 Para 2 There were _ theo
6、ries explaining the cause of cholera.twoTheory 1Cholera was spread by_floating in the air to attack people.Theory 2Cholera was spread by _ with whichpeople absorbed this disease into their bodies.mealsa cloud of dangerous gasWhich theory is correct?Which theory is correct?Para 3&4Para 3&4He needed e
7、vidence to prove the theory.In 1854 when another outbreak hit London.In two particular streets.Cholera was so severe there that more than 500 people had died in 10 days.timeplaceWhat did he do firstFirst he marked on a map the exact places where all the dead people had lived.1.Many of the deaths wer
8、e near the water pump.2.Some families had no deaths because they had drunk free beer instead of water from the pump.Water!Water!Para 5Para 51.The water came from _.2.What did Dr.Snow advise the people in Broad Street to do immediately?And what was the result?He advised people to remove the handle fr
9、om the water pump and the disease soon began to slow down.the river that polluted by the dirty water from LondonPara 6Para 6Supporting evidence _ A.A woman who had moved away from Broad Street died after drinking the water,while her daughter didnt.B.Both a woman and her daughter died after drinking
10、the water in another part of London.C.A woman died after she delivered the water from the pump.D.Although a woman and her daughter didnt live in the Broad street,they died after drinking the water from the pump,DPara 7 To prevent the cholera from spreading again,what did John Snow suggest?He suggested that the source of all the water supplies be examined.John Snow Defeats“King Cholera”