Great+scientist--john+snow

1、Unit 1 Unit 1 Great scientistsGreat scientists1. Which scientist discovered that objects in water are lifted up by a force that helps them float?2. Who wrote a book explaining how animals and plants developed as the environment changed?3. Who invented the first steam engine?James Watt5. Who discover

2、ed radium?Marie Curie7. Who was the painter that studied dead bodies to improve his painting of people?Leonardo da vinci8. Who invented a lamp to keep miners safe underground?Sir Humphry Davy9. Who invented the earliest instrument to tell people where earthquakes happened?Zhang Heng10. Who put forwa

3、rd a theory about black holes?JOHN SNOW DEFEATS “KING CHOLERA”A. To show us why John Snow wanted to find a cure for cholera.B. To tell us how John Snow found the cause of cholera and solved it by collecting and analyzing data.C. To show us how difficult it was to carry out experiments at that time.D

4、. To tell us the way cholera spread and how serious it was.Whats the text mainly about?Neither its cause, nor its cure was understood.What may cause cholera?Cholera was the deadly disease of its day.JOHN SNOW DEFEATS“KING CHOLERA”What are the two theories?Cholera multiplied in the air. A cloud of da

5、ngerous gas would float around until it found its victims.People absorbed it with their meals.Which theory is correct?Poor NeighborhoodsWhat conditions allowed cholera to spread so quickly? PubMany deaths happened.No deaths happened.It seemed that the water was to blame. supporting evidenceTwo other

6、 deaths were linked to the Broad Street outbreak.Polluted water carried the virus.Look into the source & analyse the water He found the water was polluted.draw a conclusion with _ certaintyHow to prevent choleraThe source of all the water supplies should be examined.The water companies were instruct

7、ed not to expose people to polluted water any more.An order from the governmentThe style of the passage is a _A. a diary B. an interviewC. a scientific reportD. a novel find supporting evidencethink of a methodcollect resultsmake a questionfind a problemanalyse the resultsdraw a conclusionPut the 7

8、stages in the right order.Para.7 Be sure of the causePara.1 What causes cholera?Para.2 Which theory is correct?Para.3 Gather information about victims Para.4 Make a map to find out the causePara.5 Look into the source of water& analyse the waterPara.6 Find supporting evidencedraw a conclusionfind a

9、problemmake a questionthink of a methodcollect results analyse the resultsfind supporting evidencePara.7 Be sure of the causePara.1 What causes cholera?Para.2 Which theory is correct?Para.3 Gather information about victims Para.4 Make a map to find out the causePara.5 Look into the source of water& analyse the waterPara.6 Find supporting evidenceHow to prove a new idea in scientific research?2010-2012 Haiti（海地）（海地） Cholera Outbreak How to prevent and treat cholera in our daily life ? Heal the food left ov