Unit1 great scientists
John Snow Defeats “King Cholera”
1.Which scientist discovered that objects in water are lifted up by a force that helps them float?
B. Archimedes
C. Thomas Edison
A. Charles Darwin
2. Who wrote a book explaining how animals and plants developed as the environment changed?
A. Marie Curie
C. Charles Darwin
B. Gregor Mendel
3.Who invent the first steam engine?
A. Thomas Newcomen
C. Thomas Edison
B. Archimedes
4. Who used peas to show how physical characteristics are passed from parents to their children.
A. Thomas Edison
C. Archimedes
B. Gregor Mendel
5. Who discovered radium?
A. Marie Curie
C. Newton
B. Zhang Heng
6.Who invented the way of giving electricity to everybody in large cities?
A. Stephen Hawking
C. Thomas Edison
B. Archimedes
7.Who was the painter that studied dead bodies to improve his painting of people?
A. Gregor Mendel
C. Marie Curie
B. Leonardo da Vinci
8. Who invented a lamp to keep miners safe underground?
A. Sir Humphry Davy
C. Faraday
B. Thomas Newcomen
9. Who invented the earliest instrument to tell people where earthquakes happened?
A. Charles Darwin
C. Watt
B. Zhang Heng
10.Who put forward a theory about black holes?
A. Stephen Hawking
C. Copernicus
B. Archimedes
What impressed you most in 2003?
Neither its cause, nor its cure was understood.
Which person impress you most during the SARS?
What other infectious diseases do you know?
How do they spread from one person to another?
Do you know anything about cholera?
It was caused by drinking dirty water.

It caused a lot of deaths in the old times in Europe.
John Snow
Who helped to defeat the disease?
1 Why couldn’t cholera be under control at first?
2 Which theory did John Snow believe in?
3 John Snow finally proved the theory 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 B
1 Why couldn’t the cholera be under control at first?
2 Which theory did John Snow believe in?
Neither its cause, nor its cure was understood.
People absorbed cholera into their bodies with their meals.
3 John Snow finally proved the theory 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 B
1.Draw a conclusion:(得出结论)
2.Think of a method:(找出研究方法)
3.Collect results:(收集材料)
4.Make up a question:(形成研究主题)
5.Find a problem:(发现问题)
6.Analyse results:(分析材料)
7.Repeat if necessary:(必要时重新分析)
5
4
2
3
6
7
1
stages in examining a new scientific idea
fill in this form: (in 15 minutes)
John Snow Defeats “King Cholera”
What causes cholera?
Which theory is correct?
using a map
Mark the deaths on the map
1
2
3
4
find out the reasons for deaths
Find other evidence to make sure the conclusion
Polluted water carried the disease
5
6
6
To prevent the cholera from spreading again, what did John Snow do?
examine the source of all water supplies
find new methods of dealing with polluted water
not expose people to the polluted water
The structure of the text
Part One (1)
Introduction of John Snow and Cholera

Part Two (2-6)
How John Snow found the source of Cholera

Part Three (7)
Cholera was defeated at last
Read 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.
doctor
19th
cause
defeat
broke
marked
pump
source
examined
dealing
(in 5 minutes)
Retell the passage according to below:
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.
Para 1: Introduction of John Snow and Cholera
Para 2: Two theories
Find a Problem: What cause cholera?
Make up a question: Which is right?
Para 3: He gathered information to test the theory.
Think of a method: Test two theories by marking on a map
Para 4: Study of the map of the breakout in 1854
Para 5: He looked into the source of the water
Collect the result: Mark the death
Analyse the result: Reason for death and no death
Para 7 : John Snow defeated King Cholera
Para 6 : Find out that cholera was spread by germs.
Repeat if necessary: Find more evidence.
Draw a conclusion: Cholera was spread by germs
Polluted water carried cholera
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