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(共21张PPT)
JOHN SNOW DEFEATS “ KING CHOLERA”
XB2U1 REANDING AND THINKING
Learning objectives:
By the end of this class, I am able to:
approach a passage by asking questions.
sort out John Snow’s research by following the scientific research stages;
extract scientific spirits from John Snow’s research;
JOHN SNOW DEFEATS “ KING CHOLERA”
XB2U1 REANDING AND THINKING
John Snow Defeats “King Cholera”
Based on the title and pictures below, what will probably be talked about in the passage
Cholera used to be one of the most feared diseases in the world, until a British doctor, John Snow, showed how it could be overcome. This illness causes severe diarrhoea, dehydration, and even death. In the early 19th century, when an outbreak of cholera hit Europe, millions of people died from the disease. As a young doctor, John Snow became frustrated because no one knew how to prevent or treat cholera. In time, he rose to become a famous doctor, and even attended to Queen Victoria when she gave birth. However, he never lost his desire to destroy cholera once and for all.
What is Cholera
one of the most feared diseases in the world
causes severe diarrhoea, dehydration, and
even death
Who is John Snow
Cholera used to be one of the most feared diseases in the world, until a British doctor, John Snow, showed how it could be overcome. This illness causes severe diarrhoea, dehydration, and even death. In the early 19th century, when an outbreak of cholera hit Europe, millions of people died from the disease. As a young doctor, John Snow became frustrated because no one knew how to prevent or treat cholera. In time, he rose to become a famous doctor, and even attended to Queen Victoria when she gave birth. However, he never lost his desire to destroy cholera once and for all.
a British doctor
he rose to become a famous
doctor, and even attended to Queen Victoria
Who is John Snow
Cholera used to be one of the most feared diseases in the world, until a British doctor, John Snow, showed how it could be overcome. This illness causes severe diarrhoea, dehydration, and even death. In the early 19th century, when an outbreak of cholera hit Europe, millions of people died from the disease. As a young doctor, John Snow became frustrated because no one knew how to prevent or treat cholera. In time, he rose to become a famous doctor, and even attended to Queen Victoria when she gave birth. However, he never lost his desire to destroy cholera once and for all.
a British doctor
he rose to become a famous
doctor, and even attended to Queen Victoria
What’s your first impression of John Snow
What’s the significance of John Snow’s work
Through Snow’s tireless efforts, water companies began to sell clean water, and the threat of cholera around the world saw a substantial decrease. however, cholera is still a problem. Each year, millions of people around the world get cholera and many die from it. Fortunately, we now know how to prevent cholera, thanks to the work of John Snow. Moreover, in his use of maps and statistics, Snow transformed the way scientists study diseases. For this reason, Snow is considered the father of modern epidemiology.
water companies began to sell
clean water, and the threat of cholera around the world saw a
substantial decrease
we now know how to prevent cholera
transformed the way scientists study diseases
How did John Snow defeat cholera
Discuss in groups and put the following steps in correct order.
analyse the results
ask a question
draw a conclusion
collect data
find a problem
find supporting evidence
think of a method
1
2
3
4
5
6
7
How did John Snow defeat cholera
stage of scientific research the specific information in John Snow’s research
1.find a problem
2.ask a question 3.think of a method
4.collect data 5.analyse the result
6.find supporting evidence 7.draw a conclusion
In general, doctors in those days had two contradictory theories to explain how cholera spread. One theory was that bad air caused the disease. The other was that cholera was caused by an infection from germs in food or water. Snow subscribed to the second theory. It was correct, but he still needed proof. Consequently, when an outbreak of cholera hit London in 1854, Snow began to investigate. He discovered that in two particular streets the cholera outbreak was so severe that more than 500 people died in ten days. He was determined to find out why.
stage of scientific research the specific information in John Snow’s research
1. find a problem
2. ask a question
contradictory theories
two
In general, doctors in those days had two contradictory theories to explain how cholera spread. One theory was that bad air caused the disease. The other was that cholera was caused by an infection from germs in food or water. Snow subscribed to the second theory. It was correct, but he still needed proof. Consequently, when an outbreak of cholera hit London in 1854, Snow began to investigate. He discovered that in two particular streets the cholera outbreak was so severe that more than 500 people died in ten days. He was determined to find out why.
stage of scientific research the specific information in John Snow’s research
1. find a problem
2. ask a question
contradictory theories
two
two contradictory theories
In general, doctors in those days had two contradictory theories to explain how cholera spread. One theory was that bad air caused the disease. The other was that cholera was caused by an infection from germs in food or water. Snow subscribed to the second theory. It was correct, but he still needed proof. Consequently, when an outbreak of cholera hit London in 1854, Snow began to investigate. He discovered that in two particular streets the cholera outbreak was so severe that more than 500 people died in ten days. He was determined to find out why.
stage of scientific research the specific information in John Snow’s research
1. find a problem
2. ask a question
contradictory theories
two
Why was cholera so severe in two particular streets
two contradictory theories
How did John Snow defeat cholera
stage of scientific research the specific information in John Snow’s research
1.find a problem two contradictory theories
why cholera was so severe in two streets
2.ask a question 3.think of a method
4.collect data 5.analyse the result
6.find supporting evidence 7.draw a conclusion
mark on a map
stage of scientific research the specific information in John Snow’s research
4.collect data
the number of death
stage of scientific research the specific information in John Snow’s research
4.collect data
5.analyse the result
multiple deaths(16,37,38,and 40) near _______________________;
no deaths(20,21; 8,9;) because people here __________________；
the number of death
the water pump
drank free beer from the PH instead of water from the pump
Assumption: The water pump __________________
was to blame
stage of scientific research the specific information in John Snow’s research
6.Find supporting details
7. Draw a conclusion
A woman and her daughter living away from Broad Street died because________________________________________________________________________________________
she had the pump
water delivered to her home every day
______________carried cholera germs
The pump water
What further did John Snow do
stage of scientific research the specific information in John Snow’s research scientific spirit
1.find a problem two contradictory theories
why cholera was so severe in two particular streets 2.ask a question 3.think of a method mark on a map 4.collect data collect the number of deaths 5.analyse the result multiple death near the pump a woman and her daughter’s death after drinking the pump water 6.find supporting evidence 7.draw a conclusion The pump water carried cholera germs sympathetic
curious
innovative
exact
never-giving-up
cautious
eager
s
c
i
e
n
c
e
To raise new questions, new possibilities, to regard old problems from a new angle requires creative imagination and marks real advance in science.
— Albert Einstein& Leopold Infeld
Assignment:
Watch the video titled “ the story of cholera”to have a deeper understanding of it;
Write an essay about how John Snow’s work has affected your life.
Thanks for your attention!

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