(共18张PPT)
John Snow Defeats “King Cholera”
Unit 1 Science and scientist
Reading and thinking
What other infectious diseases do you know
malaria
SARS
black death
Spanish flu
Ebola
AIDS
smallpox
Cholera
TB
Lead-in
plague
Prediction
Put the stages of scientific research in the correct order.
Stages of Scientific Research
find a problem
draw a conclusion
collect data
ask a question
find the supporting evidence
analyze the results
think of a method
Prediction
Who
How
What
What might be talked about in the text
Why Cholera was called “King” at that time
Personification
Because it claimed/took a lot of lives.
Read for Structure
Scan the whole text and find out the main idea of each part.
Para. 1:
What is cholera Who is Snow
Para. 2-3:
How did Snow defeat cholera
Para. 4:
The truth of cholera
Para. 5:
Results and contribution
Read for Details (Para.1)
Read Para. 1 and finish the information cards
John Snow
King Cholera
Identity:
Symptoms:
Consequence:
Occupation:
Nationality:
Desire:
one of ________________ in the world
_______ of people died from it when it hit Europe in the early 19th century
severe diarrhea, dehydration, and even _____
_______ when she give birth)
the most feared diseases
death
Britain
Millions
A famous _______ (who even attend to _____
doctor
Queen
Victoria
To destroy cholera once and for all.
Read for Details (Para. 2)
What were the two theories and which did John Snow agree with
two contradictory theories
Bad air caused the disease.
Cholera was caused by an infection from germs in food or water.
transmission
Read for Details (Para. 2)
bad air theory
germ theory
Read for Details (Para. 2)
What method did John Snow use
find a problem
ask a question
think of a method
Snow began by marking on a map the exact places where all those who died had lived.
Read for Details (Para. 3)
Pair work: Observe the map and analyze it with questions.
What does “—” mean How about PH
Which house numbers had more than four deaths in Broad Street
Which house numbers had no deaths in Broad Street
Why some households (2o, 21, 8 and 9) had no death
What’s the similarity among the houses in Broad Street that had multiple death
What’s you deduction/assumption
Near the water pump.
The water pump was to blame./There is something wrong with the water pump.
Because these people worked in the pub at 7 Cambridge Street. They had been given free beer, and so had not drunk the water from the pump.
find the supporting evidence
Did John Snow make his research results public the minute he found out that the polluted water might be to blame Why not What did he do instead
Read for Details (Para. 3)
assumption
Read for Details (Para. 3)
supporting evidence
conclusion
action
results
assumption
Let’s review & retell
Stages of Scientific Research
find a problem
ask a question
collect data
think of a method
analyze the results
find the supporting evidence
draw a conclusion
What caused the outbreak of cholera in London in 1854
Was cholera destroyed completely
How can we prevent cholera
What contribution did John Snow make to science
Read paragraph 4-5 and answer the following questions:
Read for Details (Para. 4-5)
The water which came from the River Thames had been infected by waste.
No.
How can we prevent cholera
Drink and use safe water
Wash your hands often
Use toilets
Cook raw food thoroughly, keep it covered, eat it hot
Clean up safely
What caused the outbreak of cholera in London in 1854
Was cholera destroyed completely
How can we prevent cholera
What contribution did John Snow make to science
Watch the video and answer the following questions:
Read for Details (Para. 4-5)
The water which came from the River Thames had been infected by waste.
No.
He helped people know how to prevent cholera.
He transformed the way scientists study disease by using maps and statistics.
contribution
achievement
Why could John Snow defeat King Cholera Discuss the qualities of John Snow based on what he did, giving evidence to support your conclusion.
Homework
Qualities Supporting Evidence
critical thinking; questioning mind
a strong desire to explore
two contradictory theories
Snow subscribed to the second theory. It was correct, but he still needed proof… Snow began to investigate
creative imagination
professional knowledge
use scientific method
precise attitude
innovative spirit