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(共24张PPT)
Unit One SCIENCE AND SCIENTISTS
John Snow Defeats "King Cholera"
Now, let’s enjoy a video.
What have we Chinese people experienced since the end of 2019
An outbreak of COVID-19 suddenly hit China.
COVID-19
（新冠肺炎）
What do you know about COVID-19
COVID-19
infectious
unknown cause
difficult to cure
spread easily
Discussion
deadly
give up
fight
A deadly disease called cholera hit London in 1854.
127 people died in the first three days. Many thousands of terrified people died every time there was an outbreak.
John Snow Defeats “King Cholera”
Who
What
How does he defeat it
What can you learn from the title
beat /fight against
2
3
4
1
5
Read the text quickly and try to get the main idea of each paragraph with key words.
The text
What
Who
How
The truth
Results and
significance
Structure of
the
text
______ caused the cholera
Which _______ of the two is correct
Marking the deaths on the_____
Get the __________from the map
The _____ seems to be blame for the cholera.
Two other _______
Polluted ______ carried the virus.
What
theory
map
information
water
deaths
water
Find a problem
Ask a question
Analyze the results
Collect data
Draw a conclusion
Find supporting evidence
Think of a method
stages of a scientific research
Para 1
1.Who is John Snow
2.What is the basic information about cholera
Who is John Snow
A famous doctor in London.
relationship
John Snow attended to Queen
Victoria when she gave birth.
The basic information about cholera
What It is one of _____________________ because it causes severe symptoms，even _____.
When ________________________________
Where ____________
What consequence _________________________
germs of cholera
the most feared diseases
death
in the early 19th century
Europe
Millions of people died.
How did cholera spread
Cholera was caused by_________.
bad air
Cholera was caused by___________ _________________________.
an infection
from germs in food or water
In John's opinion,which
theory is correct
Para 2
How did John Snow find the clue
The map gave a valuable clue about the cause of the disease.
Para 3
Broad Street
It seemed that the water from the pump was to blame.
Public house
What was to blame
Many deaths happened here.
No deaths happened here.
Why
It was believed that cholera was caused by bad ____or germs in ______________.
Snow______________ the places where the people who_____had lived.
Many deaths occurred near the __________ in Broad Street.
Some people who hadn't drunk ________ from the pump lived.
A woman and her daughter died in another part of London after______ ________________________.
The pump water carried __________.
The ________of the pump was removed.
air
food or water
marked on a map
died
water pump
drinking
the water from the pump
cholera germs
handle
Para
2,3
Read paragraph 2＆3 again and complete the chart below.
the water
find a problem and ask
a question
think of a method and
collect data
draw a conclusion
analyze the results and find
supporting evidence
solve the problem
Para 4,5
Read the two paragraphs carefully and choose the correct answer.
1.What caused the outbreak of cholera in London
A. Bad air.
B. Polluted water from the pump.
C. Hot weather.
D.The reason was unknown.
2.How can we prevent cholera
A.By drinking pure or boiled water, and eating clean food.
B.By breathing clean air.
C.By washing hands more frequently.
D.By staying at home.
3.Which statement is correct
A.Cholera had been destroyed completely.
B.We still don't know how to prevent cholera.
C.John Snow made great contributions to society.
D.The way scientists study diseases is the same as before.
Further reading
Complete the following grammar filling using suitable words.
In the 19th century(1) ___ outbreak of cholera hit London,
(2)______(leave)millions of people dead.John Snow subscribed
to the theory(3) ___ cholera was caused by an(4) _______(infect)
from germs in food or water.To find the proof,he marked on the
map the places(5) _____ all those who died had lived.It seemed
that the people who drank(6) ______(pollute) water from River
Thames were much(7) ________(likely)to get cholera than those
(8) ______(drink)pure water.Thanks(9) ___Snow's efforts,King
Cholera was defeated.He made great(10) _________(contribute)
to science.
leaving
infection
where
polluted
more likely
drinking
that
to
an
contributions
As a senior high school student,what can you learn from John Snow
John Snow
determination
creative
spirit
serious
attitude
critical
thinking
strong desire
to explore
*Choose one student to be the host and another to be a
famous scientist.
*Other group members are reporters.
*Perform your group work in the front.
Group work
press conference (记者招待会)
The host may conduct the conference in this way:
* Good morning/afternoon, everyone/ladies and gentleman.
* We are here today to...
* We are pleased to welcome...
* Well, it has been a wonderful morning/afternoon...I am sure everyone enjoyed it very much. I personally had a fun time.
* The conference is over and I wish you happiness in the coming days. Thank you!
...
The reporters may ask questions like these:
1.What kind of qualities has helped you succeed
2.Will you stop doing research
3.What other contributions do you hope to make？
4.What suggestions will you give to young people
5.……
Write an essay about a scientist you admire.
Contents:
1.Who is he/she
2.His /Her achievements.
3.Why do you admire him/her
THANK YOU

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