资源简介

(共27张PPT)
Unit 1
Science and Scientists
Reading and Thinking
Learning Objectives
1.To get information about John Snow, Cholera and how John Snow defeated cholera
2.To summarize stages of scientific research by analyzing how John Snow defeated cholera
3.To talk about the significance and contribution of John’s work
biology
medicine
agriculture
geology
space engineering
science
Latin: “knowledge”
Lead-in
What is science
“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
Science can be defined as the process of observing and __________ the world around us. Scientists aim to get __________ through a deciplined set of steps called scientific method.
questioning
knowledge
Lead-in
What is science
analyze the results
ask a question
collect data
think of a method
find a problem
find supporting evidence
draw a conclusion
Put the seven research stages in order.
Lead-in
John Snow (1813---1858)
John Snow was born in York on March 15th, 1813, the oldest of nine children.
Pre-reading
John Snow Defeats “King Cholera”
Who
How
What
1. Who is John Snow
2. What is King Cholera
3. How did John Snow defeat
King Cholera
The Story of Colera
Watch the video & answer 3 questions
① What’s wrong with the boy’s father
② How is the disease spread
③ What are the symptoms (症状) of Cholera？
How is the disease spread
polluted water
flies
unwashed hands
Pre-reading
Pre-reading
What are the symptoms (症状)of Cholera？
diarrhea
severe vomiting
dehydration
How did John Snow defeat King Cholera
Important phrases
lose one’s desire to do 失去做某事的欲望
once and for all 最终地;彻底地
in general 总而言之，一般来说
two contradictory theories 两种截然不同的理论
an infection from germ 细菌感染
subscribe to 同意;赞同
mark ... on a map 把……标记在地图上
deliver to 交付；传达；运输
in one’s track 在...的轨道上
pure or boiled water 纯浄水或开水
through sb’s tireless efforts 通过某人不懈的努力
the threat of ... ......的威胁
a substantial decrease 急剧下降
Important phrases
While-reading
Read the whole text quickly and match the main ideas.
Para. 1
Para. 4
Para. 5
Para. 3
Para. 2
John Snow desired to destroy cholera.
John Snow decided to prove the second theory.
Snow began his study by marking on the map.
Truth of the infection of cholera.
Snow’s contributions.
Para.1
Cholera
It's one of ________________________ in the world, because it causes ________________________________________.
_______________________(when), an outbreak of cholera hit _______ milions of people ______________________.
However, he had a desire to __________________ once and for all.
Snow
He rose to become _________________ , and even _______________ Queen Victoria when she gave birth..
Snow became ________ because no one knew _________________.
the most feared diseases
severe diarrhoea, dehydration and even death
In the early 19th century
Europe
died from the disease
“King Cholera”
frustrated
how to prevent or
treat cholera
a famous doctor
attended to
destroy cholera
While-reading
What does “ King ” imply in the title
The name of cholera
The causes of cholera
Cholera spread fast
Cholera is powerful and hard to cure
Para.1
While-reading
Para.2
1.What are the two theories Which theory did John Snow think was reasonable
2.What did John Snow ready to do when another outbreak hit London in 1854
Stage 1 Find a problem
While-reading
Stage 2 Ask a question
Why did so many people die in these 2 streets
Para.3
Stage 3 Think of a method
While-reading
Para.3
While-reading
1. Which houses had multiple deaths in Broad Street
What information did he get from the map
Stage 4 Collect data
Multiple deaths near ___________
water pump
2.Which houses had no deaths
Stage 5 Analyze the results
Para.3
A map of Broad Street
Broad Street
Many deaths happened here.
No death happened here.
Snow suspected that the water pump was to blame.
Pub
While-reading
Stage 6 Find supporting evidence
Para.3
While-reading
Para.3
Stage 7 Draw a conclusion
While-reading
Did his conclusion prove to be right
1. Find a problem
John Snow’s hypothesis(猜想)
2. Ask a question
3. Think of a method
4. collect data
5. analyse results
6. Find supporting evidence
7. draw a conclusion
Stages of doing research
It was believed that cholera was caused by bad ____ or germs in____________.
A
Snow ____________ the places where the people who _______ had lived.
B
Many deaths occurred near the _____________
in Broad Street.
Some people _________
drunk the water from the pump, and lived.
A woman and her daughter died in another part of London after
___________________.
The pump water carried ______________
The ________ of the pump was removed.
theories
process
air
food or water
died
marked on the map
water pump
hadn’t
drinking the pump water
cholera germs
handle
Solution
Conclusion
evidence
Read Para. 2-3 again and complete the chart below.
C
D
E
conclusion evidence process solution theories
Para.4
Read for the truth
What caused the outbreak of cholera in London
A. Bad air B. Water infected by raw waste
C. Polluted air D. Water polluted by the air
What can we learn from paragraph 4
A. The water from the Broad Street pump was safe to drink.
B. There is no connection between cholera and water company.
C. Boiled water was safer than pure water.
D. Water companies may be the reason for other cases of cholera.
Para.5
While-reading
What contributions did John Snow make
professional
hard-working
a questioning mind
rigorous
innovative
determined
What qualities do you think the Jhon has
Post-reading
Post-reading
Was cholera destroyed completely
No.
What can we do to prevent cholera
Drink boiled water.
Remember to wear a mask when going out.
Wash your hands often.
Cook raw food thoroughly.
Deal with rubbish timely and properly.
Thank you

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