Unit 1 Science and Scientists Reading and Thinking课件(共23张PPT，内镶嵌视频) 人教版(2019) 选择性必修第二册

(共23张PPT)
Unit 1 Science and Scientists
Reading and Thinking
John Snow Defeats “King Cholera”
In this class, you will
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
Learning Objectives

Are you familiar with these situations
Mask up
Nucleic acid tests
Online lessons
Lead in
coronavirus
infectious
Lead in
Besides coronavirus, what other kinds of epidemics(流行病) do you know
Lead in
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.
Skim the title and prediction
While-reading
John Snow desired to ________ cholera.
John Snow decided to prove __________ theory.
Snow began his study by ___________________.
________________ of the infection of cholera.
Find out the main idea of each paragraph.
Para. 1
Para. 2
Para. 3
Para. 4
The results and the _____________of Snow’s work.
Para. 5
What &Who
How
The truth
Results
destroy
the second
marking on a map
The truth
significance
While-reading
Read for the structure
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
_____
_______ when she give birth)
the most feared diseases
severe diarrhoea, dehydration, and even death
Britain
Millions
A famous _______ (who even attend to _____
doctor
Queen
Victoria
To destroy cholera once and for all.
While-reading
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.
While-reading
Read for Details (Para. 2)
bad air theory
germ theory
While-reading
Read for Details (Para. 2)
What method did John Snow use
find a problem
ask a question
think of a method
While-reading
Para3:How did he investigate the breakout
marking on a map
Multiple deaths near ___________
water pump
1. Which houses had more than 4 deaths and which had no death in Broad Street
What information did he get from the map
2.Why did some houses near the water pump have no death
These people worked in the pub and had been given free beer, and so had not drunk the water from the pump.
While-reading
Any other supporting proof
What result did he get from the analysis
Snow suspected that the_____________was to blame.
A woman and her daughter died in another part of London after drinking water from the pump.
John Snow was able to announce:
John Snow had the handle of the pump removed.
What measures did John Snow take
water pump
that the pump water carried cholera germs.
What is the truth
While-reading
Read for the stages.
Think of a method
Collect data
Analyse the results
Find supporting evidence
Draw a conclusion
Find a solution
Stages of doing research
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
While-reading
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)
He helped people know how to prevent cholera.
He transformed the way scientists study disease by using maps and statistics.
contribution
achievement
While-reading
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
While-reading
What makes John Snow a great scientist What are the common
qualities do great scientist have in common？
responsible
knowledgeable
brave/courageous
committed/devoted/dedicated
critical thinking
creative
questioning mind
passionate
curious
ambitious
determined...
Critical Thinking
Fill in the blanks according to the text.
In the early 19th century, an outbreak of cholera hit Europe, _______ (cause) millions of deaths. Seeing this, John Snow became frustrated because no one knew how _________ (prevent) or treat cholera. At that time, doctors had two theories to explain how cholera spread. One was that bad air caused the disease and another was that cholera was caused by germs in food or water. John discovered that in two particular street _____ cholera outbreak was ____ severe that over 500 people died in ten days. Through his serious ____________ (investigate), he found it was the pump water in Broad Street _______ resulted in the disease. Therefore, he had the handle of the pump ________ (remove) .
causing
to prevent
the
so
investigation
that
removed
Summary
It turned out that the water from the pump _______________ (infect) by waste. Through Snow's tireless efforts, water companies began to sell clean water, and the threat of cholera around the world saw ____ substantial decrease. Snow transformed the way ________________ scientists study diseases. For this reason, he is considered the father of modern epidemiology.
Fill in the blanks according to the text.
had been infected
that / in which
a
Summary
According to what we have learned, please write a short passage.
The title is “A person I admire”.
contents:
who, what, how, contributions
Homework
Thank you !