资源简介

(共22张PPT)
Unit 1
人教版2019选择性必修第二册
Science and Scientists
Reading and Thinking
John Snow Defeats “King Cholera”
What is the problem we are seeing
coughing
sneezing
fever
Observe: find a problem
Lead in
Activity1:Think like a scientist
They’re
sick
.
Ask a question
What brings this sickness
/How does this sickness spread
Lead in
Activity1:Think like a scientist
What’s our first question
Think of a method
Theory1: the air
An interview
A spot map
Theory2: food or water.
Lead in
Activity1:Think like a scientist
How can we find the answer
Collect data
What evidence will we collect
From interview
For the map
Lead in
Activity1:Think like a scientist
Find common point（共同点）
Pattern（规律）
Analyze the results&Conclude
What other evidences can we find
Conclusion:
The water foutain(饮水机）is the source.
Lead in
Activity1:Think like a scientist
Pre-reading
Discuss the following stages of scientific research in groups and put them into correct order.
_____ analyze the results _____ ask a question
_____ Draw a conclusion _____ collect data
_____ Find a problem _____ Think of a method
_____ find supporting evidence
Activity2:Ordering the stages
John Snow Defeats King Cholera
What will be talked about from the title
Who
How
What
What does “ King ” imply in the title
Pre-reading
Activity3:Title Prediction
Let’s get more details
While-reading
Who is John Snow
What is the“King Cholera”
find a problem
What caused Cholera
While-reading
Para1
Careful-reading
Two theories
ask a question
was the cholera outbreak so severe in two particular streets
So he needed to think of a method to prove his opinion.
Careful-reading
Why
Para2
A map of Broad Street-“Cholera Map”
What method did Snow use
1.Which houses had more than 4 deaths and which had no death in Broad Street
Multiple deaths happened here.
No death happened here.
analyze the results
think of a method
collect data
Careful-reading
Activity4:Cholera Map Analysis
2.What did Snow doubt He suspected the
was the problem.
water pump
Finding Evidence
Place:
Who:
Event:
In another part of London
A woman and her daughter
died of cholera because of drinking the water delivered from the pump
The pump water carried cholera germs.
The disease was stopped.
Draw a conclusion
Careful-reading
He
the handle of the pump.
removed
Para3
Order Stage Questions
1 Find a problem what caused Cholera
2 Ask a question Why was the cholera outbreak so severe in two particular streets
3 Think of a method what method did Snow use to study the problem
4 Collect data Which house numbers are related to the case
5 Analyse the results Why were there multiple deaths near the water pump
6 Find the supporting evidence What supporting evidence can prove the connection
7 Draw a conclusion What conclusion did John Snow draw based on the evidence about the pump water
While-reading
According to the Para4 and Para5 to finish the questions below.
Snow’s contribution:
Fortunately, we now know how to cholera, the work of John Snow. Moreover, in his use of maps and statistics, Snow the way scientists study diseases.
Snow’s achievement:
Snow is considered .
prevent
thanks to
transformed
the father of modern epidemiology
Careful-reading
Activity5:Text Gap-fill
What qualities do you think John Snow has t qualities do you think John Snow has
Post-reading
Activity6:Qualities of a Scientist
The School Detective Challenge
There has been a sudden outbreak of "Mystery Flu" at our school. Several students and teachers have reported symptoms(症状）like fever, headache, and stomach ache. The headmaster is very concerned and has asked our class, as scientific investigators(调查员）, to help find the source and stop the outbreak.
Group work:
Design a mini-investigation plan to tackle this problem.
Post-reading
Activity7 :The School Detective Challenge
Ai assistant’s tips
step1 Many students and teachers are sick.
step2 How is the flu spreading
step3 Interview sick students,check shared spaces /note where sick Ss were.
step4 Ask sick Ss( shared any items /were you sitting near... )
step5 Sick people spent time in crowed room/touched shared surfaces
step6 Ss sat next to the sick likely to get infected/touched the same desk...
scientific methods
scientific spirits
Questioning mind
Promote scientific progress
Criteria 3points(Great) 2points(kind of) 1point(needs practice)
Can you explain Snow’s investigation Yes Know the main idea Can’t
Can you use 5+new words Yes Recognize some words but can’t use Remember very few new words
Can you actively join in and share ideas Yes work in group but mostly quite Didn’t help the group’s task
Can you explain why Snow’s method worked Yes know it but can’t say why Can’t analyze
Evaluation sheet
Homework
1.Write a report based on the mini-investigation plan to the headmaster
and offer some suggestions to stop the outbreak.(about 100 words) .
2.(Optional Extension)
Use the internet or an AI tool to research one common method used in
modern epidemiology (like contact tracing or data modeling).
Thank you

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