人教版（2019）选择性必修 第二册Unit 1 Science and Scientists Reading and Thinking课件(共19张PPT)

(共19张PPT)
https://www./
1. where do you think this photo was taken
2. What are the students doing in the photo
It may be taken in a chemistry laboratory.
Two girl students are conducting an experiment.
Opening page
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 & Leopold Infeld
提出新的问题，发现新的可能，从新的角度审视已存在的问题，这些需要创造性的想象力，并标志着科学的真正进步。
―阿尔伯特 爱因斯坦
利奥波德 英费尔德
What qualities did Einstein and Infeld think a scientist should have
Imagination, creativity, raising questions and new possibilities, and looking at old problems from a new angle.
UNIT 1 SCIENCE AND SCIENTISTS
Reading and Thinking:
Understand the questioning mind
Lead-in
What is the disease mentioned in the video
Covid-19
④
Besides COVID-19, what other kinds of epidemics （流行病）do you know
bird-flu（禽流感）
malaria [m leri ]（疟疾）
cholera[k l r ]
（霍乱）
Ebola [ b l ] (埃博拉)
①
②
③
Who Helped Defeat Malaria
Draw a conclusion得出结论
Collect data收集资料
Ask a question提出假设
Find a problem发现问题
Analyse the results分析结果
Find supporting evidence寻找证据
Think of a method思考方法
Tu Youyou followed the scientific stages to find out the cure for malaria. Can you put them in the right order
Did he / she follow the same stages as Tu Youyou
Who Defeated Cholera
John Snow Defeats “King Cholera”
Who
How
What
Main idea: The text is mainly about _________and ______ he defeats ___________
John Snow
how
King Cholera
scientific research

Activity 1 : Read the title and predict——What will be talked about
Activity 2: Fast reading——Read the whole passage quickly and match the main idea
Para. 1
Paras. 2-3
Para. 4
Para. 5
◆ How did John Snow defeat King Cholera
◆ What's the truth of King Cholera
◆ What is King Cholera
Who is John Snow
◆ What are the contributions and significance of John Snow's work
Cholera
What It's one of ________________________ in the world, because it causes .
When ___________________________
Where _________
What’s the result ___________________________________________
the most feared diseases
severe diarrhoea, dehydration and even death
In the early 19th century
Europe
Millions of people died from the disease
John Snow
Who A doctor who even attend to when she gave birth.
What He had a desire to ________________ once and for all.
British
Queen Victoria
destroy cholera
Activity 3: Careful reading——Read for details.
Find the problem
Research background
Though being famous, he was still devoted to defeating “King Cholera”
Para.1
What were the two theories and which did John Snow agree with
Two contradictory theories
Theory one:
caused by ________
Theory two:
caused by _______
bad air
germs
Snow subscribed to the second theory.

Two contradictory theories
Find a problem→Ask a question
He needed proof .
Para.2
beer pub
Note: ——1death PH: public house 30,31,…: numbers of houses
water pump
7
Para.3
Think of a method→Collect data
1. What method did Snow use
2. What did he find on the map What did he do to deal with it
A map of Broad Street
Para.3
Analyze the results→Find supporting evidence
Snow began by marking on a map the exact places where all those who died had lived. There were multiple deaths near the water pump in Broad Street (especially house numbers 16, 37, 38, and 40). However, some households (such as 20 and 21 Broad Street, and 8 and 9 Cambridge8 Street) had had no deaths. 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. Snow suspected that the water pump was to blame. What is more, in another part of London, a woman and her daughter had died of cholera after moving away from Broad Street. It seemed that the woman liked the water from the pump so much that she had it delivered to her house every day. …
multiple
However
no deaths
the water pump was to blame
Para.3
Draw a conclusion
As a result of this evidence, John Snow was able to announce that the pump water carried cholera germs. Accordingly, he had the handle of the pump removed so that it could not be used. Through this intervention, the disease was stopped in its tracks.
announce
Pump water carried the cholera germs.
Remove the handle of the pump
The disease was stopped
Read para. 2-3 again and complete the chart below.
A: It was believed that cholera was caused by bad ___ or germs in ___________.
B: Snow ________
_______ the places where the people who ____ had lived.
C:
◆ 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 _____________________.
D: The pump water carried
_____________.
E: The ______ of the pump was removed.
Match the following headers with the letters from the chart above. Write A-E in the blanks.
1. conclusion 2. evidence 3. process 4. solution 5. theories
_________ _______ ______ ______ ______
air
food or water
marked on
a map
died
water pump
hadn't
drinking water from the pump
cholera germs
handle
D
C
B
E
A
conclusion
evidence
process
solution
theories
P3 4
Para 2-3 How
The truth was that the water from the Broad Street pump had been infected by waste. Moreover, Snow was later able to show a link between other cases of cholera and the different water companies in London. Some companies sold water from the River Thames that was polluted by raw waste. The people who drank this water were much more likely to get cholera than those who drank pure or boiled water.
1.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
2.Ask questions P3 5
Para.4
polluted by raw waste
infected by waste
1. Q: What ________________________________________
A: Snow thought that cholera was caused by germs in food or water.
2. Q: Why ________________________________________________
A: Snow had the handle of the pump removed so that it could not be used.
3. Q: How ______________________________________
A: The cholera threat was defeated thanks to the work of John Snow.
caused cholera according to Snow
did Snow have the handle of the pump removed
was the cholera threat defeated
Ask questions
One way to approach a reading passage is to ask questions about it. Asking questions can help you understand the content. It can also help you think more deeply about the topic.
Through Snow’s tireless efforts, water companies began to sell clean water and the threat of cholera around the world saw a substantial decrease. However, cholera is still a problem. Each year, millions of people around the world get cholera and many die from it. Fortunately, we now know how to prevent cholera, thanks to the work of John Snow. Moreover, in his use of maps and statistics, Snow transformed the way scientists study diseases. For this reason, Snow is considered the father of modern epidemiology.
What contributions did John Snow make
Para.5
Water companies began to sell clean water.
The threat of cholera around the world decreased.
He helped people know how to prevent cholera.
Snow transformed the way scientists study diseases.
The Father of Modern Epidemiology(流行病学)
What was the most important tool Snow used to defeat cholera
Activity 4: Discussion——make a comparison
cholera covid-19
methods of collecting data marking on a map
measures taken removed the handle of the pump sell clean water ..........
P3 6
cholera covid-19
map
methods of collecting data
nationwide color-based(基于颜色的)tracking system
database
cholera covid-19
messures taken removed the handle of the pump sell clean water ..........
fill in online form including ID card number, travel history and health conditions , such as fever or cough
have a quarantine
aeriel drones with disinfectant and loudspeaker
wear a mask
robots to avoid human-to-human transmission
scan the QR code ...
How to protect yourself from infectious diseases