(共26张PPT)
Unit 1
SCIENCE AND SCIENTISTS
U N I T
1
What disease can you think of when you look at these pictures
COVID-19
COVID-19: an infectious disease.
It was discovered in the human body in 2019.
The virus is generally characterised by fever, dry cough and gradually dyspnea(逐渐出现呼吸困难).
The virus was confirmed to be with the phenomenon of human transmission and have latent(潜在的) infection.
The disease had no specific treatment at that time, so it broke out in 2020 and swept the globe.
Do you know how to prove a new idea in scientific research
How many stages are needed to set out a scientific research
What order would you put them in
___ analyse the results
___ ask a question
___ draw a conclusion
___ collect data
___ find a problem
___ find supporting evidence
___ think of a method
①
③
④
⑤
⑥
②
⑦
P2 1
Possible answer
In the early 19th century, a similar infectious disease hit Europe.
Now, let's read a passage about it to see if the order you decided was correct.
Read the title and predict.
John Snow Defeats “King Cholera”
Who
How
What
Main idea: The text is mainly about ____________ and ______ he defeat ________________
John Snow
how
King Cholera
Read and finish the tasks as quickly as possible.
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's the results and significance of John Snow's work
Read the passage quickly and match the main idea of each part.
Para1
Para 2
Para 4
Para 5
John Snow desired to destroy cholera.
John Snow decided to prove the second theory.
Snow began his study by marking on the map
and the process.
Truth of the infection of cholera
Snow's contributions
Para 3
Read the passage quickly and get the main idea of each paragraph.
Skimming: main idea of each paragraph
Para1
Para 2
Para 4
Para 5
Para 3
Task1. Read the 1st paragraph quickly and fill in the mind map.
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
Read paras. 2-3 again and complete the chart below.
Task 2
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 3
P3 4
multiple deaths
happened here.
No death happened here.
The water from the pump
was to blame.
Public house
Clue: free beer from public house
Result:
The water came from the river which had been polluted by the dirty water from London.
Task 3
Read paras. 2-3 to see if the order you decided was correct and complete the table below.
Order Stage Key words or sentences
1 Find a problem
2 Ask a question
3 think of a method
4 collect data
5 analyse the results
6 find supporting evidence
7 draw a conclusion
Two contradictory theories
P2 2
Check your answers.
find a problem
ask a question
think of a method
collect data
analyse the results
find supporting evidence
draw a conclusion
_____ a conclusion
________a method
_______ data
_______the results
____ supporting evidence
______a question
_____a problem
Find
Ask
Think of
Collect
Analyse
Find
Draw
k
Fill in the blanks and review the 7 stages.
7 stages of
a scientific research
Task4. Read Para.4 and 5 carefully to answer the four questions.
1. What caused the outbreak of cholera in London in 1854
2. Was cholera destroyed completely
3. Why was John Snow considered the father of modern epidemiology
4. How can we prevent cholera
1. What caused the outbreak of cholera in London in 1854
The water which came from the River Thames and had been infected by waste.
Para. 4:
The truth was that the water from the Broad Street pump had been infected by waste. … Some companies sold water from the River Thames that was polluted by raw waste.
Task4. Read Para.4 and 5 carefully to answer the four questions.
2. Was cholera destroyed completely
No.
Para. 5:
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. …
Task4. Read Para.4 and 5 carefully to answer the four questions.
3. Why was John Snow considered the father of modern epidemiology
1. He helped people know how to prevent cholera .
2. He transformed the way scientists study diseases in use of map and statistics.
Para. 5:
… 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.
n. 统计数字
Task4. Read Para.4 and 5 carefully to answer the four questions.
4. How can we prevent cholera
By drinking pure or boiled water.
Para. 4:
The truth was that the water from the Broad Street pump had been infected by waste. … The people who drank this water were much more likely to get cholera than those who drank pure or boiled water.
a.干净的
Task4. Read Para.4 and 5 carefully to answer the four questions.
1. Q: What ______________________________
A: Snow thought that cholera was caused by
germs in food or water.
2. Q: Why ________________________________
______________________
A: Snow had the handle from 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.
Task 7
What questions would you ask to get the following answers
did Snow think cholera was caused
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.
P3 5
Find a problem
Millions of people died from _______, but no one knew how to ________ or _______ it.
Ask a question
Theory 1: Cholera was caused by ________.
Theory2 : Cholera was caused by _____________
_____________________
Think of a method
Snow subscribed to the _________ theory. He began
to ____________.
Collect data
Snow investigated the two particular streets where ___
_______________
______________. He ____________ _____________ _______ where all those who died had lived.
Analyse the results
There were multiple deaths _____________
__________________________. Some households had no deaths because they drank free beer. Snow suspected that ______ __________________ ______________.
Find supporting evidence
A woman and her daughter died of cholera though they had moved away, because they ______________
_______________________________________.
Draw a conclusion
_____________________________________________.
cholera
prevent
treat
bad air
an infection from
germs in food or water
second
investigate
the
cholera outbreak
was very severe
marked on a
map the exact
places
near the water
pump in Broad
Street
the
water pump was to
blame
had the water delivered to their house every day
The pump water carried cholera germs
Complete the graphic organizer and then retell retell how John Snow defeated “King Cholera” according to it.
In our daily life, in order not to
get infected with the infectious disease,
such as cholera, AIDS, SARS,
what should we do?
Wash hands often
choose fresh sea food
Keep the kitchen clean
deal with rubbish properly.
Drink boiled water
Don't forget to wear a mask when you go out.
Discussion: Critical Thinking
Homework:
Read the passage and review the words and expressions in it.
Retell how John Snow defeated cholera.
Thanks