Transcript Great scientists Unit 1

Unit 1
Great
scientists
Warming up
Do you know any scientists?
•The following is a quiz and let’s find out
who knows the most.
Let’s have a
competition!
Warming up
1.Which scientist discovered that objects in water
are lifted up by a force that helps them float?
A. Charles Darwin
B. Archimedes
C. Thomas Edison
2. Who wrote a book explaining how animals and
plants developed as the environment changed?
A. Marie Curie
B. Gregor Mendel C. Charles Darwin
3.Who invented the first steam engine?
A. Thomas Newcomen B. Archimedes
C. Thomas Edison
4. Who used peas to show how physical
characteristics are passed from parents to
their children.
A. Thomas Edison
B. Gregor Mendel C. Archimedes
5. Who discovered radium?
A. Marie Curie
B. Zhang Heng
C. Newton
6.Who invented the way of giving electricity to
everybody in large cities?
A. Stephen Hawking
B. Archimedes
C. Thomas Edison
7.Who was the painter that studied dead bodies
to improve his painting of people?
A. Gregor Mendel
B. Leonardo da Vinci C. Marie Curie
8. Who invented a lamp to keep miners safe
underground?
A. Sir Humphry Davy B. Thomas Newcomen C. Faraday
9. Who invented the earliest instrument to tell
people where earthquakes happened?
A. Charles Darwin B. Zhang Heng
C. Watt
10.Who put forward a theory about black holes?
A. Stephen Hawking B. Archimedes
C. Copernicus
What makes a
scientist successful?
strongwilled
talented
positive
bright
similarities
careful
strict
What impress you most in 2003?
What impress
you most in 2003?
infectious
What other infectious diseases do you know?
For example: When you eat some seafood……
You feel……
Maybe you have
Cholera
got ________.
infectious diseases :
• They can be spread to other people.
• They have an unknown cause.
• They are difficult to cure.
• They need public health care to solve
them.
Cholera:
•
It begins in the stomach and a severe
case can lead to death without immediate
treatment.
• And the victims died very quickly from a
loss of liquid after severe vomiting(呕吐)
and diarrhoea(腹泻).
Skimming:
:
Who was the great scientist in the
passage and what was the deadly
disease of its day?
•John Snow
•cholera
Read and answer:
Paragraph 1:
1 Why couldn’t the cholera be under
control at first?
Neither its cause, not its cure was
understood.
 True or false:
T
1. John Snow was glad to help ordinary
people.
2. John Snow thought cholera would
never be controlled.
F
Paragraph 2
 What’s the two theories?
 Which one is more reasonable?
Paragraph 3&4
John Snow finally proved the
theory he believed by ________.
A. gathering information with the
help of a map
B. looking into the source of the
water for Broad Street and
Cambridge Street
C. separating those who suffered
cholera from those who didn’t
D. both A and B
E. both A and C
Paragraph 4
What valuable clue did he get about
the cause of the disease?
Many of the deaths…
…had no deaths.
What method did he use?
Public house
Many deaths
happened
here.
A map
of Broad
Street
No death happened here.
The water from the pump was to blame.
Paragraph 4
What might be the cause?
It seemed that the water was to
blame for cholera.
Paragraph 5
 When the cause was found, what
did John Snow tell the people do？
To remove the handle from the water pump
so it could not be used.
Careful Reading:
1.Where did the woman live and why did
she and her daughter die?
Away from Broad Street
They had drunk the water from the pump.
2.What did their deaths suggest?
The polluted water carried the virus
3.What measures did John Snow take to
prevent the disease from spreading?
..suggested that…be examined
…were instructed not to expose…to…
Read the passage and number these events in the order
that they happened.
2 John Snow began to test two theories.
1 An outbreak of cholera hit London in 1854.
4 John Snow marked the deaths on a map.
7 He announced that the water carried the disease.
3 John Snow investigated two streets where the
outbreak was very severe.
8 King Cholera was defeated.
5 He found that most of the deaths were near a water
pump.
6 He had the handle removed from the water pump.
Discussing
Stages in setting out a new scientific idea:
⑦ draw a conclusion
③ Think of a method
④ Collect results
② Make a question
① Find a problem
⑤ Analyse the results
⑥ Find supporting evidence
Homework:
1.Read the text and learn the new
words by heart.
2.Find more information about cholera
and John Snow on the Internet.