课件32张PPT。Unit 1 Great ScientistsWarming up and readingXiong ZhengrongArchimedesHe lived in Ancient GreeceHe discovered that objects in water are lifted up by a force.This theory helped him solve the problem raised by the king.He once said, “give me a place to stand on, and I can move the earth.”Warming uplight bulbCharles DarwinHe was born in 1808, in Britain.He wrote a famous book which changed the way we think about our lives.At that time people thought all living things were perfect, so would never need to change.He put forward his theory that animals and plants developed as the environment changed.4. Who invented the first steam engine?
Thomas Newcomen
(1663-1729) British5. Who discovered radium?
Marie Curie (1867-1934)
Polish and French, won two Nobel Prizes
Leonardo da Vinci
(1452-1519) Italian artistZhang Heng (78-139) Chinese, invented seismographStephen Hawking (1942--) British, a physicistWhat do you think when you see these words?How about Cholera? AIDSTB(肺结核)bird-fluSARSSpread from one person to another. So it is an infectious Disease.infect/affect peoplebacteria of cholera It infects people’s intestines(肠道), causing
diarrhoea(腹泻), vomiting(呕吐) and
dehydration(脱水)
Many deaths in African countries in 2005
and even now
Who can help us out of the trouble?
Who can ease the pain?Scientists & doctorsJohn Snow
( 1813~ 1858)
Englishman Cholera
defeatReadingJohn Snow defeats “King Cholera”What’s the main idea of the passage?A John Snow was a well-known doctor in London.
B The cause of Cholera was polluted water.
C The source of all drinking water should be examined.
D How did John Snow collect, analyze data(数据) and find the cause of the disease and solved(解决) it .
SkimmingFind out the main idea (or topic sentence) of each paragraph:Para. 1Para. 2Para. 3Para. 4-5Para. 6Para. 7He needed to prove the second theory was correct.He got interested in two theories explaining…John Snow wanted to use his knowledge to solve cholera.He found supporting evidenceFinally “King Cholera” was defeatedHe found out that dirty water was the cause of choleraCareful readingParagraph 1:Who was John Snow?
2. What kind of disease was Cholera at that time?
3. In Snow’s opinion, how Cholera could be controlled?He was an famous doctor in London----so expert.
He was Queen Victoria’s personal physician.It was a deadly disease of its day. Neither its cause nor its cure was understood. He knew that Cholera could be controlled until its cause was found.Paragraph 2What were the two theories that possibly explained how Cholera killed people?The first suggested that cholera multiplied in the air. A cloud of dangerous gas floated in the air until it found its victims.The second suggested that people absorbed this disease into their bodies with its meals.Paragraph 31. Which theory did he think was right?
2. What did he find in particular street during the cholera in 1854?The second oneThe cholera outbreak was so severe that more than 500 people died in ten daysParagraph 4-5:How did he begin his investigation? And what did he find?First: He marked on the map the exact places where all the dead people had lived.20,21in Broad Street8,9 Cambridge Street16,17,38,40
in Broad Street7 Cambridge StreetIt seemed that _______ was to blamewaterSo next??next(para.5)John Snowlooked into_______________________
found _____________________________
told_______________________________The source of waterthe water came from a polluted river people to remove the handleSoon after the disease slowed downParagraph 6-7:what’s his supported evidence?
What’s the result that he announced?
What was his suggestion?A woman who had moved away form Brand Street delivered water from the pump to her house every day. She and her daughter died after drinking the water.The polluted water carried the virus.He suggested that the source of all the water supplies be examinedJohn Snow Defeats “King Cholera”The passage is written as a report of an experiment and there are 7 steps:1.Find a problem:(发现问题)
2.Make up a question:(形成研究主题)
3.Think of a method:(找出研究方法)
4.Collect results:(收集材料)
5.Analyse results:(分析材料)
6.Find supporting evidence:(找出支持论据)
7.Draw a conclusion:(得出结论)Steps of his researchFind a problem
Make up a question
Think of a method
Collect results
Analyse the results
Finding supporting
evidence
Make a conclusion
Cholera epidemic How did cholera kill people?Gather informationMark on the dead people on the map the dead peopleMany of the deaths were near the water pump.Two other deaths in another partCholera was spread by germs instead of a cloud of gas1. Who is the main character in the passage?
2. Who is he ?
3. When did he live?
4. Where did another cholera break out in 1854?
5. Why did so many people die? (because)
6. What was he determined to do?
7. What did he do then? (so)
8. What did he suggest?
9. What’s the result ? (Finally)
Writing workWriting work1. Who is the main character in the passage?John Snow He was a famous English doctor.3. When did he live?He lived in the 19th century.2. Who is he ?4. Where did another cholera break out in 1854?In 1854 a cholera broke out in London./ Another outbreak hit London in 1854.5. Why did so many people die?Because many people had drunk the dirty water from the pump.6. What was he determined to do?He was determined to find the cause of cholera in order to defeat it.8. What did he suggest?He suggested that the source of all water supply be examined and the water companies were instructed not to expose people to polluted water any more.7. What did he do then?He began to gather information.9. What’s the result ?“King Cholera” was defeated.
Can you retell the passage in your own words or put the answers to the 9 questions above into a passage in not more than 100 words. Use some conjunctions if necessary. John Snow was a famous English doctor in the 19th century. In 1854 another cholera broke out in London. So many people died because they had drunk the dirty water from the pump. John Snow wanted to find the cause of cholera in order to defeat it, so he began to gather information. He suggested that the source of all water supply be examined and the water companies were instructed not to expose people to polluted water any more.. Finally “King Cholera” was defeated.John Snow was a _______ doctor in London in
the ___ century. He wanted to find the ______ of
cholera in order to ______ it. In 1854 when a cholera ______ out, he began to gather information. He ______on a map where all the dead people had lived and he found that many people who had drunk the
dirty water from the ______ died. So he decided that
the polluted water carried cholera. He suggested that
the ______ of all water supply ___________ and
The water companies ______________ not to expose
people to polluted water. Finally, “King Cholera” was _______.famous19thcausedefeatbrokemarkedpumpsourcebe examinedwere instructeddefeatedRead the passage again and fill in the blanks: