课件25张PPT。Unit 1 Great ScientistsWhat 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
defeatWhat is cholera?
----a serious disease that causes sickness and sometimes death. It infects people‘s intestines(肠), causing diarrhea(腹泻), vomiting and leg cramps. It is caused by eating infected food or drinking infected water
After a disaster, this is a very real danger, since regular, clean water and food supplies are often unavailable. The disease can be spread even further by infected people using already dirty water sources to clean themselves or dispose of waste.
ReadingJohn 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 and find the cause of the disease and solved it .
SkimmingFind out the main idea (or topic sentence) of each paragraph:Para. 1Para. 2Para. 3Para. 4Para. 5Para. 6He 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.Polluted water carried the diseaseFinally “King Cholera” was defeatedHe found out that dirty water was the cause of choleraScientific Report by John SnowNobody knew the cause of the serious disease of cholera.Idea 1,… Idea 2, …Collect information from the cholera outbreak to prove which theory was correct.He found the cause of cholera was the polluted water.2. Because there was a connection between the drinking water and the deaths. John Snow was able to show that cholera could be defeated now that its cause was known .The
problemThe causeThe methodThe resultsIdea 1 or
2? Why ?
The
conclusion
John 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 gasPost readingRead the passage again and answer the following questions?1. Who is the main character in the passage?John Snow 2. Who is he ?He was a famous English doctor.3. When did he live?He lived in the 19th century.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.8. What did he suggest?He suggested that the source of all water supply be examined and new methods of dealing with polluted water be found.7. What did he do then?He began to gather information.6. What was he determined to do?He was determined to find the cause of cholera in order to defeat it.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.1. 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)
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 new methods of dealing with polluted water be found. 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
new methods of ________ with polluted water be
found. Finally, “King Cholera” was _______.well-known19thcausedefeatbrokemarkedpumpsourcebe examineddealingdefeatedRead the passage again and fill in the blanks:Retell the passage according to below:
John Snow was a well-known ____ 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 be _______ and new methods of ________ with polluted water be found. Finally, “King Cholera” was defeated.1. Cholera was 19th century disease, which two diseases are similar to cholera today ? Why ? SARS and AIDS. They are both very serious, have unknown cause and need public health care to solve them.Free Talk2.What should you do if you're travelling to a country that has a cholera outbreak? ■ Drink only water that you have boiled or treated with chlorine or iodine. Other safe drinks include tea or coffee made with boiled water and carbonated, bottled beverages with no ice.
■Eat only food that's been thoroughly cooked and is still hot, or fruit that you've peeled yourself.
■Avoid undercooked or raw fish and shellfish.
■Avoid raw salads and vegetables.
■Avoid food and drinks from street vendors.
■"Boil it, cook it, peel it, or forget it."