课件51张PPT。Unit 1 Great Scientists What do you know about great scientists? Try the quiz on P1 and find out who knows the most.Marie Curie
Stephen Hawking
Leonardo da Vinci
Zhang Heng
Charles Darwin
Sir Humphry Davy
汉弗来.戴维爵士
Gregor Mendel
Archimedes 阿基米德
Thomas Edison
Thomas Newcomen1.Which scientist discovered that objects in water are lifted up by a force that helps them float?Archimedes (287-212 BC) an ancient Greek mathematician阿基米德 2.Who wrote a book explaining how animals and plants developed as the environment changed?Charles Darwin (1808-1882) British biologist
author of The Origin of Species 3.Who invented the first steam engine?Thomas Newcomen (1663-1729) British, improved the first steam pump and turned it into a steam engine for taking water out of mines in 1712. 纽科门 4.Who used peas to show how physical characteristics are passed from parents to their children?Gregor Mendel
(1822-1884) Czech (捷克人) botanist and geneticist孟德尔 5.Who discovered radium?Marie Curie (1867-1934) (Polish and French, won two Nobel Prizes)
a chemist and physicist6.Who invented the way of giving electricity to everybody in large cities?Thomas Edison (1847-1931)
an American inventor7.Who was the painter that studied dead bodies to improve his painting of people? Last SupperMona LisaLeonardo da Vinci 达芬奇
(1452-1519) Italian artist8.Who invented a lamp to keep miners safe underground?Sir Humphry Davy
汉弗来.戴维爵士
(1778-1829)British
an inventor and chemistMiner's Safety Lamp 9.Who invented the earliest instrument to tell people where earthquakes happened?Zhang Heng
(78-139) Chinese, invented seismograph10.Who put forward a theory about black holes?Stephen Hawking
(1942--) a British astronomer and physicistWhat impress you most in 2003?What other infectious diseases do you know?For example: When you eat some seafood……You feel……Maybe you have got ________.CholeraBacteria of choleraDo you know what kind of disease is cholera?It is a kind of terrible disease caused by drinking dirty water and it caused a lot of deaths in the old times and it was very difficult to defeat.water pumpJohn SnowDefeat"King Cholera"Study the titleAccording to the passage. please put the
7 stages in right order
Fast-readingMatch themWhat is the problem?The cholera was the most deadly disease
of its day. What caused cholera?Details Why was it deadly?Neither its cause, nor its cure was understood.make up a question: Which theory to believe in? idea 1idea 2Cholera multiplied in the air without reason.
A cloud of dangerous gas would float around
until it found its victims.People absorbed it with their meals.A map of Broad StreetWhat method did he use?Broad StreetMany deaths happened here.No death happened here.The water from the pump was to blame.water pumpanalyze the results: What happened to the pump water?The water was from the river
which had been polluted by
the dirty water from London.Find supporting evidence: What extra evidence did he find?two other deaths A woman and her daughter
who lived far away but drank
the water also died.
draw a conclusion with certaintyThe polluted water
carried the disease.Scientific Report by John SnowNobody knew the cause of the serious disease of choleraa strange cloud of gas found its victimspeople absorbed the disease with mealsCollect information from the cholera outbreak to prove which theory was correctComprehending He found the cause of cholera was the polluted waterIdea 2. Because the information showed that the dirty water carried choleraHe defeated cholera by examining the water supply and dealing with the polluted water Read the passage again and fill in the blanks:
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.doctorcause19thdefeatbrokemarkedpumpsourceexamineddealingWhat should we pay attention to in our daily
life in order not to get infected with cholera? Heal the food left overnightCook raw food thoroughlyWash hands oftenKeep away from flieschoose fresh sea foodKeep the kitchen cleanDispose rubbish properly.Drink boiled waterdiscussionStudy the poster first and then you please
design a poster, introducing Cholera to
people, and inform people of the ways to
keep away from getting infected with cholera.Team work1. Surf the internet to find out:
What should we pay attention to in our daily life to prevent ourselves from getting infected with all these infectious diseases?
2. Write down the important words and phrases in your exercise books.
3. Underline the difficult sentences that you cannot understand.HomeworkWho is John Snow? a famous doctor in London
—so expertWhat happened to them? 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
5oo deaths in 10 days in 1854 in London.
Unit 1 Great Scientists
(reading)Task 2: Read and Answer1 Why couldn’t the cholera be under control at first?
2 Which theory did John Snow believe in?
3 Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 Cambridge Street?
4. To prevent the cholera from spreading again, what did John Snow do?1 Why couldn’t the cholera be under control at first?
2 Which theory did John Snow believe in?
Neither its cause, nor its cure was understood.People absorbed cholera into their bodies with their meals.3.Why is there no death at No. 20 and 21 Broad Street as well as at No. 8 and 9 Cambridge Street?These families had not drunk the water from the Broad Street pump.4 To prevent the cholera from spreading again, what did John Snow do?
Suggested that the source of all water supplies be examined.
Suggested that new methods of dealing with polluted water be found.
Instructed the water companies not to expose people to the polluted water anymore.ComprehendingThe 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.Repeat if necessary:(必要时重新分析)
7.Draw a conclusion:(得出结论)Mind Map of the TextJohn Snow Defeats “King Cholera”Paragraph 1: Introduction of John Snow and Cholera
Paragraph 2: Two theories
Find a Problem:Make a question:Paragraph 3-5: Study of the breakout in 1854 What caused the cholera?
Which is right?Paragraph 3: Study of the breakout in 1854
Think of a method:
Collect the result:
Analyze the result:Paragraph 4: Study of the breakout in 1854
Paragraph 5: Study of the breakout in 1854
Analyze the result:Repeat if necessary:
Draw a conclusion:Test two theoriesMark the deathReason for death and no deathFind the resource of the waterFind more evidence.
Cholera was spread by germ
Polluted water carried choleraParagraph 6: Prevention of Cholera
John Snow defeats King CholeraNobody knew the cause of the serious disease of choleraa strange cloud of gas found its victimspeople absorbed the disease with mealsCollect information from the cholera outbreak to prove which theory was correctHe found the cause of cholera was the polluted waterIdea 2. Because the information showed that the dirty water carried choleraHe defeated cholera by examining the water supply and dealing with the polluted water Discussion: Discuss the following questions in groups of four.1.2.3.Cholera was a 19th century disease. What disease do you think is similar to cholera today?John Snow believed Idea 2 was right. How did he finally prove it?Do you think John Snow would have solved this problem with- out the map? Give a reason. Two diseases, which are similar today, are SARS and AIDS because they are both very serious, have an unknown cause and public health care to solve them. John Snow finally proved his idea because he found an outbreak that was clearly related to cholera, collected information and was able to tie cases outside the area to the polluted water.Keys1.2. No. The map helped John Snow organise his ideas. He was able to identify those households that had had many deaths and check their water-drinking habits. He identified those houses that had had no deaths and surveyed their drinking habits. The evidence clearly pointed to the polluted water being the cause.3.1.Finish the exercises on your book.
2.Review HomeworkThank you!