人教版必修五Unit-1《Great-scientists-Reading》ppt课件.ppt

1、Reading,Warming Up,There are some great scientific achievements that have changed the world. Can you name some of them? What kind of role do they play in the field of science ? Do these achievements have anything in common? Match the inventions with their inventors below before you answer all these

2、questions.,Alexander Bell electricity Thomas Edison the First telephone Laite Brothers the electric Lamp Madame Curie black holes in Universe Franklin Theory of Gravity Steven Hawking the First Plane Elbert Einstein Radium Isaac Newton the Theory of Relativity,Quiz Questions (P1) 1. Archimedes, Anci

3、ent Greek (287- 212 BC), a mathematician. He found that if you put an object into water the water pushes the object up. It rises and partly floats. The force of the water pushing it up is the same as the weight of the object.,阿基米德 (Archimedes),2. Charles Darwin, Britain (1808 - 1882) The Origin of S

4、pecies was published in 1859. It explained how plants and animals had changed over time to fit in with a changing environment. At the time it was published it was very controversial. Many people believed the Bible when it said that God made the first two people (Adam and Eve) and that all other peop

5、le came from these two.,Charles Darwin,Darwins book showed that people had developed from apes instead. So this caused a lot of argument between religious and scientific people. However Darwins idea became very influential and is still accepted today.,3. Thomas Newcomen, British (1663-1729) He impro

6、ved the first steam pump built by Thomas Savery in 1698 and turned it into a steam engine for taking water out of mines in 1712. James Watt improved it still further in the 1770s turning it into the first modern steam engine used on the railways.,4. Gregor Mendel, Czech (1822- 1884) He grew pea plan

7、ts and developed ideas on heredity(遗传学) and inherited (继承,承传) characteristics. He concentrated (集中精力) on cross-fertilizing (施肥) pea plants and analyzing the results. Between1856- 1863 he grew 28,000 pea plants.,Gregor Mendel,He examined seven kinds of seed and plant characteristics and developed som

8、e laws of inheritance (承传的规则). The first is that inheritance factors do not combine but are passed to the next generation intact (完整的). Second, he found that each partner gives half the inherited factors to the young.,Third, some of these factors show up in the offspring (子孙) (and so are dominant显性的

9、). The other factors are masked by the dominant ones (and so are recessive隐性的).,5. Marie Curie, Polish and French (1867-1934) She was born in Poland and came to study in France in 1891 and she lived there for the rest of her life. In 1898 she discovered radium. She received two Nobel prizes, one ( w

10、ith Pierre Curie ) for physics (1903) and one for chemistry (1911).,Marie Curie,She is the only person to have been so honored. On the death of her husband she took over his job at the Sorbonne in Paris. Her work on radioactivity and the discovery of radium meant that she began a new scientific area

11、 of research.,She was the first woman to receive a Nobel Prize and the first woman to teach at the Sorbonne (索邦神学院:巴 黎大学前身).,6. Thomas Edison, American (1847- 1931) He was already an inventor of other electrical devices ( phonograph电唱机, electric light bulb) when in 1882 he designed a system for prov

12、iding New York with electricity from a central power station. This was a tremendous achievement, which had previously been thought impossible.,Thomas Edison,7. Leonardo da Vinci, Italian (1452- 1519) He was a famous artist whose skill for showing human skin tones made his paintings seem to come aliv

13、e. He used to study dead people in order to make his paintings as accurate as possible.,Leonardo da Vinci,Some of his famous paintings include The Adoration of the Magi and the The Last Supper. Later in his life he lived in France where he designed a submarine and a flying machine.,8. Sir Humphry Da

14、vy, British (1778- 1829) He did research into different gases and discovered the medicinal value of nitrous(麻醉) oxide(氧化物) (or laughing gas) as an anaesthetic(麻醉剂). In 1815 he developed a safety lamp for miners.,Humphry Davy,Previously there had been many accidents when candles on the miners helmets

15、 had exploded when it came into contact with underground gas from the coal the miners were digging. The safety helmet made working underground very much safer.,9. Zhang Heng, Chinese (78- 139) He invented the first seismograph(测震 仪、地震仪) to indicate in the direction of an earthquake. It was in the sh

16、ape of a cylinder(圆筒形) with eight dragonheads round the top, each with a ball in its mouth.,张衡,地动仪,Around the bottom were eight frogs directly under a dragons head. When an earthquake occurred, a ball fell out of the dragons mouth, making a noise.,10. Stephen Hawking, British (1942-) He has worked i

17、n astronomy and studied black holes in space. He has shown that black holes do not only absorb everything around them but, from time to time, throw out matter as well.,Stephen Hawking,This may mark the beginning of new galaxies. This is an advance on the old theory which said that black holes eat” e

18、verything they come across.,Leading in,Supply the following words with detail. John Snow Cholera,John Snow,(1813-1858),John Snow was born in York on March 15th, 1813, the oldest of nine children.,York,London,His father worked as a laborer. While poor, his parents were determined to give their childr

19、en whatever educational opportunities they could afford. He was educated at a private school in his native city until the age of fourteen, when he was apprenticed(当学徒) to William Hardcastle, a surgeon(外科医生) living at Newcastle-on-Tyne.,After serving for a short time as a surgeon and unqualified assi

20、stant during the cholera epidemic of 1831-1982, he became in October 1836 a student at the Hunterian School of medicine in Great Windmill Street, London. He began to attend the medical practice at the Westminster Hospital in the following October.,He graduated M.D. of the University of London on 20

21、Dec. 1844, and in 1850 he was admitted a licentiate of the Royal College of Physicians.,He designed a chloroform inhaler(氯仿吸入器), described in his book, On Chloroform and other Anesthetics, published in 1858.,Dr. Snow was also a prominent anesthesiologist(麻醉师),What else was he famous for?,What is Cho

22、lera?,Cholera is the illness caused by a bacterium called Vibria cholerae. It infects peoples intestines(肠), causing diarrhea(腹泻), vomiting and leg cramps.,The most common cause of cholera is by someone eating food or drinking water that has been contaminated with the bacteria.,After a disaster, thi

23、s 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.,Cholera can be mild or even without symptoms, a severe case can lead to de

24、ath without immediate treatment. The diarrhea and vomiting brought on by the infection quickly leaves the body without enough fluid. The following dehydration(脱水) and shock can kill a person within hours.,Look at the picture, the title and the map, guess what is the content of the text? Then skim it

25、 quickly to see if you were right.,When we want to solve some problem. First we should find the problem, do some research on it, prove your finding, and then make a conclusion. This is a scientific and objective way of researching.,1. What order would you put the seven in?,Pre-reading,Infectious dis

26、eases can be spread to other people. They have an unknown cause and need public health care to solve them.,2. What do you know about infectious diseases?,Repel (回避) may be exposed to an infectious diseases, so may animals, such as bird flu. AIDS, SARS are infectious diseases. Infectious diseases are

27、 difficult to cure.,Cholera is the illness caused by a bacterium called Varian cholera. If infects peoples intestines(肠胃), causing diarrhea, vomiting and leg cramps(腹痛).,3. What do you know about cholera?,The most common cause of cholera is by someone eating food or drinking water that has been cont

28、aminated(污染) with the bacteria.,Cholera can be mild(不严重的) or even without symptoms(症状), but a severe case can lead to death without immediately treatment.,First we should find the problem. Then, think of a method. We should collect as much information as possible.,4. Do you know how to prove a new i

29、dea in scientific research?,Analyzing results is the most important stage. Before we make a conclusion, it is necessary for us to repeat some stages or processes.,Germany,Great Britain,Death of first cholera case in London during the 1848-49 epidemic,London,Previous cholera epidemic in Great Britain

30、 in 1831-32,The spread of cholera,“I found that nearly all the deaths had taken place within a short distance of the pump.”,Snow on cholera,Snow suspected contamination of pump water.,Small, white, flocculent particles,Find a problem,The _ of cholera,causes,Comprehending,Theory two: When people _ ch

31、olera into their bodies with meals, their bodies were attacked and soon they died.,Theory one: Cholera _ in the air and dangerous gas floated around until it found its victims.,Make up a question,multiplied,absorbed,Think of a method,To _ the second theory was correct.,prove,Collect results,Some inf

32、ormation was _ on how many people died and where they got water.,Analyse results,_the water to see if that is the cause of the illness.,gathered,Analyse,Repeat if necessary,With extra _ , it was announced definitely that _ water carried cholera.,Make a conclusion,Polluted water spread cholera. “King

33、 Cholera” was _ .,evidence,polluted,defeated,Make a conclusion Think of a method Collect results Make up a question Find a problem Analyse the results Repeat if necessary,Read the text carefully and choose the best answers. 1. Whats the purpose of the text? A. To show us how difficult it was to find

34、 a cure for cholera. B. To tell us how John Snow found the cause of cholera and the cure for it. C. To show us how difficult it was to carry out experiments at that time. D. To tell us the way cholera spread and how serious it was.,B,2. Which of the following is TRUE according to the text? A. John S

35、now became famous after cholera hit England in the 19th century. B. John Snow began to collect information long before cholera hit England in the 19th century. C. The mother and her daughter mentioned in the text both lived in Broad Street. D. John Snow felt unsure about the cause of cholera after h

36、e finished the map.,D,3. Why was cholera called “King Cholera” in the text? A. Because cholera caused many deaths. B. Because it got its name from Queen Victoria. C. Because cholera was the most deadly disease of its day. D. Because it was defeated with the help of the king.,C,What should you do if youre 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