2. If you won ’ t be forgotten after death, either write things worth reading, or do things worth the writing. ------------- Benjamin Franklin Unit 16 Reading

3. PhysicsMedicineChemistryBiology Madame Curie radium ( 镭 ) radioactivity ( 放射 ) Isaac Newton gravity ( 重力 ) Florence Nightingale Louise Pasteur germs ( 细菌 ) Watson & Crick DNA Mendeleyev periodic table of elements ( 元素周期表 ) Charles Darwin evolution ( 进化 ) Carl Linnaeus naming plants Some scientists in the 18 th & 19 th centuries pie charts ( 圆形分格统计图表 ) Warming up: Do you know ?

5. What can you think of

6. (1706-1790)

7. Do you know about Franklin (1706-1790) He was born on Jan. 17, in Boston Massachusetts. He wasn’t very good at math when he was young. He had only less than 3 years of school education. He was curious and loved to learn about new things. He invented the lightning-rod ( 避雷针 ). He helped to found a new nation --- USA. He helped write the Declaration of Independence ( 独立宣言 ). He was an inventor, a writer, a scientist, a businessman and a world-famous statesman ( 政治家 ).

8. Listen, read, then decide Listen, read, then decide true or false true or false In 1752 scientists already knew what electricity was. In 1752 scientists already knew what electricity was. Franklin was helped by a friend to do the experiment. Franklin was helped by a friend to do the experiment. Franklin made the kite of silk because wet silk does not conduct electricity. Franklin made the kite of silk because wet silk does not conduct electricity. A condenser was used in the experiment to store electricity. A condenser was used in the experiment to store electricity. The key tied to the string was put into the door to stop the kite flying away. The key tied to the string was put into the door to stop the kite flying away. T F F T F Skimming:

9. Which ones are correct? Scanning:

10. Qs : Why did he do this experiment with a kite? Why did he make the kite of silk, not paper? Is this experiment dangerous? Why? What did this experiment prove? This proved that lightning and electricity are the same.

11. Franklin ’ s famous kite experiment purpose: what\do: when\do: what\ happened: things\ needed: steps: to prove lightning & electricity are the same built a strong kite in bad weather got charged, and felt electric shock a kite, a key, some bad weather, a condenser 1.fix a sharp piece of metal 2. fasten a key to the end of the long string 3. tie a silk ribbon to the string result: proved the idea Read & discuss:

12. Franklin ’ s kite experiment

13. 1.What did he do, after he had realized that he could use a kite to attract lightning? Having realized that he could use a kite to attract lightning, he decided to do an experiment. (After he had realized ------, he decided -------.) What did you do, after you had found no buses? Having found no buses, I decided to take a taxi.

14. 2. What will you have, if you tie the corners of the handkerchief to the points of the cross? Tie the corners of the handkerchief to the points of the cross, and you will have a nice strong kite. What will you say, if your friend will be late? Hurry up, and you will be on time. Hurry up, or you won’t be on time.

15. 3.What is the use of the silk ribbon? This ribbon will protect you from the electricity. It will prevent the electricity from hurting you. Why do you like to wear hats on summer days? A hat will protect us from the sun. A hat will prevent the sun from hurting us.

16. a kitewoodhandkerchief silk string Things needed to make a kite:

17. How to make the kite? Build…Tie…to … Add…to … Tie…to … First, fix… Second, fasten… Third, tie… Fourth, fly…

18. In order to prove that ______ are the same, Franklin built a strong _____. When the ____ came, he did the ____ by using his ____ and condenser. He found the string was ____ and he could feel a light but very clear ___. So he ___ a great deal of ___ in the condenser. This proved _____. To do the ___, ___ are needed: a __, a __, some___ and a condenser. The next _____ are very important. 1, fix a sharp piece of _____. 2, fasten a ____ to the end of ___. 3, tie a ____ to the long string.

19. TitleExperimenter ’ s name Purpose: Procedure : Results : Conclusion: (Kite) Experiment Report Homework: writing

20. Knowledge is power. -------- ( F. Bacon 培根 ) Knowledge is a treasure, but practice is the key to it. -------- ( Fuller 富勒 ) Genius is 1% inspiration and 99 % perspiration. ------- (T. Edison 爱迪生 )