Unit 16 Scientist at work Reading

1. Unit 16 Scientist at work Reading By Gareth.Liu Gongguan Middle School

5. Benjamin Franklin(1706-1790) diplomat (外交官) Statesman/politician philosopher (哲学家) Inventor—the lightning rod scientist

6. READING: Franklin’s Famous Kite Experiment (Page 24)

7. Scanning Kite Experiment In June 1752 Franklin and his son To show that Lightning and electricity are the same. a kite, a key, some really bad weather and a condenser

8. What is mainly talked about in each paragraph? Match the topics with the paragraphs Para 1-3 Para 4-5 Para 6 The needed materialsand steps of the kite experiment The general description of the kite experiment Flying the kite and some tips

9. Reading Competition Rules: 1. Anyone who raises his/her hand can choose to answer the question by himself/herself, or ask the other group to answer the question. • 2. You can get one point for your group by answering a question correctly; if you are wrong, you’ll get nothing. If you choose the other group to answer the question and their answer is right, the point will be theirs. But if they are wrong, the point will be yours. • 3. The group getting the most points will be the winner.

10. Reading Para. 1---3 • Before Benjamin Franklin doing the experiment, what did he realize? • Where did he do the experiment? • Why did Franklin think that the string was getting charged?

11. A handkerchief of silk Frame (cross)---- two pieces of light wood A tail A long string A very sharp piece of metal A key A silk ribbon List all the materials that are needed to make such a kite.

12. Demonstration Draw a sketch(草图) of the kite which was used in the experiment according to the instruction and make some notes about the details of the kite on your sketch.

13. How to make Franklin’s kite? 5.fix a sharp piece of metal to the top of the longer stick two pieces of light wood frame 1.build the frame by making a small cross a handkerchief of silk 2.tie the corners to the points of the cross tail 4.tie a long string to the cross 3.add a tail to the frame strings 6.fasten a key to the end of the long string 7.tie a silk ribbon to the string above the key

14. ① Form a small cross with two pieces of light wood. ② Tie the corners of a handkerchiefto the points of the cross. ③ Adda tail to the frame. ④ Tie a long stringto the cross. ⑤ Fix a sharp piece of metalto the top of the longer stick of the cross. ⑥ Fastena keyto the end of the long string. ⑦ Tiea silk ribbonto the string. Steps to make the kite

15. Multiple choice • Franklin made the kite of silk because ______. • wet silk does not conduct electricity • silk kite flies high • silk kite will last longer in weather with rain and strong winds • silk kite is cheaper C. silk kite will last longer in weather with rain and strong winds

16. 2. Which is not stated but can be inferred from the text? • Franklin did the experiment with the kite. • Franklin’s experiment with electricity was dangerous. • Franklin failed the experiment again. • The experiment was conducted in bad weather. B. Franklin’s experiment with electricity was dangerous.

17. 3. Which of the following is in the correct order? ①The experiment proves that lightning and electricity are the same. ②The kite flew high in the rainy sky. ③He made a silk kite. ④Very sharp piece of metal was fixed. ⑤A key was fastened to the end of the string. ⑥ A ribbon was tied to the string. • ④ ⑤ ⑥ ③ ② ① B. ③ ④ ⑤ ⑥ ② ① • C. ④ ③ ⑤ ⑥ ① ② D. ③ ④ ⑤ ⑥ ① ②

18. 4. Before his experiment, Franklin had to prepare the following EXCEPT______ A. a strong kite B. really bad weather C. a metal key D. a condenser

19. Benjamin Franklin was a famous American scientist. In June 1752, he did a kite experiment to __________ that lightning and electricity were the same. He made a kite ,which could __________lightning. The kite was made of______ so that it would not ________ too soon. He _________ a very sharp piece of metal and then _______ a key to the ________of the long string and finally he______ a silk _______ to the string, just _______the key. When a __________ appeared, he went to a _________in the field and flew the kite to the sky. Soon he saw the hairs on the string _______________ because the string got________. He brought his finger to the string and felt a light but clear ____________________. With the help of a key and a ___________,he was able to __________ a great deal of electricity. prove attract silk tear fastened fixed end tied ribbon above thunderstorm shed stand up charged electric shock collect condenser

20. Homework 1. Finish all the exercises in the Post-reading. 2. Try to write down an experiment you did in English.

21. Thank you for coming & Goodbye !