Unit 16 Scientists at work

1. Unit 16 Scientists at work The second period

2. Nobel the inventor of the detonator and set up”Nobel Prize” Newton the founder of the law of universal gravitation

3. Marie Curie The founder of radium and uranium Darwin the founder of the theory of evolution

4. Benjamin Franklin (1706~1790) If you would not be forgotten, as soon as you are dead or rotten,either write things worth reading, or do things worth the writing.

5. The structure of this passage: • Part1( ): 1-3 The description of the experiment Part2( ): 4-6 How to make the kite and how to do the experiment

6. 1.When did Benjamin Franklin conduct his experiment? 2.What was the purpose of this experiment? 3.What was needed in this experiment? 4.What was the result of the experiment? Did it succeed? In June 1752 To show that lightning and electricity were the same. The electricity stored in the condenser can be used to do other experiments, which proved that lightning and electricity were the same.

7. A kite experiment A kite A key Some really bad weather A condenser to store electricity

8. Some wooden sticks A piece of silk A kite A very sharp piece of metal A ball of string A silk ribbon

9. shed condenser ribbon key

10. Fill in blanks: 1. Frankline attracted lightning by using a . 2. His kite is made of . 3. A silk kite does not attract lightning, so he had to fix a long sharp piece of to the top of the longest stick of the cross. 4. He brought a to store electricity. 5. He used a small in the fields to keep himself and his tools dry. 6. He tied a silk to the string that he kept dry by standing inside the shed, so that the kite could not fly away and could keep safe. 7. He directed the electricity towards the condenser with a piece of metal at the end of the string by tying a metal to the end of the string. kite silk metal condenser shed ribbon key