3. Pre-Reading: 1.Do you know the names of some famous scientists? 2. What are they famous for?

4. Madame Curie Isaac Newton Lord Kelvin (lowest temperature) Physics: (radioactivity) (gravity ) 重力

5. Medicine: Florence Nightingale (Pie charts) John Snow (spread of disease) Louis Pasteur (germs 基因 )

6. Chemistry: Watson & Crick (DNA) Gay-Lussac (Gas laws) Mendeleev (Periodic Table of elements 元素 )

7. Biology: Beatrix POtter ( “ seed of mushrooms) Charles Darwin (Evolution) Carl Linnaeus (Naming Plants)

8. Franklin ’ s Famous Kite Experiment Benjamin Franklin

9. 1. Read the statements on the paper and decide if they are true or false before and after you read. 1.In 1752 scientists already knew what electricity was. 2.Franklin was helped by a friend to do the experiment. 3.Franklin made the kite of silk because wet silk does not conduct electricity. 4. A condenser was used in the experiment to store electricity. 5. The key tied to the string was put into the door to stop the kite from flying away.

10. Answer the following questions. 1.Why did Benjamin Franklin do this experiment with the kite? 2.Why is it better to make the kite of silk than of paper? 3.How to make the kite for the experiment? What things do we need? ?

11. kite Kite experiment A kite condenser A key wood silk metal string tail rope Bad weather

12. The process of the Experiment

13. Discussion: 1. Do you think Franklin ’ s experiment was dangerous? Why? 2. What do you learn from Franklin?

14. Homework: 1.Finish the report. 2.Review the lesson. 3.Tell the experiment with your own words. Goodbye!