Franklin ’ s Famous Kite Experiment

FranklinLightningKite These three are different things. Can they be relative ? Franklin did a kite experiment to prove that electricity and lightning are the same.

Franklin’s Famous Kite Experiment

What’s a kite usually made of ? paper wooden sticks string kite

What’s Franklin’s kite for the experiment made of ? string sharp metal key kite silk handker -chief wooden sticks silk ribbon

Kite experiment Bad Weather Silk Kite What are needed to do Franklin’s kite experiment ? Condenser Key Shed

Things needed Functions Franklin’s Famous Kite Experiment a silk kite to attract lightning, to last longer in bad weather. to direct electricity forwards the condenser a key bad weather No bad weather,no lightning. a condenser to store electricity a shed to keep himself and his tools dry so that he himself would not be hit by the lightning

Things needed Functions Franklin’s Famous Kite Experiment wooden sticks To build the frame of the kite by making a small cross to control the kite by tying a long string to the cross a string a sharp piece of metal to pull the electricity from the thundercloud a silk ribbon to stop the kite from flying away without touching the charged string

I.True or False statements : 1.In 1752 scientists already knew what electricity is 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. ( ) T F F F T Post- readin g

II.Answer the following questions : 1. Was the kite experiment done by Franklin in June 1752 successful ? 2. Why did Benjamin Franklin do this experiment with the kite ? 3. Why is it better to make the kite of silk than of paper ? 4. Do you think Franklin’s experiment dangerous ? Explain.

1.Was the kite experiment done by Franklin in June 1752 successful ? 1. Yes, very successful. 2. Why did Benjamin Franklin do this experiment with the kite ? He wanted to prove that electricity and lightning are the same. 3. Why is it better to make the kite of silk than of paper ? A silk kite will last longer in bad weather than a paper one. 4. Do you think Franklin’s experiment dangerous ? Explain. 4. Yes, very dangerous. Because if something went wrong, he could be killed by the lightning.

III. The pictures below show how Franklin did his experiment. Pick out the correct ones. (1) (4) (3) (2)

Consolidation wooden sticks Kite experiment Silk handkerchief silk ribbon key a sharp piece of metal string kite condenser shed bad weather

Franklin’s Famous Kite Experiment Purpose Materials Results to show that lightning and electricity are the same. silk handkerchief, wooden sticks, a string, a sharp piece of metal, a key, a silk ribbon,a condenser, a small shed, a thunderstorm with lightning The electricity stored in the condenser can be used to do other experiments, which proves that lightning and electricity are the same.

Homework Titlea Kite ExperimentName Purpose Materials Procedure Results Conclusion Homework A Report Of the Kite Experiment