以下为课件内提取的文本内容，仅供参考：

抚顺市四方高级中学

授课教师：李堃

http://www.yingyu.com.cn

A brief introduction of Franklin

Benjamin Franklin

(1706～1790)

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.

True or False:

F

F

T

F

T

Questions

Why did Franklin do this experiment?

What happened during the experiment?

What’s the results of the experiment?

What do we need to do the experiment?

How can you make a kite ?

Why is it better to make the kite of silk than of paper ?

What are the next three steps after you make a kite ?

What should be paid attention to when it was being done?

How can we make a kite?

_____the _______of the kite by making a small cross of two pieces of_____ ______. The pieces should be just long enough to _____the corners of the handkerchief. ___ the corners of the handkerchief ___the points of the cross. ____a tail ___the frame and ___a long string____the cross so that you can ______the kite.

Build

frame

light wood

reach

Tie

to

Add

to

tie

to

control

paper

wooden sticks

string

kite

The next three steps are very

important. First, ___a very sharp

piece of ______,pointing a foot or

more. Second,_______a key to the

end of the long string. Third,____a

silk ribbon ___the string, just above

the key. This ribbon which must

not____ ____,will________you

_____the electricity.

fix

metal

fasten

tie

to

get wet

protect

from

string

sharp metal

key

kite

wooden sticks

silk ribbon

Condenser

Instructions

A small cross of two pieces of light wood.

Tie the corners of a handkerchief to the points of the cross .

Add a tail to the frame .

Tie a long string to the cross.

Fix a sharp piece of metal to the top of the longer stick of the cross.

Fasten a key to the end of the long string.

Tie a silk ribbon to the string.

Connect a condenser to the end of the string.

The making process

(过程)

Introduction of the experiment.

The process of the experiment

Tips of doing the experiment

Para1

Para2-3

Para4-6

Main idea

Discussion

Do you think Franklin’s experiment dangerous ? Why?

What can you learn from Franklin?

Kite experiment

Benjamin Franklin

Show that lightening and electricity are the same

A thunderstorm with lightening

The electricity stored in the condenser can be used to do other experiments

Homework: Experiment Report

Two pieces of sticks

(2)

A handkerchief

(3)

A long string

(4)

A tail

(5)

A silk ribbon

(6)

A key

(7)

A condenser

(8)

A sharp of metal