Biologist

Discovered the ancestors of people were monkey

Published “the Origins of species” (物种起源 )

Darwin

The greatest woman scientist

Discovered the radium and polonium(镭 ,钋 )

Her discovery of radium opened

the treasure-house(宝库 ) of atomic(原子 ) energy

She was given two Nobel prizes

Madame curie

★Regarded as the US founding father . He signed the Declaration(宣言 ) of Independence and the Constitution(宪法 ) of the United States.

American statesman(政治家 ); inventor; writer; scientist and diplo

mat(外交家 )

Benjamin Franklin(1706-1790)

Franklin’s Famous Kite Experiment

16

to make a special kite for the experiment?are the three steps to do the experiment?to do the experiment with a kite, a key and a condenser?

did Franklin succeed in doing the experiment?

did Franklin do the experimentWhy

Franklin’s famous kite experimentIntroduction

How

How

What

How

Para 1

Para 2

Para 3

Para4

Para 5

Para6

Reading

Purpose

ResultsThe electricity stored in

the condenser can be used to do other experiments ,

which proves that lightning and electricity are the same .

Para2-3Franklin’s Famous Kite Experiment

to show that lightning andelectricity are the same

Things needed

for the

experiment

Instructions for

Making the kite

A kite , a key a condenser ,

a small shed , bad weather

build frame ,tie corners to ,

add a tail to , tie string to the cross.

fix metal to ,fasten key ,

tie silk ribbon

Para4-5

a kite bad weather( thunderstorm)

a key a condenser

Attract lightning

to direct electricitytowards the condenser

to collect and store electricity

to have lightning

风筝示意图

to attract electricity

1.build the frame by making a small cross

2.tie the corners to the points of the cross

3.add a tail to the frame

4.tie a long string

to the cross

5.fix a sharp piece of metal to the top of the longer stick

6.fasten a key to the end of the long string 7.tie a silk ribbon

to the string above the key

How to do the experiment

with a kite, a key and a condenser ?

Attention items?

Para6

111

to keep himself and his tools dry so that he himself would

not be hit by the lightning

a shed

Mustn’t be wet

Discussion

Do you think Franklin’s Experiment was

dangerous?

Why?

Which ones are correct according to the text?

Post-reading

True or false?

1.In 1752 scientists already knew what electricity is.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 flying away.6.The experiment can be done at any time.

T

F

F

T

F

F

Exercise 1

Multiple choice1.Franklin made the kite of silk

because ______.

A. wet silk does not conduct electricity

B. silk kite flies high

C. silk kite will last longer in weather with rain and strong winds

D. silk kite is cheaper

C. silk kite will last longer in weather with rain and strong winds

2. Which is not stated but can be inferred from the text?

A. Franklin did the experiment with the kite.

B. Franklin’s experiment with electricity was dangerous.

C. Franklin failed the experiment again.

D. The experiment was conducted in bad weather.

B. Franklin’s experiment with electricity was dangerous.

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.A. 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

ConsolidationConsolidation

wooden sticks

Kite experiment

Silkhandkerchief

silk ribbon

key

a sharp piece of metal

string

kite

condenser

shed

bad weather

Title: Experimenter’ name

Purpose:

Procedure:

Results:

Conclusion:

the kite experiment reportHomework :

Bye-bye!

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

fixed fastened end tied

ribbon above thunderstorm shed

stand up charged

electric shock

condenser collect

Fill in the blanks.

a handkerchief

string

a key

a silk ribbon

two pieces of light wood

a sharp piece of metal (one foot or more)

What do we need to make the kite?

1.build the frame by making a small cross

2.tie the corners to the points of the cross

3.add a tail to the frame

4.tie a long string to the cross

5.fix a sharp piece of metal to the top of the longer stick

6.fasten a key to the end of the long string

7.tie a silk ribbon to the string above the key

How to make Franklin’s kite?

tail

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 attract electricity

a silk ribbonto protect you from the electricity

It is difficult to go and look for lightning

A kite made of paper won’t last long in rainy weather

A silk kite doesn’t attract lightning

He had to collect and store the electricity

He had to make sure that he would not be hit by the lightning

He had to stop the kite from flying away, without touching the string that would be charged with electricity

He had to direct the electricity towards the condenser

He waited for bad weather and attracted lightning by using a kite.

His kite was made of silk.

He fixed a sharp piece of metal to the top of the longer stick.

He used a condenser.

. He used a small shed in the fields

He tied a silk ribbon to the string that he kept dry.

He tied a metal key to the end of the string.

After-class activities:1. Describe Franklin’s kite experiment.2. Describe the steps to make a fruit battery.3.Search more scientists and their famous experiments. Share them!

What do you think of Benjamin Franklin? What can you learn from him?

Things needed FunctionsFranklin’s Famous Kite Experiment

a silk kite to last longer in bad weather

to direct electricitytowards the condensera key

bad weather to have lightning

a condenser to collect and store electricity

a shedto keep himself and his tools dry so that he himself would not be hit by the lightning

Discussion

Do you think Franklin’s experiment was dangerous?

List the difficulties that Franklin met when he was doing the kite experiment

How did Franklin solve these problems?

Summary

In order to show that lightning and electricity are the same, Franklin built a strong kite .When the bad weather came, he did his experiment by using his kite and condenser. He found that the string was getting charged and he could feel a light but very clear electric shock. So he store much electricity in the condenser.This experiment proved his idea.

To do this experiment ,four objects are needed :a kite ,a key , some bad weather and a condenser.Then the next three steps are very important.First, fix a very sharp piece of metal. Second, fasten a key to the end of the long string.Third, tie a silk ribbon to the string.

Life without electricity

Find the words that fit the

descriptionsc______ allow(heat,electricity etc) to pass into

a battery.

p______ show that sth is true or certain by

means of argument or evidence( 证据 )

t______ pull (sth) forcibly apart or away or to

pieces

f______ firmly attach sth to sth or two things

together

e______ make sth clear or easy to understand

onduct

rove

ear

asten

xplain

Step 2 ： PresentationAs we all know ,

Benjamin Franklin is a famous politician ．

But today, we will read a passage about him as a scientist.

His serious attitude to science .Let’s see how Franklin made

his famous electricity experiment by flying a kite ．