Unit 16Unit 16

Franklin’s Franklin’s famous kite famous kite experimentexperiment

新昌职业技术学校 徐美红

Ancient Greece static electricity

1745 Leyden jar

1880 Electrical bulb (Edison)

1923 Television

1943 Computer

1989 World-wide web

1993 Human embryos cloned

1997 Dolly, the sheep, the first cloned

animal

A list of some important Discoveries &

Inventions

Static electricity

Leyden jar ( 莱顿瓶 )

Edison

Life without electricity

Life with electricity

Benjamin Franklin(1706-1790)

Statesman, scientist, inventor, publisher of the Pennsylvania Gazette, member of the Continental Congress and the Constitutional Convention, signer of the Declaration of Independence, first U.S. Postmaster General, American commissioner to Paris.

Pre-reading Find the words that fit the

descriptionsc______ lead or guide (sb. /sth.)

c______ amount of electricity put into a battery

or contained in a substance

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

a______ become visible

onductharge

rove

ear

asten

xplainppear

While-reading

Look at the textbook and listen to the tape carefully, then try to complete the following chart.

Task 1

Name

Time

Attendee

Purpose

Things needed

A record of the experimentKite Experiment

Franklin and his sonLightning and electricity

are the same.

a kite, a key, some really bad weather and a

condenser

In June 1752

Task 2Read the text quickly and try to get the main idea of each paragraph.

to make a special kite for the experiment?

should be done to get ready for 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 experimentPara 1

Para 2

Para 3

Para 4

Para 5

Para 6

Introduction

How

How

What

How

Process of the experiment

The tips of doing the experiment

Read the text carefully, then do some exercises.

Task 3

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

Franklin's Kite Experiment

Exercise 2

DemonstrationDraw a sketch( 草图 ) of t

he kite which was used in the experiment according to the instruction.

Instruction① A small cross of two pieces of light

wood.② Tie the corners of a handkerchief 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 of the cross.

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

⑦ Tie a silk ribbon to the string.

Post-reading

Finish the exercise on page 25 in group of four.

Interview( pair work):

One plays a reporter and the other plays Franklin. Make a live interview to Franklin .

Discussion (group work):

What can we learn from Franklin?

Homework

1.Try to retell the text after class.

2.Search and Collect more information about your favourite scientist at work on the internet.