Pre-Reading:1.Do you know the names of

some famous scientists?

2. What are they famous for?

Madame Curie

Isaac Newton

Lord Kelvin(lowest temperature)

Physics:

(radioactivity)

(gravity )重力

Medicine:Florence Nightingale(Pie charts)

John Snow(spread of disease)

Louis Pasteur

(germs 基因 )

Chemistry: Watson & Crick

(DNA)

Gay-Lussac

(Gas laws)

Mendeleev

(Periodic Table of elements 元素 )

Biology:

Beatrix POtter

(“seed of mushrooms)

Charles Darwin

(Evolution)

Carl Linnaeus

(Naming Plants)

Franklin’s Famous Kite Experiment

Benjamin Franklin

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.

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?

?

kite Kite experiment

A kite

condenser

A key

wood

silk

metal

string

tail

rope

Bad weather

The process of the ExperimentThe process of the Experiment

Discussion:

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

Homework:1.Finish the report.

2.Review the lesson.

3.Tell the experiment with your own words.

Goodbye!