Show:
Benjamin Franklin
Alexander Graham Bell
Thomas Edison
100
What did Benjamin Franklin use to find electricity?
A kite and key
100
What is the main invention that Alexander Graham Bell invented?
The telephone
100
What was Thomas Edison's most known invention?
The light bulb
200
Why did Benjamin Franklin invent bifocals?
He was tired of switching between two pairs of glasses.
200
Who did Alexander work with?
Tom Watson
200
Thomas Edison created a device that you could record your voice into and it would play it back. What was this device called?
The phonograph
300
What was the first thing that Alexander Graham Bell said to Tom Watson on the phone?
"Come here, Watson."
300

When did he leave school?

He left school after three months

400

What did Bell invent in 1881? What was it used for?

He invented a metal detector. It is used to find hidden metal.

400

When did he take his first job?

In 1859

500
What year was Alexander Graham Bell born?
In 1847
500

When did he invented the phonograph and what was it used for？

He invented the phonograph in 1877. It played sounds.