Important people from the past!

Alexander Graham Bell was...

• a doctor

• a lawyer

• an inventor

In 1871 Alexander began working with....

• blind people

• deaf people

• minusvalid people

Alexander was trying to discover the secret to...

• transmitting voice and images on a wire

• trasmitting the voice on a wire

• transmitting multiple messages on a single wire

One of Bell´s assistants was...

• Albert Einstein

• Thomas A. Watson

• Thomas Edison

Alexander Graham Bell invented the...

• TV

• radio

• telephone

Bell also was the precursor to the modern air-conditioning and a device called...

• photophone

• tablet

• microwave

On the day of Bell´s burial all telephone services in the USA was stopped for...

• 1 second

• 1 hour

• 1 minute

Marie Curie married with...

• Pablo Curie

• Pierre Curie

• Peter Curie

Marie and her husband were able first to isolate a new element called..

• Uranium

• Radium

• Polonium

After years of research and investigation the Curies proved the existence of this other element in the pitchblende...

• Magnesium

• Radium

• Hydrogen