oxidades

cotxe oxidat
aixeta oxidada

balla oxidada

inventors

Who was"Alexander Grham Bell and what did he invent?
He was Scientist Bell and he Invent Telephon.
Who was"Lavis Braille"and What did he invent?
He was a French linguist and he invented Reading for Blind.
Who was "Guglileno Marconi"and what did he invent?
He was"Inventor and what did invent comunication Thelegraphic

El Henry Besemer es va neixer el 19 de gener del 1813 i es va morrir el 15 de març del 1898ell es va inventar el ACER fet el 1856.

composisio de l'Aire

El 78% de aire de la terra el nitrogen.

El21% es de oxigen.

El 7% de co2.