Plate tectonics (from the Late Latin tectonicus, from the Greek: ÏÎµÎºÏÎ¿Î½Î¹ÎºÏÏ pertaining to building) is a scientific theory describing the large-scale motion of 7 large plates and the movements of a larger number of smaller plates of the Earth's lithosphere, over the last hundreds of millions of years.
1600s | 1700s | 1800âs. Benjamin Franklin was one of most innovative Americans of all time. In deed, his work and experiments resulted in several important discoveries and inventions including electricity, bifocal glasses, a usable battery and many more. Ben Franklin believed electricity could be harnessed from lightning. In 1752, he devised an experiment to test his theory. Although details of the experiment remain sketchy to this day, Franklin originally wanted to test his theory atop a spire that was to be built on a Philadelphia church.
History of Electricity-Early Inventors. Otto von Guericke proved that a vacuum could exist. Creating a vacuum was essential for all kinds of further research into electronics. In 1660, Otto von Guericke invented a machine that produced static electricity, this was the first electric generator. In 1729, Stephen Gray discovered the principle of the conduction of electricity. In 1733, Charles Francois du Fay discovered that electricity comes in two forms which he called resinous (-) and vitreous (+), now called negative and positive.