-
Democritus was a greek philosopher that lived from 470-360 B.C. Her was the first person to state that matter is not infinitely divisible. He also stated that matter is composed of empty space through which atoms move and atoms are solid, homogeneous, indestructable, and indivisible.
-
Aristotle was an influential philosopher that lived through the years 384-322 B.C. He wrote extensively on topics like physics, nature, and atronomy. Unfortunately most of his writings have been lost throughout the ages.
-
Christopher Columbus, an italian explorer, embarks on a journey to find the West Indies.
-
Columbus sets foot on North American soil. He discovers what is now America.
-
Jamestown is settled, and thousands of Brittish people come to the "New World."
-
The Declaration of Independence is signed. We become the United States of America.
-
He was known as the "father of modern chemistry." Antoine discovered the elements hydrogen, oxygen, and sulfur. He also helped construct the metric system and put together the first extensive list of elements.
-
Ben Franklin invents biofocal eyeglasses.
-
He developed th Law of Definite Proportions.
-
John Dalton was an english school teacher. He developed the Atomic Theory in 1805.
-
The American inventor Oliver Evans, known as the "father of refrigeration," invented the vapor-compression refrigeration machine in 1805.
-
He worked with the molecular thoery and created Avogadro's Law.
-
Civil war between the North and the South begins.
-
The telephone was invented by Alexander Grahm Bell.
-
In the late 1890's J.J Thomson began a series of cathode ray tube experiments to determine the ratio of its charge to its mass. He concluded that the mass of a charged particle was much less than that of a hydrogen atom, the lightest atom. This discovery was shocking because it implied that John Dalton was wrong.
-
During and experiment he noticed a flash of light within one of the tubes. By seeing this he discovered the cathode ray.
-
He discovered that atoms of each element contain a unique positive charge in their nuclei.
-
Henri received a Nobel Prize with Pierre and Marie Curie for their co-discoverment of radioactivity.
-
The first airplane was invented by Wilbur and Orville Wright. They called their invention "The Flying Machine."
-
American physicist Robert Millikan determined the charge of an electrom.
-
She developed the Theory of Radioactivity and discovered the elements polonium and radium.
-
Discovered the Quantum Theory and received a Nobel Prize in Physics.
-
He stated that the nucleus contain positively charged particles called protons. He also received a Nobel prize for chemistry in 1908.
-
He revolutionized physics by developing the Theory of General Relativity. He also discovered the Law of the Photoelectric Effect.
-
Nies Bohr was a Danish physicist who made major contributions to the understanding of the atomic structure and quantum mechanics. Received a Nobel Prize for his work on the Manhattan Project.
-
Louis deBroglie was a french physicist that won a Nobel prize for his development of the Wave-particle Duality Theory of Matter.
-
James Chadwick was an english physicist that proved that the nucleus contained another subatomic particle, the neutron.
-
Werner Heisenburg was a german theoretical physicist that received Nobel Prize for his work with Quantum Mechanics and the Uncertainty Principle of Quantum Theory.
-
Erwin Schrodinger was an austrian physicist and theoretical biologist. He is known as the "father of quantum mechanics." He won a Nobel Prize for his work with them.
-
The first mobile telephone call made from a car occurred in St. Louis, Missouri, USA on June 17, 1946, using the Bell System's Mobile Telephone Service.
