-
370
Area Under a Curve Determined
Eudoxus of Cnidus comes up with the method of exhaustion for mathematically determining the area under a curve. -
400
Catapult is Invented
Catapult video
Greek engineers invent the catapult. Which is a weapon used to launch objects long distances. -
460
Democritus
Claimed that everything is made up of atoms. That between atoms lies empty space, atoms are indestructible, will always be in motion, and there is an infinite number of atoms. He reasoned that the solidness of a material corresponded with the type of atom involved. -
Antoine Lavoisier
Known for experimental skills. Used his experiments to come up with the Law of Conservation, the law that states that matter cannot be made or destroyed. He also mentioned the rearrangement of matter in reactions. -
Joseph Proust
Proust proved that substances always combine in constant and definite proportions. His largest accomplishment was creating other elements from water. -
U.S. Declares Independence from Great Britain
The thirteen original U.S. colonies, at war with Great Britain at the time, announces they are no longer part of the British Empire. Instead they formed a union to become a new nation. John Adams was the leader of the movement, but there were others including: Benjamin Franklin and Thomas Jefferson. -
Amadeo Avogadro
Came up with the law: equal volumes of gases at the same temperature and pressure contain the same number of molecules regardless of their chemical nature and physical properties. -
John Dalton
Atomic theory was based on atoms of different elements could be distinguished by their weight. Basic ideas of his theory: All matter composed of atoms, can't be created or destroyed, atoms of the same element are identical, different elements have different types of atoms, chemical reactions occur when atoms are rearranged. -
Storming of the Bastille
Originally meant to be a fortress. It was stormed by a crowd during the French Revolution. It became an important symbol for the French Republican movement. -
William Crookes
Discovered cathode rays had the following properties: travel in straight lines, cause glass to fluoresce, put a negative charge on objects they strike, are deflected by electric fields and magnets to suggest a negative charge, they cause pinwheels in their path to spin leading us to believe they have mass. -
Henri Becquerel
Worked with others to discover radioactivity. While studying the effect of x-rays on photographic film, he discovered some chemicals spontaneously decompose and give off dangerous rays (radioactivity). -
J. J. Thomson
In 1897, showed that cathode rays were composed of a previously unknown negatively charged particle. So he was given credited with the discovery and identification of the electron. -
Max Planck
He originated quantum theory, which is now a huge part of 20th century physics along with Albert Einstein's work. -
Madame Curie
She studied uranium and thorium and called their spontaneous decay process "radioactivity". She and her husband also discovered the radioactive elements polonium and radium. -
Robert Millikan
His oil drop experiment determined the charge and the mass of an electron. He proved that this was the same for all electrons, so in turn he demonstrated the atomic structure of electricity. -
First Motion Picture
Motion picture of a horse and rider
First motion picture is shown to a theatre audience in Philedelphia, Pennsylvania. It was a silent film and was also in black and white. -
Ernest Rutherford
Described the atom as having a central postivie nucleus that is surrounded by negative orbiting electrons. his model suggested that most of the mass of an atom was in the nucleus. -
Albert Einstein
Developed the general theory of relavtivity. In 1917 applied the general theory of relativity to model the large-scale structure of the universe. -
Patent of the Lamp
Thomas Edison patents his electric incandesent lamp. The lamp provided light to people so they could see in the dark after the sun had set. -
Niels Bohr
Most important contribution to modern physics was his atomic model. He was the first to discover that electrons travel in separate orbits around the nucleus and that the number of electrons in the outer orbit determine the element. -
Erwin Schrodinger
Formed the basis of wave mechanics and formulated the wave equation during his work in the field of quantum theory. His most famous thought experiment was Schrodinger's cat. -
Henry Moseley
Came up with the concept of the atomic number. Developed Moseley's law which justified many concepts in chemistry by sorting the chemical elements of the periodic table into a logical order based on their physics. -
James Chadwick
Using alpha particles, he discovered a neutral atomic particle with a mass close to a proton. This was the neutron. -
Louis de Broglie
He discovered that electrons had a wave nature, and suggested that all matter have wave properties. -
Werner Heisenberg
Discovered the Uncertainty Principle which states that electrons don't travel in neat orbits and all electrons contain photons that change momentum and physics. His contribution to the atomic theory was that he calculated the behavior of electrons and subatomic particles that also make up an atom. -
World War I
Trench Warfare in WWI
Global war centered in Europe. It began when a serbian assasinated the archduke of Austria, which then pitted the Central powers against the Allied powers. -
Lie Detector
John Larsen invents the lie detector. This device was used on criminals and people suspected to be spys. -
-
Rise of Adolf Hitler
Adolf Hitler speeches
Hitler joined the political party called the NSDAP (Nazi party). This party wanted to unite all German speaking countries, and they were also anti--Semitism. He worked his way to the top of the party in the beginning of his career, because he was such a fantastic speaker. -
Aristotle
Came up with his theory of matter which stated that he believed there were only five elements: air, earth, water, fire, and aether. He was later proven wrong, but he did help the progression of the scientific community by saying that there are elements.
