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360
Aristotle
He developed the theroy that all matter consisted of four elements: Earth, Air, Water and Fire. There were also four qualities: dryness, hotness, coldness, and moistness. Fire was dry and hot, water was moist and cold, etc. Each of these elements move naturally in a line to their "proper place," where it will be at rest. Aristotle's theory also had two forces: conflict and harmony. Conflict was thought to cause bad things, and harmony good things. Aristotle also believed that the heavens were ma -
460
Democritus
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460
Democritus
Democritus, was the man that develped the idea of atoms. He was able to conclude that at some point matter ended, and you could not break it down anymore. And he called these basic matter particles, atoms. -
Gravity
Isaac Newton discovered what makes everything make sence. -
Joseph Proust
Proust first published his Law of Definite Proportions. This law states that a compound is composed of exact proportions of elements by mass regardless of how the compound was created. -
John Dalton
He began to use symbols to represents atoms that had different elements. -
Electricity
Michael Faraday was the main discoverer of this important modern day necessity. -
Periodic Table
Dmitry Mendeleev discovered what is used in almost every science class. -
Chapstick
Dr. Charles Browne Fleet, a physician and pharmacological thinker from Lynchburg, Virginia, invented ChapStick as a lip balm. -
Telephone
Alexander Grand Bell theorize about telephone devices that transmit sound -
Deodorant
A product known as Mums was the first deodorant product and was invented in 1888. The inventor is unknown, but it was made in Philadelphia, PA. -
Hair Dryer
Before the invention of the hair dryer, it was common for men and women to dry their hair using a vacuum cleaner. In fact, the original model of hairdryer was invented in 1890 by Alexander Godefroy -
X-rays
Wilhelm Roentgen discovered something that is used everyday today to be able to understand what is happening with our bones. -
J.J Thomson
Thomson proved that cathode rays were made up of a unknown negatively charged particle, which was the creation with the of the electron. Thomson is also known for finding the first evidence for isotopes. -
Thomson's Plum Pudding
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Quantum Mechanical Model
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Max Planck
Max Planck thought of the Quantum Theory. He proposed that atoms could only emit (give out) energy in fixed units called quanta. The theory has been developed to explain the behavior of particles and the energy they emit. -
Henri Becquerel
He was able to discover radioactivity thoughout his investigations of uranium and other sustances he studied. -
Albert Einstein
After gettng his PHD he published his Special Theory of Relativity, which later led to the General Theory of Relativity, which led to his designation as “the father of modern physics.” He was also able to prove the existence of atoms mathematically. -
Ernest Rutherford
Rutherford publishes his atomic theory describing the atom as having a central positive nucleus surrounded by negative orbiting electrons. This model suggested that most of the mass of the atom was contained in the small nucleus, and that the rest of the atom was mostly empty space. -
Rutherford Model of an Atom
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Neils Bohr
Bohr invented the Bohr model with electrons in orbit around it. Also he helped develop the quantum mechanics which shows electrons that move from one energy level to another in certian steps instead of continuously. -
Bohr Model of an Atom
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Robert Millikan
Millikan conducted the Oil Drop Experiment, in which he sprayed tiny oil droplets and had them fall through a small, charged hole into a closed area. The oil droplets now had a charge on them. He, then, introduced the area to an electric field. The charged oil particles now moved up and down at his whim. By observing the speed of the particles, he was able to find out the charge on a single electron: 1.6*10-19 Coulombs. -
Louis de Brogile
Louis de Brogile developed the Wave Mechanic Theory. He believed that electrons can act like both particles and waves, just like light. He also said that waves produced by electrons contained in the orbit around the nucleus, set up a standing wave of a certain energy, frequency, and wavelength. He discovered that electrons can act like waves which helped explain some of the things electrons do that we had never been able to explain before. -
Erwin Schrodinger
He took the Bohr modle one step further by using different mathematic equations in order to describe what the chances were of finding an electron in a certian position. -
Werner Heisenberg
He established the field of quantum mechanics. Heisenberg suggested that any theory of the atom must be based on observable phenomenon, such as the spectral lines emitted by atoms, and not pictorial constructs such as Bohr's nuclear model of the atom. -
James Chadwick
Chadwick was awarded the Hughes Medal of the Royal Society in 1932 and later on a Nobel Prize for Physicas. He got those by proving that neutrons do infact exist. -
DNA
James Watson and Francis Crick discovered the double-helix structure of DNA. -
Super Glue
Cyanoacrylates were discovered in 1942 during research into plastic gun-sights for war use. The substance was considered useless because it stuck to absolutely everything. Almost a decade later, researchers for Eastman Kodak, Harry Coover and Fred Joyner, realized cyanoacrylates might have their uses after all, and by 1958, Super Glue was on the market
