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John Dalton
(1766-1844)
All matter is composed of extremely small particles called atoms
Atoms cannot be created, divided into smaller particels, or destroyed
In a chemical reaction, atoms are separated, combined, or rearranged -
First car
Easier way to drive around places and stopped using horses. Could get to farther places. Haul grain -
Antonie Lavoiser
He compiled a list of elements known at the time. The list contained 23 elements. -
Joeseph Proust
He created elements from water. and he did definite proportions. -
Arnadeo Avogadros
he determined the volume of one mole of a gas. -
J.J. thomson
did a series of experiments with cathode ray tubes to determine the ratio of its charge to its mass. Thomson was able to determine the charge to mass ratio. The conclusion was shocking becasue they found out that there were atoms smaller then hydrogen. -
Abraham Lincoln Assassination
His death came after the most important battle in the U.S. And after his famous speech. -
First Tractor
The first ones used were steam powered and used on farms. -
Henri Becquerel
He helped with the discovery of radioactivity. -
First Case Tractor
First Case TractorThat year they came out with a new threshing machine and their first gasoline powered tractor. -
Max Planck
He figured out matter can gain or lose energy only in small, specific amounts called Quanta. -
Democritus
(460-370 B.C.)
Matter is composed of empty space through which atoms move
Atoms are solid. homogenous, indestructible, and indivisilble
Different kinds of atoms have different sizes and shapes -
Aristotle
(384-322 B.C.)
One of the most influential philosophers
most of his writings have been lost through the ages -
William Crooks
He came up with the cathode ray fromradiation in a tube. These are used in televisions and computers. -
Robert Millikan
He determined the charge of an electron. So good was his experiment that he was within 1% of the current value. He calculated the mass of the electron. -
Ernest Rutherford
He studied how positiely cahrges particles interacted with solid matter. He conducted an experiment to see if alpha particles would be deflected as they passed through a thin foil of gold. -
Henry Moseley
He came up with the atomic number which is the same amount of protons are in the atom. -
Niels Bohr
Proposed a Quantum model for hydrogen atom. He proposed that the hydrogen atom has only certain allowable energy states. -
Louis De Broglie
He proposed an idea that accounted for the fixed energy levels of Bohr's model. he proposed that can particles matter including electrons behave like waves. -
Werner Heisenburg
concluded that it is impossible to make any measurment on an object without distrurbing the object at least a little. -
Erwin Schrodinger
Schrodinger derived an equation that treated the hydrogen atom's electron as a wave. It seemed to apply equally well to other atoms. -
James Chadwick
He showed that the nucleus also contained another subatomic particle, a neutral particle called the neutron. -
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Albert Einstein
He came up with the general idea of relatively. He laid the foundation the photon theory of light. -
Madame Curie
She helped with radiactivty. Techniques for isolating radioactive iosotops. She also discovered 2 elements polonium and radium. -
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Polaris First Snowmobile
First Polaris SnowmobilePolaris joined the race of snowmobiles are started with a bang and is one of the premier leaders of today. -
Death iof Martin Luther King jr.
Death of Martin luther King jr. Famous African American Rights leader. Pretty much gave blacks freedom. -
Assassination of John Lennon
He was in the famous Beatles Band. -
Death of Osama Bin Laden
One of the biggest deaths in U.S. They went in and raided him and it was a covert operation.
