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| a German scientist who expanded the field of physics with the quantum theory of matter and energy. |
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| a New Zealander called "The Father of Nuclear Science," he also advanced the science of physics in 1911 with his nuclear theory of the atom |
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| a Danish physicist who revised Rutherford's work and produced the planetary model of the atom, which showed subatomic particles revovling around a nucleus made up of protons and neutrons |
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| a German of Jewesh descent, revolutionized the scientific world with his theories of relativity which uncovered new principles of order and reality, dramatically increasing out understanding of the universe |
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| the best-remembered American agricultural scientist |
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| a Cuban physician, he theorized that a particular kind of mosquito transmitted the yellow fever germs from one victom to another |
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| Walter Reed and William Gorgas |
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| they proved Finlay's theory and took steps to eleminate the disesase |
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| organized the Ford Motor Company in 1903 |
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| process to increase speed and cut cosst of production |
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| Count Ferdinand von Zeppelin |
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| one of the early pioneers in aviation of Germany |
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| Zeppelin designed and built a rigid, lighter then air "airship" |
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| Orville and Wilbur Wright |
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| made the first successful flight at Kitty Hawk, North Carolina |
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| a direct result of the wireless telephone |
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| the first commercial broadcasting station |
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| the British luxury liner that sank in the icy Alantic Ocean |
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| leader in Germany was eager to flex its muscles, expand, and demonstrate its strength to the older, established nations of Europe |
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| including Germany, Austria-Hungary, and Italy |
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| consisted of France, Great Britian, and Russia |
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| Archduke Francis Ferdinand |
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| heir to the Austrian throne, and his wife were assassinated by a Serbian revolutionary in town of Sarajevo, Bosnia |
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| began on July 28, 1914, also known as the Great War, ended July 28, 1918 |
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| French forces stopped the German advance in a stunning counteroffenive that drove the exhausted German back across the Marne River, saving Paris and the French army from campture |
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| in Belgium, the small but gallant British Expeditionary Force lost 50,000 men in it courageous defense against the German onslaught |
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| deep ditches used in battle to cover against enemy gunfire |
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| stretched for 600 miles from the English channel to the Swiss Alps |
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| the Germans attempted to crack the French defenses with a furious assault upon this fortress city |
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| a General who vowed "They shall not pass!" |
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| British forces launched a massive offensive against the Germana at this place |
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