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Democritus, Aristotle, and John Dalton

Democritus, Aristotle, and John Dalton. Keith Casserino Kyle Connolly Tim Dean Anthony Lapila Nathan Strazulla Andrew Thurston. Democritus (460-370 B.C.). Student of Leucippus for pre-Socratic philosophy Studied math, metaphysics, and astronomy

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Democritus, Aristotle, and John Dalton

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  1. Democritus, Aristotle, and John Dalton Keith Casserino Kyle Connolly Tim Dean Anthony Lapila Nathan Strazulla Andrew Thurston

  2. Democritus(460-370 B.C.) • Student of Leucippus for pre-Socratic philosophy • Studied math, metaphysics, and astronomy • First to propose idea of tiny matter that wasn’t divisible • Tiny matter called atoms or atomos in Greek • Believed matter cannot be created, or destroyed • Different atoms  different sizes and shapes • People criticized theories because there was no proof

  3. ARISTOTLE (384-322 B.C.) Greek philosopher Born in Stageira, Chalcidice Believed empty space didn’t exist and matter was composed of wind, water, fire, and air. Aristotle’s theories were ideas, not necessarily science-related. Aristotle’s theories disagreed with Democritus’. One of the most influential scientists of his time, notions about atoms not existing were believed for about 2,000 years before disproved. Believed that the universe went from one side to another. One side, was form without matter, the other side, was matter without form.

  4. School teacher from England Meteorologist Ideas supported Democritus Proposed Atomic Theory in 1803 Observed many chemical reactions Determined mass ratios of the elements involved in those reactions 5 main points of Dalton’s Theory: Elements are made of atoms All atoms of the same element are identical Atoms of one elements are different from atoms of another Atoms of different elements combine to form compounds Atoms cannot be created, destroyed, or divided in the chemical process John Dalton(1766-1844)

  5. Dalton’s Theory • 1 oxygen (element) combines with 2 hydrogen (element) to form 1 water molecule (compound) • This supports Dalton’s Atomic Theory

  6. Citations • Buthelezi, Thandi, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom, and Dinah Zike. Chemistry Matter and Change. New York: Glencoe, 2008. • "John Dalton." Wikepedia. 19 Oct. 2007. Wikepedia. 24 Oct. 2007 <http://en.wikipedia.org/wiki/John_Dalton>. • "Democritus." 20 Oct. 2007. Wikepedia. 24 Oct. 2007 <http://en.wikipedia.org/wiki/Democratus>. • Weisstein, Eric W. "John Dalton." Wolfram Research. 2007. 22 Oct 2007 <http://scienceworld.wolfram.com/biography/Dalton.html>. • Image- Google Images-http://www.uh.edu/engines/earthairfirewater.jpg

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