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Obsolete scientific theories

Bob Jones PPT Notes -- Chapter 4a

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Chemistry
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Bohr model
electron
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Proton
Atomic nucleus
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The Development of Atomic Models: A Historical Perspective 1 Model of an Atom An IDEA of what it looks like (a working representation) 2 Atomic Models Democritus? Idea An object CANNOT be divided indefinitely. There is a smallest particle. atom: (Gk. atomos?indivisible) 3 Democritus ? Chemistry textbook p. 73 (BJU Press) Atomic Models There is a basic unit of matter?the atom. Chemists found this out by looking at the mass ratio of substances. But the atom is NOT indivisible. Democritus? Idea was CORRECT! 4 Democritus ? Chemistry textbook p. 73 (BJU Press) Continuous: Matter can be subdivided forever. Particulate: A smallest particle exists. 2 Theories Atomic Models 9 grams of H2O: 8 grams of oxygen 1 gram of hydrogen Ratio is 8:1 Mass Ratio 90 grams of H2O:

Astronomy

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Science Notes Ancient Models of the World Egypt Thought world was flat Thought sky was a flat plate supported by mountains Thought the sun traveled along the Nile India Thought world was circular disk surrounded by and ocean Thought the center of the world was a mountain Thought the sun went around the mountain once a day In the nighttime it went behind the mountain and came out in the morning Greece Thought Earth floated in the ocean like a cork One man thought Earth was a cylinder with a rounded top that floated in the air Thought that beyond the sky was a region of fire The sun, stars, and moon were holes in the sky, through which the fire could be seen NOTE: All of these incorporate local features General Astronomy

Chapter 16 Speilvogel Notes

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European History
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Chapter 16: Toward a New Heaven and a New Earth: The Scientific Revolution and the Emergence of Modern Society Chapter Summary In the Scientific Revolution, Western Europe disproved the idea of a geocentric universe and of the old Ptolemaic-Aristotelian view of the world and a new conception of the universe was born. New conception: the sun at the center of the universe, planets as material bodies revolving around the sun in elliptical orbits, infinite rather than finite world. Nicolaus Copernicus: heliocentric universe; Johannes Kepler: elliptical orbits of planets; Galileo Galilei: observed moon and sunspots with telescope = discovered universe is composed of material substance; Isaac Newton: law of gravity.
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