Class06

Class06 - Formation of the solar system and description of...

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Formation of the solar system and description of planet earth
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Cloud of dust and gas Gravitational Contraction Rotation and disk formation Break up into protosun orbited by protoplanets Solar fusion begins and drives H and He outward Thompson, Turk,”Earth Science and Environment”,Saunders,New York, 1995, 14 How did our solar system form ( one hypothesis)?
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Buell/Girard, “Chemistry”, Prentice Hall, New Jersey, 1994, p. 28 Terrestrial Planets (rocky) Giant Planets (gaseous) The location of Pluto is unusual since it is not with the other terrestrial planets near the sun. What is unusual about Pluto’s location? rocky
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http://www.meta-synthesis.com/webbook/32_n-synth/nucleosynthesis.html The sun is very large compared to all the planets around it The gaseous planets are large compared to the rocky planets Pluto is the smallest of the rocky planets What is unusual about Pluto’s size?
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Buell/Girard, “Chemistry”, Prentice Hall, New Jersey, 1994, p. 28 Pluto orbits in a different plane from the rest of the planets. Pluto was demoted to status of dwarf planet by International Astronomical Union on 8/24/06. What is unusual about Pluto’s orbit around the sun?
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Buell/Girard, “Chemistry”, Prentice Hall, New Jersey, 1994, p. 31 What is the structure of planet earth? Earth consists of layers with lower boundaries: Crust ~25 miles Mantle ~1800 miles Outer core ~3200 miles Inner core ~4000 miles
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Moeller, “Chemistry”,Academic Press, New York, 1984, 929 Layers suggest that earth melted after it is was formed and its molten components differentiated, i.e., gravity formed layers based on density How can earth’s structure be explained?
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What layer of earth contains most of the iron metal? Metals in the core produce a giant magnet that redirects incoming radiation from outer space to the poles. Later we will see that this protected early life forms from exposure to killing radiation. http://sprg.ssl.berkeley.edu/PolarCusp/mission/earth-magnet.gif
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Metals and non-metals occur mostly as ionic substances. The crust (lithosphere) is composed of the less-dense ionic substances. Buell/Girard, Chemistry, 2nd, Jones and Bartlett,MA,2003,29 (Lithosphere) What layer of earth contains the less dense ionic substances?
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What observation has lead to a hypothesis on the origin of our moon? Observation: com-
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Class06 - Formation of the solar system and description of...

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