Class07

Class07 - Chemistry 83 Origins and Nature of Components of...

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Chemistry 83 Class07 1 Origins and Nature of Components of Earth ʼ s Second Atmosphere Buell/Girard, “Chemistry”, Prentice Hall, New Jersey, 1994, p. 37 Earth’s surface fractured to form tectonic plates
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Chemistry 83 Class07 2 Convection currents move plates http://www.geog.ouc.bc.ca/physgeog/contents/10i.html Plate motion has major natural consequences Divergent Convergent Transform Thompson, Turk,”Earth Science and Environment”,Saunders,New York, 1995, 19 http://www.extremescience.com/ PlateTectonicsmap.htm
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Chemistry 83 Class07 3 http://www.uwsp.edu/geo/faculty/ozsvath/lectures/Plate_Tectonics.htm Convergent subduction causes volcanoes that release internal pressure by blowing gases and solids into the atmosphere Mt. Pinatubo in the Philippines erupted in 1991, releasing molten lava, and spewing millions of tons of gases, hundreds of millions of tons of ash and rocks, as high as 40 km (25 miles) into the atmosphere. Cunningham/Saigo, “Environmental Science, McGraw Hill, New York, 2001, p. 369
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Chemistry 83 Class07 4 Volcanic gases became components of earth’s second atmosphere Second Atmosphere Sources: 1) Gases from Big Burp, 2) Collisions with space objects (comets - mostly water) and 3) Gases from volcanic activity Major: NH 3 , CH 4 , and H 2 O Minor: H
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This note was uploaded on 10/19/2011 for the course CHEM 83 taught by Professor Bonk,j during the Fall '08 term at Duke.

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Class07 - Chemistry 83 Origins and Nature of Components of...

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