GEOL 1001 : Geology 1001 Henry Exams 1-2
Document Summary
Heating and differentiation of the earth: accretion (kinetic energy addition, compression (gravitational and kinetic energy addition, radioactive elements (spontaneous decay releases heat)-long-lived heating effect. The earth system: the earth system relates to the interactions of all of the geosystems, the climate system: and ground-waters to an altitude of about 100 km. Cryosphere: polar ice caps, glacers, and other surface ice and snow. Atmosphere: gaseous envelope extending from the earth"s surface. Biosphere: all organic matter related to life near earth"s surface. Convection causes hot water to rise, where it cools, moves laterally, sinks, warms, and rises again. 2 ma first appearance of our species, homo sapiens: possible events. Alternate early earth scenarios: moon-forming impactor (approx. From perpendicular to ecliptor, 90 degree change, gave us seasonal changes: magma vs. watery oceans (approx. 4. 4-4. 0 ga: detrital zircons from a conglomerate at jack hills, australia (4. 4 billion years) Chapter 2- plate tectonics: the unifying theory in the geosciences:
