GEOL 1001 Lecture : Geology Notes
Document Summary
Cosmology the scientific study of the universe: according to the geocentric model, earth lies at the center of the universe, a light year represents, the distance light travels in 1 year. Big bang nucleosynthesis formed the lighter elements(atomic elements#<5) 1/18/13: accumulations of dust and ice into masses that range from basketball sized to a few kilometers across are , planetesimals, we are all made of stardust, true. Earth"s magnetism forms shield around earth(magnetosphere) which protects us from cosmic radiation and solar wind. Atmospheric layers have distinct characteristics: the earth produces a that shields the planet from, magnetic field/solar wind, the dominant gas in the atmosphere is, nitrogen, the density of the atmosphere _______ with increasing elevation, decreases. 91. 2% of earth"s mass comprised of: iron, oxygen, silicon, magnesium. Rocks aggregates of minerals, grains, and/or glass. Sediment an accumulation of loose mineral grains. Melts: magma molten rock beneath the surface, lava molten rock at the surface.
