OCS 1005 : Oceanography Exam I Study Guide
15 Mar 2019
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Oceanography exam i study guide: milky way galaxy- one of 10^9 galaxies in universe. Our sun is one of about 10^11 stars in it: nebula- cloud of gases and space dust. Mainly hydrogen and helium: star dust- stars are gas and debris. Convert hydrogen atoms into carbon and oxygen atoms: density- mass over volume. Water is 1 g/cm^3: density stratification- gravity pulls iron to the center, lighter minerals migrate to surface, core- iron and nitrogen. Solid inner core, liquid outer core: mantle- iron, manganese and silver. Continental crust is thicker: lithosphere- cool, rigid outer layer, asthenosphere- hot partially melted layer, flows slowly, mesosphere- rigid layer of mantle, outer core- dense, liquid layer, extremely hot. Inner core- solid, very dense and extremely hot. Pacific ocean: polynesians- settled hawaiian islands, library of alexandria- egypt. 15 degrees every hour: chronometer- first clock. John harrison: hms challenger- first oceanic expedition for scientific research, hms beagle- charles darwin.
