EARTHSC 1121 Study Guide - Midterm Guide: Atlantic Ocean, Partial Melting, Magnesium
5 Oct 2018
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Lecture 1 intro: earth science is super cool(cid:45) Potential: conservative property of mass and energy, force, contact or mechanical vs. On the time scale of one year (observed at the same time each day)retrograde motion, planets (mars in this case) move across the sky, from west to east, relative to the stars. At some point, they temporarily appear to change direction, and then resume their motion. Hypothesized a geocentric system which explained the retrograde motion of the planets by placing them on epicycles (small circles on bigger ones) Observation: 1000 years of observations of planetary motions, ptolmaic model was noticeably inaccurate, requiring complex corrections, hypothesis: heliocentric model is more simple and possibly more accurate. , assumption: circular orbits. Two laws: planets move in elliptical orbits with the sun as one of the foci, a planet sweeps out equal areas in equal time. Copernicus developed the geocentric model assuming circular orbits. Brahe made the observations that allowed kepler to develop kepler"s.
