EOSC 326 Study Guide - Midterm Guide: Zircon, Lithosphere, Thermosphere

• School: UBC
• Department: Earth and Ocean Sciences
• Course: EOSC 326
• Professor: Louise Longridge

Document Summary

8 major planets rotate in: plane of the ecliptic, orbit sun"s rotation in counter clock wise. 1. 2 nebular hypothesis (solar nebular disk model sndm) Temperature and pressure increase in center of cloud which forms a hot embryonic or proto sun. In accretion phase, small dust grain composed of rocky materials and ice start to clump together forming small planetesimals, which eventually become a planet. After about a billion years, inner planets undergo massive collisions and formed terrestrial planets. Jovian planets exist beyond snow line. (lower density: formation of earth. As this material decayed, it generated heat like a nuclear power station. The rock pile then melted and the result is differentiated or layered earth. Earth layers: inner core (solid iron, outer core (liquid iron, mantle, asthenosphere, lithosphere (upper mantle, lower atmosphere (troposphere, stratosphere, mesosphere, thermosphere. Oldest rock is thought to be 4 ga. Oldest material is zircon (about 4. 4 ga)