Earth Sciences 1086F/G Lecture Notes - Lecture 3: Planetary System
14 May 2020
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Document Summary
Element: substance that can"t be broken down further by chemical means. Atom: particle matter has unique properties of element: all atoms consist of central nucleus that contain protons (pos) and neutrons (neutral/none, nucleus surrounded by electrons (neg) Ion: atom with either neg (extra electrons) or pos (deficient electrons) Pos combine with neg to form neutral compound. Isotope: atoms of the same element with diff amount of neutrons. Radioactivity: spontaneous breakdown of unstable atoms of an element with production of energy and other particles. Fission: breakdown of nucleus of relatively heavy atom into 2/lighter particles. Fusion: combination of 2 lighter atom/isotopes to make one heavier atom/isotope. Supernova: explosive death of massive star, bright effect can last for weeks. Collapse: pocket of cloud began to contract due to recoiling from shock wave produced by nearby supernova causing collapse there was increase in heat, eventually so dense that heat can"t escape.
