GLG 111 Lecture Notes - Lecture 1: Outer Core, Nebular Hypothesis, Star Formation
Document Summary
Used by scientists to test their hypothesis and validate their observations about the natural world. The science that pursues the understanding of the earth. States that the physical, chemical, and biological laws . An incomprehensible explosion that sent all matter of the universe flying outward. First elements to form were hydrogen and helium. Over billions of years, this debris began to cool and formed into large bodies (galaxies, etc) Within galaxies, concentrations of gas, dust, and elements form nebulae. Proposes that all bodies in our solar system evolved from an enormous . Contraction of nebula forms planetesimals (0. 1 to 10 km) Planetesimals continue to grow (>10"s km) . The earth"s interior is characterized by a gradual increase in t and p. This changes the physical and chemical environment in which the rocks are found. Dense materials sink, less dense materials float. P waves = can pass through solids and liquids. S waves = can pass only through solids.
