ERTH 2403 Lecture Notes - Lecture 1: Geochronology, Supernova Remnant
Document Summary
Erth 2403 introduction to oceanography lecture 1. Textbook: oceanography by tom garrison 8e or 9e. Exam #2: march 12, 2015 4:00pm to 6:00pm. On our planet the condition necessary for a large permanent ocean to exit are: earth is large enough that its gravity will keep the atmosphere and the ocean from drifting into the space. Its surrounding is calm and stable (no radiation from the supernova) 2: earth"s distance from the sun is right for its surface water to exist in the liquid state: The sun and its planet form the solar system. The solar system (solar nebula): formed 5 billion years ago: Solar nebula: cloud of gas and dust (75% h, 23% he, 2% dust, ice and heavier elements) The condensation theory explains how stars and planets are believed to form. By about 5 billion years ago, a solar nebula: rotating disk-shaped mass of clouds of gas and dust formed.