struct&materials

struct&materials - Earth Struct Materials Page 1 of 17...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
This page last updated on 16-Jan-2006 EENS 204 Natural Disasters Tulane University Prof. Stephen A. Nelson Earth Structure, Materials, Systems, and Cycles The Earth in the Solar System The Solar System z The Earth is one of nine planets in the solar system z In addition to the planets, many smaller bodies called asteroids, comets, meteoroids are present. z All objects in the solar system orbit around the Sun. z The four planets closest to the Sun (Mercury, Venus, Earth, and Mars) have high densities because they are mostly composed of rock, and are called the Terrestrial Planets. z The five planets outside the orbit of Mars (Jupiter, Saturn, Uranus, Neptune, and Pluto) have low densities because they mostly composed of gases, and are called the Jovian Planets. Origin of the Solar System z Original Solar Nebula z Condensation of the Sun about 6 billion years ago z Condensation of the Planets about 4.5 billion years ago. z Process is continuing today, although at a much slower rate. Page 1 of 17 Earth Struct & Materials 1/16/2006
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon