Earth Sciences 1086F/G Chapter Notes - Chapter Unit 3 Introduction: Magnesium, Igneous Rock
4 Jan 2021
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Document Summary
Divison of planets into terrestrial and gas giants is based on density (only) Four terrestrial planets are all close to the sun. Heat from the sun makes it impossible for them to be mainly ice. Solid, rocky surfaces of the terrestrial planets characterize them. Common composition: silicon (si), oxygen (o), aluminium (al), magnesium (mg), sulfur (s), and iron (fe) Basalt igneous rock, primary product of volcanic lava, fine grained, dark grey to black. Closer a planet is to the sun (massive gravitational attraction) the more it will be bombarded by. Most abundant rock type which is common to all of them asteroids and comets. As a result mercury is highly cratered. Venus and earth are about the same size and have nearly the same density. Earth is very geologically active which reworks the surface.
