GEOL 306 Lecture Notes - Lecture 2: Paleomagnetism, The Crust, Arizona Transition Zone
7 Feb 2018
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Elements: atoms, one of the smallest pieces that we can split matter into, different elements have different properties. About 90 elements occur naturally on earth. Minerals: collection of one or more elements that are stacked neatly together in a form called a crystal structure. More than 5,300 different species with different physical properties. Rocks: composed of one or more minerals. Color can indicate which minerals are included. 1 sun that is 4. 57 billion years old, 1. 3million times bigger than. 75% h, 25% he, 5,700 k at surface, 15 million k at core. 4 telluric/terrestrial/rocky planets (mercury, venus, earth, mars) 4. 5-4. 54 billion years, made of metal or silicate rocks, average density 3. 8-5. 4 cm3. Made of hydrogen and helium, . 7-1. 6cm3 density. 5 dwarf planets, more than 180 moons, asteroids, and comets. 150 million km from the sun (3rd planet) Heaviest elements (fe, o, si, c) formed by fusion. By collision, dust and gas formed particles that grew bigger, forming planetesimals.
