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1-2. FORMATION & EVOLUTION OF The Earth

1-2. FORMATION & EVOLUTION OF The Earth. http://www.astexhibits.com/earth-day-4222013-is-almost-here/. The Physical Characteristics of the Earth Distance to the SUN: 149,6000,000 km Diameter: 12,756 km Mass: 5.98*10 27 g Density: 2-3g /cm3 (Crust), 5.52g/ cm3 (B ulk)

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1-2. FORMATION & EVOLUTION OF The Earth

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  1. 1-2. FORMATION & EVOLUTION OF The Earth http://www.astexhibits.com/earth-day-4222013-is-almost-here/

  2. The Physical Characteristics of the • Earth • Distance to the SUN: 149,6000,000 km • Diameter: 12,756 km • Mass: 5.98*1027 g • Density: 2-3g /cm3 (Crust), 5.52g/cm3 (Bulk) • Elemental abundance: • Bulk: Fe > O > Si > Mg > Ni > Ca > Al > S • Crust: O > Si > Al > Fe > Ca > Na > K > Mg • Atmosphere: N > O > Ar > C > H

  3. Internal structure of the Earth. http://www.ucl.ac.uk/EarthSci/people/lidunka/GEOL2014/Geophysics7%20-%20Deep%20Earth/Earth%20Structure.htm

  4. Key Questions • How did it start to aggregate? • What were the heat sources for the reconstitution (to have such an concentric internal structure)? • Where did the atmosphere and water (volatiles) come from? • How did the life begin and bring the changes of the environment?

  5. Formation & Evolution of the Earth http://ay201b.files.wordpress.com/2011/04/proplyd_concept.jpg

  6. http://sciexplorer.blogspot.kr/2011/03/earth.html

  7. Collison between Theia & Protoearth

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