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Geochemistry (Formation of the earth (supported by 2 observations- (Rocky…
Geochemistry
Formation of the earth
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Further away, solar winds had less impact on lighter elements, allowing them to coalesce into gas giants
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gravity collapsed the solar nebula in on itself and began to spin, forming the sun at the centre of the nebula
core first formed as heavy matter sank to the centre, while lighter matter created the crust
leaving only heavy, rock materials to create smaller terrestrial worlds like earth
planet magnetic field formed around this time and gravity captures some of the gasses that made up the early atmosphere
early in evolution, earth suffered an impact by large body that catapulted pieces of the planet into space
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planet in Goldilocks zone, water remained at surface and enabled life to evelove
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collisions and friction gave rise to mountains and volcanoes, which released gasses into atmosphere
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Goldschmidt system
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he suggested
when earth was molten the various elements and compounds separated due to different densities. heavy elements sank to form the core and mantle, lighter elements floated up and formed the crust. the atmosphere and hydrosphere formesd later
meteorites
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iron meteorites= younger
composed of iron and nickel, thought to be fragments of metallic core of larger asteroids that underwent an element differentiation during molten phase