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Earth was formed from dust in solar system
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Early earth = molten sphere
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As earth cooled, materials separated based on their masses
- Heavy sank lower
- Lighter floated up
- Gaseous became part of atm
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B/c earth is divided up into layers based on mass, if its cut, it is possible to see layers.
- The innermost layer = core
- The innermost zone of Earth’s interior, composed mostly of iron and nickel. Includes a liquid outer and solid inner layer.
- Above core is mantle
- Layer of earth above the core, containing magma
- Magma is molten rock
- Magma circulates in convection cells like the atmosphere
- Asthenosphere
- Layer of earth located in outer part of mantel
- Consists of semi molten rock
- Lithosphere
- Outermost layer of earth
- Includes mantel and crust
- Made up many large and small plates
- Overlie the convection currents in asthenosphere
- Crust
- Chemically distinct outermost layer of lithosphere
