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Structure of the Earth

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Callum Findley

on 3 February 2013

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Transcript of Structure of the Earth

Inner Core Solid Metal - 5500 ºC Why is this not a liquid if it is hotter than the Outer Core? The Inner Core is under such immense pressure that it cannot expand into a liquid state. Outer Core Molten Metal - 4500ºC Made up of... Mainly Iron (Fe), Nickel (Ni), and Radioactive metals Movement of this layer creates Earth's Magnetic Field. This protects us from solar radiation; creates a protective bubble around the earth known as the magnetosphere; and enables our compasses to work in the outdoors. Mantle Molten Rock - 900ºC Location of Convection Currents driving plate movement Forms the majority of the Earth's Interior - 3000km thick Crust Two types of Crust Continental Crust 30 - 50 km thick
Made up of lighter igneous, sedimentary and metamorphic rocks Oceanic Crust 4 - 8 km thick
Comprised of dense basalt The Core Inner
Core Outer
Core Mantle Crust
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