structure of the earth

steph_narciso
Flashcards by steph_narciso, updated more than 1 year ago
steph_narciso
Created by steph_narciso over 7 years ago
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Geography A2 Plate Tectonic theory section1

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Question Answer
what does the inner core consist of? it is solid and consist of iron & nickel
what is the density of the inner core? Density of about 13.6g/cm3 and it is 5 times denser than the surface rocks.
what is the outer core? it is liquid , comprising mostly iron
what is the density of the outer core? it has a density of 10-12g/cm3
'the outer core is responsible for the..' earths magnetic field
'the mantle is... solid, containing lower density material , peridotite formed of silicate minerals
how thick is the mantle? 2900km
what is the crust made out of? it is solid and divided into two main types OCEANIC and CONTINENTAL
the depth of the crust varies between.. 6km-70km
the average density of the crust .. 3g/cm3
the mantle and crust are divided into what sections? lithosphere asthenosphere mesophere
where is the lithosphere the crust and upper section of the mantle
asthenosphere is .. the upper part of the mantle that is molten
mesosphere is.. the lower part of the mantle(solid)
what are the characteristics of continental crust thickness-30-70km denisity-2.7g/cm3 rock type-granite mineral content- silica&aluminium (SIAL)
what are the characteristics of the oceanic plate? thickness-5-9km density-3.0g/cm3 rock type-basalt m.content- silica&magnesium (SIMA)
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