Download The Earth`s Structure

A Journey from the Inside Out:
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Introduction:
The Earth’s layered
structure is the result
of three factors
affecting different
Earth substances.
temperature
pressure
density
A Journey from the Inside Out:
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Inner Core:
Solid metals (Nickel
and Iron)
Very hot (7500oC)
Under intense
pressure
2400 km in diameter.
A Journey from the Inside Out:
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Outer Core:
Liquid metals
Hot but cooler than
the inner core
(4400-6100oC)
Under less pressure
2300 km thick
Creates Earth’s
magnetic field.
A Journey from the Inside Out:
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Mantle:
Hot liquid rock (rich
in iron, magnesium
and calcium)
Less dense than the
inner and outer
cores
2900 km thick.
A Journey from the Inside Out:
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Asthenosphere:
Layer of hot soft rock
Found in the upper
mantle
Moves like a thick
paste.
A Journey from the Inside Out:
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Lithosphere:
Most rigid earth layer
Crust + upper mantle
Sits on top of the
asthenosphere.
A Journey from the Inside Out:
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Crust:
Thin layer of cool
rock (6-70 km)
Least dense layer
Two types:
continental (granite)
oceanic (basalt).