AQA ecosystems

GCSE geography - the living world

the restless earth

crust  - outter layer of the earth, OCEANIC-thin, dense, 5km thick, CONTINENTAL- thick light rock, 20 and 60km thick.

mantle - hot lava, most of the earth is filled up with this

outer core - liquid

inner core - solid metal, very centre of the earth

techtonic plates - continental and oceanic, causes earthquakes and volcano eruptions

why do techtonic plates move? convection currents

plate boundarys, destructive, constructive, conservative.

composite cone volcanos - destructive

shield volcanos - constructive.

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this isn't ecosystems

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