815105
Description
Mind Map by alison.mehew, updated more than 1 year ago
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Created by alison.mehew
over 10 years ago
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Plate Tectonics
- Earth Structure
- the crust
- thinnest,
coolest and
less dense
layer
- varies in
thickness from 5
to 70km down
- rocks rich in
silicon,
oxygen,
aluminium,
potassium
and sodium
- thinnest,
coolest and
less dense
layer
- the core
- starts about
2900km down
- most dense part of the planet
- made up of
rocks rich in
iron and
nickle
- temperature
over 6000oC
- centre is 6350km down
- starts about
2900km down
- the mantle
- the crust
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