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Tectonics summary notes:

Structure of the earth:

Inner core-centre of the earth

Outer core



Tectonic plates:

The earth's crust is divided into 12 large sections called tectonic plates. There are two
types of plates-continental and oceanic. Continental plates contain the world's
landmasses. They are older, lighter and thicker…

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This diagram shows how a collision plate margin moves
and the tectonic plates move towards each other to
cause Fold Mountains.


This diagram shows how a constructive plate margin, the
plates move away from each other and cause volcanoes
and earthquakes.

Plate margins:

Margin Description Hazard or Example Case…

Page 3

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towards a Fold Eurasian Eruption of
continental mountains. plate. Mount
plate because Pinatubo.
the oceanic
plate is
heavier is sub
ducts under
Conservative Where two Earthquakes Juan de fuca California
plates slide plate and earthquake.
past each north
other. American
Collision Where two Fold Indo-Australia Construction…


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