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Moving Tectonic Plates
Crust- Made from thin layers
of tectonic plates.
Mantle- Divided into a solid upper
part & a semi-liquid lower part,
which can flow
Core- Consists of a liquid
outer core & solid inner core.…read more

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Convection Current
1) The core heats the molten rock in
the mantle to create a convection
current.
2) Heated rock from the mantle rises
to the earths surface.
3) At the surface the convection
current moves the tectonic plates
in the curst.
4) Molten rock cools & flows
back to the core to be reheated.…read more

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Volcanic & Earthquake Hazards
75,000 dead & 75,000 2.8 million Up to 12,000 homeless
homeless 3757 injured
injured
Earthquake Earthquake
63 dead
in Kashmir in California
2005 1989
Remote Property damage Built up, Property
mountainous accessible area damage $10
$440 million
area billion…read more

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Volcanoes
Shield Volcanoes Composite Volcanoes
-Are found on constructive plate boundaries. -Are found on destructive plate boundaries.
- Are formed by eruptions of thin, runny lava -Are formed by eruption of viscous, sticky lava
which flows along way before it solidifies. & ash that doesn't flow far.
-Have gently sloping sides & a wide base. -Have steep sloping sides & a narrow base.
-Contain basaltic magma which is very hot -Made up of layers of thick lava & ash.
with low silica & gas content.
-Contain andesitic magma which is less hot
-Erupt frequently but not violently. but contains lots of silica & gas.
-Erupt infrequently but violently, including
pyroclastic flows.…read more

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