Unit 1

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Continental crust is...?
Thick but has low density normally 35-70km thick granite rock
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Oceanic crust is...?
Thin but has high density normally 5-10km thick basaltic rock
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Temperatures in the mantle range from...?
900-4000'C
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Plate tectonics are caused by?
Radioactive decay in the core heating the mantle causing convection currents.
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On constructive plate boundaries you find....?
Shield volcanoes, basaltic magma, plates pull appart
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On destructive plate boundaries you find...?
Composite volcanoes, andesitic magma, subduction, highly eruptive volcanoes.
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On conservative plate boundaries you find...?
No volcanoes, earthquakes, plates sliding
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Volcano case studies
Constructive - North America and Eurasian plate(Iceland). Destructive - Eurasian and Pacific plate( Japan) Conservative - North American and Pacific plate( San andreas fault US)
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Other cards in this set

Card 2

Front

Oceanic crust is...?

Back

Thin but has high density normally 5-10km thick basaltic rock

Card 3

Front

Temperatures in the mantle range from...?

Back

Preview of the front of card 3

Card 4

Front

Plate tectonics are caused by?

Back

Preview of the front of card 4

Card 5

Front

On constructive plate boundaries you find....?

Back

Preview of the front of card 5
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