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5 Cards in this Set
- Front
- Back
Properties of Oceanic Crust |
5-10 km thick Denser Newer Thinner Heavier Destroyed at destructive plate margins Forms at constructive plate margins Subducts at continental plate boundary
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Properties of Continental Crust |
Older Thicker Less dense Lighter 25-100km thick Doesnt subduct Cannot be destroyed New crust isnt formed |
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Types of plate boundaries |
Constructive - where the plates are moving apart Conservative - where the plates slide past each other Destructive - where the plates collide ( also collision zones are a type of these) |
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Structure of the Earth |
Solid inner core Outer core (liquid iron and nickel) Mantle (soft molten rock) Crust (hard outer shell) |
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How do plates move? |
Convection currents in the mantle |