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AP Environmental Science
n/a
9
Environmental Studies
11th Grade
05/10/2010

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Term
Core
Definition
Very dense, hot metal; mostly iron and nickel, makes up 32% of earths mass but only 16% of its volume
Term
Inner Core
Definition
Solid, high pressure over-rules high temperature, densest part of earth
Term
Outer Core
Definition
High temperatures make iron molten, circulation of molten earth's magnetic field
Term
Planetary Differentiation
Definition
As earth formed dense materials sank toward center of Earth while less dense materials rose developing into layers
Term
Monorovici Discontinuity
Definition
Usually referred to as the Mono, boundary between Earth's crust and the mantle, separates crust and the mantle, separates crust from mantle
Term
Mantle
Definition
Dense, hot, pliable layer of rock, less dense then core because has elements like oxygen, silicon, magnesium, iron, aluminum; most of earth's mass, mostly dense
Term
Crust
Definition
Makes up .5% of Earth's total mass
Term
Oceanic Crust
Definition
Composition of iron, magnesium, and silicon, basalt-rich oceanic crust
Term
Continental Crust
Definition
Thicker and lighter, composition of calcium, sodium, potassium, and aluminum; much thicker, expands down 20-30 miles, appears layered and becomes denser with depth
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