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Earth Science
Earth's Structure
12
Science
7th Grade
01/24/2010

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Term

 

crust

 

Definition
the rigid, rocky outer layer of the Earth , composed of mostly basalt and granite, it is thinner and under the oceans
Term
inner core
Definition
the solid iron-nickel center of the Earth that is very hot and under great pressure 
Term
mantle
Definition
a rocky layer located under the crust-it is composed of silicon, oxygen, magnesium, iron, aluminum, and calcium
Term
outer core
Definition
the molten iron-nickel layer that surrounds the inner core
Term
continental crust
Definition
the thick parts of the Earth's crust, not located under the oceans
Term
lithosphere
Definition
the crust plus the rigid, upper mantle
Term
lower mantle
Definition
the deepest parts of the mantle, just above the core
Term
mohorovicic discontinuity
Definition
separates the crust and the upper mantle
Term
ocean
Definition
large bodies of water sitting atop oceanic crust
Term
oceanic crust
Definition
thin parts of the Earth's crust located under the oceans
Term
upper mantle
Definition
the uppermost part of the mantle, part of the lithosphere
Term
asthenosphere
Definition
the lower part of the upper mantle that exhibits plastic(flowing) properties.
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