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Rocks
Vocabulary words related to rocks
10
Science
6th Grade
02/15/2012

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Term
Rock
Definition
The material with which Earth's crust is comprised that was once live organisms.
Term
Organic
Definition
Derived from living organisms.
Term
Texture
Definition
A quality describing how the grains of a rock are organized to make the rock.
Term
Grains
Definition
Minute pieces of minerals and other rocks that comprises a rock and creates its texture.
Term
Composition
Definition
The makeup of the rock; the minerals and other rocks contained in a rock. Smaller mineral crystals can be found by observing a "thin slice" under a microsocpe.
Term
Intrusive
Definition
A term describing igneous rocks that are formed underneath the crust.
Term
Extrusive
Definition
A term decribing igneous rocks that are formed by magma that cools on the crust.
Term
Compaction
Definition
A way sedimentary rocks are created: the process in which sediment deeper in the crust is under high pressure from sediment above it and is "pressed" into a sedimentary rock.
Term
Cementation
Definition
A way sedimentary rocks are formed: this process "glues" the rock together with a naturally occuring "cement." This is sometimes caused when sediment is dissolved in water.
Term
Clastic
Definition
A specific type of sedimentary rock that is comprised of large pieces or rock and mineral cemented together.
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