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Rocks
Rocks of Earth
10
Science
6th Grade
02/15/2012

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Term
Rock
Definition
The material that forms Earth’s hard surface.
Term
Organic
Definition
Alive, grows.
Term
Texture
Definition
The size, shape, and pattern of a rock’s grains.
Term
Grain
Definition
A particle of mineral or other rock that gives a rock its texture.
Term
Composition
Definition
The act of combining parts or elements to form a whole.
Term
Intrusive
Definition
Igneous rock that forms when magma hardens beneath Earth’s surface.
Term
Extrusive
Definition
Igneous rock that forms from lava on Earth’s surface.
Term
Clastic
Definition
 Breaking up into fragments or separate portions; dividing into parts.
Term
Cementation
Definition
 The heating of two substances in contact in order to effect some change in one of them.
Term
Rock Cycle
Definition
A series of processes on the surface and inside earth that slowly changes rocks from one kind to another.
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