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Chapter 2: Types of Rocks
Metamorphic, Igneous, and Sedimentary rocks.
12
Science
8th Grade
10/21/2012

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Term
METAMORPHIC ROCKS
Definition
Exposed to high pressure --> it's form changes
Term
FOLIATED METAMORPHIC ROCKS
Definition
Forms when pressure causes the rock to form in parallel bands
Term
NONFOLIATED METAMORPHIC ROCKS
Definition
Forms when pressure forms rocks that do not have mineral grains or parallel bands.
Term
IGNEOUS ROCKS
Definition
Forms when hot, liquid magma cools into solid rock
Term
INTRUSIVE IGNEOUS ROCK
Definition
Cools inside Earth (at a slower rate than EXTRUSIVE IGNEOUS ROCK)
Term
EXTRUSIVE IGNEOUS ROCK
Definition
Cools on Earth's surface (at a faster rate than INTRUSIVE IGNEOUS ROCK)
Term
SEDIMENTARY ROCKS
Definition
At or near the surface of Earth, weathering, erosion, deposition, burial, and cementation takes place.
Term
CLASTIC SEDIMENTARY ROCK
Definition
Forms when sediments are buried, compacted, or cemented together by calcite or quarts.
Term
CHEMICAL SEDIMENTARY ROCK
Definition
Forms when sea water evaporates
Term
ORGANIC SEDIMENTARY ROCK
Definition
Forms from the remains/fossils of once-living plants or animals.
Term
ROCKS
Definition
A combination of one or more minerals or organic matter
Term
TEXTURE OF ROCKS
Definition
Fine grained (small pieces), Medium grained (in between), or Coarse grained (large pieces).
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