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Rocks
Rocks and the Rock Cycle
17
Science
8th Grade
11/17/2013

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Term
basaltic
Definition
extrusive igneous rock, rich in iron and magnesium, that forms when lava cools on the surface of the earth.
Term
cementation
Definition
a process where sediments are glued together by minerals dissolved in a solution
Term
cogeneration
Definition
A coal-fired power generation plant that produces electricity and uses excess thermal energy to supply heat to surrounding community.
Term
compaction
Definition
a process that presses layers of sediment together so that the particles stick together forming a sedimentary rock.
Term
extrusive
Definition
a class of igneous rock where the molten material has a volcanic origin. cooling and crystallizing at the surface of the earth, with fine grains or glassy texture.
Term
foliated
Definition
a characteristic of metamorphic rock where the crystals are arranged in layers.
Term
granitic
Definition
intrusive igneous rock, rich in oxygen and silicon, that forms when magma cools below the surface of the earth.
Term
igneous rock
Definition
one of three major rock groups formed when molten material solidifies above or below the surface of the earth.
Term
intrusive
Definition
molten material of plutonic origin. cooling and crystallizing below the surface of the earth, usually with large grains.
Term
lava
Definition
molten rock material that has exited the earth due to volcanism.
Term
metamorphic rock
Definition
one of three major rock groups that formed when a sedimentary, igneous or other metamorphic rock is changed by heat and/or pressure.
Term
non-foliated
Definition
a characteristic of metamorphic rock where crystals or grains have no layers or regular arrangement. Massive texture.
Term
rock
Definition
a mixture of one or more minerals, organic matter, or natural glass that has formed together.
Term
rock cycle
Definition
the natural processes that form and change rocks from one type to another.
Term
sediment
Definition
fragments of rocks, minerals, plants, and animals that have been transported by erosion.
Term
sedimentary rock
Definition
one of the major groups of rocks. formed when particles of other rocks, plants, and animals have been lithified.
Term
waste coal
Definition
a form of low-grade coal piled up near old coal mines
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