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Science

Terms

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igneous rock
a type of rock that forms from the cooling of molten lava at or below the surface
metamorphic rock
a type of rock that is changed by heat pressure or chemical reactions
rock cycle
a series of processes on hte surface and inside earht that slowly change rocks from one kind to another
porphyritic texture
an igneous rock texture in which large crystals are scattered in the background of much larger crystals
cementation
the process by which dissolved minerals crytaliza and glue particles of sediment together in one mass
sedimentary rock
a type of rock that forms when particles from other rocks or the remains of plants and animals are pressed an cemented together
erosion
the destructive process in ehich water or wind loosen and carry away fragments of rock
atoll
a ring shaped coral island found far from land
sediment
small solid pieces of material that comes from rocks or organisms
clastic rock
sedimentary rock that forms when rock fragments are squezed together under high pressure
texture
the look and feel of a rocks surface
compaction
the process by which sediments are pressed together under their own weight
organic rock
sedimentary rock that forms where remains of organisms are deposied in thick layers
chemical rock
sedimentary rock that forms when minerals crystalize from a solution
grain
a particle of mineral or other rock that gives a rock its texture
foliated
term used to describe the metamorphic rocks whos grains are arranged in parralel layers or bands
deposition
the process by which the sediment settles out of the water and wind that is carrying it
extrusive rock
igneous rock that forms from lava on earths srface
coral reef
a structure of calcite skeletons built up by coral animals in warm shallow water
intrusive rock
igneous rock that forms when magma hardens beneath earths surface

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