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Rocks and Minerals

TermDefinition
cleavage the property of splitting evenly along flat surfaces
streak the line of powder obtained by scratching a mineral or rubbing it upon a hard, rough white surface
luster the state or quality of shining by reflecting light; glitter, sparkle, sheen, or gloss
fracture how a mineral brakes apart when it does not split evenly
Mohs hardness scale a ranking of minerals from softest to hardest
crystal the repeating pattern of a minerals partials in a solid
element a substance composed of a single kind of atom
hardness relative ability of a solid to resist scratching
crystallization the process by which atoms are arranged to form a material with a crystal structure
solution a mixture in which one substance dissolves in another
vein a narrow or slab of a mineral that is much different from the surrounding rock
geode a rounded, hollow rock that is often lined with mineral crystals
compound a substance formed when two or more elements combine and lose their distinct properties
inorganic something that doesn't come from a living thing
florence how a minerals glows under a ultraviolet (black) light
texture the look and feel of the rocks surface
fine grained grains that are very tiny
coarse grained grains that are large and easy to see
porphgry a rock with a large crystals surrounded by small crystals
intrusive igneous rock formed when magma hardened beneath earth surface
extrusive igneous rock formed from lava that erupted onto earths surface
sedimentary rock one of the three main rock groups that is formed by a series of processes
compaction the process that presses sediment together
erosion occurs when running water, wind, or ice loosen and carry away fragments of rock
cementation the process in which dissolved minerals crystallize and glue partials together
deposition the process by which sediment settles out of wind or water
clastic rocks sedimentary rock that forms when rock fragments are squeezed together
chemical rocks sedimentary rock that forms when minerals dissolve in a solution crystallize
organic rocks forms where remains of plants and animals are deposited into thick layers
compaction the process in which thick layers of sediment press down on the layers beneath them
foliated rocks metamorphic rocks with grains arranged in parallel layers or bands
nonfoliated rocks metamorphic rocks with grains arranged randomly
Created by: 1961845308
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