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Rocks and Minerals

TermDefinition
Mineralogy the study of crystal structure, chemistry, and the properties of minerals
Minerals a naturally occurring inorganic substance with a chemical composition. It has been formed by geological processes.
luster the way light interacts with the surface of a mineral, crystal, or rock
cleavage A sharp division or split. A mineral or rock has cleavage planes where the rock will tend to split.
density The compactness of a substance. In physics, density is measured by mass over volume.
Mohs Scale A scale used to measure the hardness of minerals.
streak the color of the mineral’s powder (using a streak test)
sedimentary rocks rocks that are made from other materials like sand or shells. The layers gather and over time, turn into rock.
igneous rocks molten or magma rocks that cool quickly while underground.
metamorphic rocks rocks that have been changed over time by heat or pressure, used to be igneous or sedimentary.
sediments matter that is deposited as a layer of solid particles on the bottom of a body of water.
Created by: mrstwilliams
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