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Minerals Only (Unit 2, part 1)

mineral A substance that forms in nature, is a solid, is inorganic, has a definite chemical make up and a crystal structure.
element A substance that contains only one type of atom.
crystal A solid in which the atoms are arranged in an orderly and repeating pattern.
streak The powder left behind from a mineral as it is scraped along a streak plate.
luster The way in which light reflects from a mineral's surface.
cleavage The tendency of a mineral to break along flat surfaces.
fracture The tendency of a mineral to break into irregular pieces.
hardness A mineral's resistance to being scratched.
magma Molten rock beneath the planet's crust.
lava Molten rock that has reached the planet's surface.
silicates A mineral group that makes up about 90% of the rocks in earths crust. (composed of the elements silicon and oxygen)
Created by: lcrowe
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