Minerals and Rocks

13 terms by lauriep 

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cleavage

the tendency of a mineral to break along flat surfaces

crystal

a solid in which the atoms are arranged in a pattern that repeats again and again

fracture

the tendency of a mineral to break apart in an irregular way

hardness

a measure of how easily a mineral can be scratched

luster

the way a mineral reflects light

mineral

a solid inorganic substance occurring in nature having a definite chemical composition

rock

a naturally occurring solid mixture of one or more minerals or organic matter

streak

the color of the powder left when a mineral is rubbed against a hard rough surface

magma

molten rock beneath the earth's surface

specific gravity

ratio of a mineral's weight compared with the weight of an equal volume of water

igneous rock

produced by fire, great heat, or the action of a volcano; formed by the cooling and solidification of magma.

sedimentary rock

a type of rock that form from particles of other rocks or the remains of plants and animals under intense pressure and are then cemented together

metamorphic rock

A type of rock that forms from an existing rock that is changed by heat, moisture and pressure

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