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extrusive

these types of igneous rocks are formed as lava cools on the surface of Earth

density

mass per unit volume

streak

the color of a mineral in powdered form

luster

The way a mineral reflects light

intrusive

a type of ingneous rock that generally contains large crystals and forms when magma cools slowly beneath Earth's surface.

cleavage

the tendency of a mineral to break along flat surfaces

fracture

the tendency of a mineral to break along curved or irregular surfaces

foliated

Term used to describe metamorphic rocks whose grains are arranged in parallel layers or bands.

non-foliated

the metamorphic rock texture in which mineral grains are not arranged in planes or bands.

chemical

a type of sedimentary rock that form when dissolved minerals come out of solution

mineral

solid homogeneous inorganic substances occurring in nature having a definite chemical composition

rock

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

igneous

rock formed from cooled magma or lava

sedimentary

rock formed when layers of sediments were pressed and cemented together

organic

sedimentary rocks made of material created by living things

clastic

sedimentary rock that forms when rock fragments are squeezed together

metamorphic

Rocks changed by intense heat or extreme pressure

sediment

solid rock or mineral fragments

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