rock unit 8C

igneous rock
rock that forms when melted (molten) rock from Earth’s mantle cools and hardens
metamorphic rock
“new rock that forms when exisiting rocks are changed by heat, pressure, or chemicals”
mineral
a solid material in Earth’s crust that has a definite chemical makeup
sediment
“sand particles of rock, bits of soil, and remains of once-living things”
sedimentary rock
rock that forms when sediment settles and is glued together by dissolved minerals
mantle
thick layer of rock between the crust and the core.
core
a dense ball with liquid outer part and a solid inner part.
crust
the outer layer of the earth.
lava
molten rock that flows onton Earth’s surface
magma
molten rock below the Earth’s surface
rock cycle
continious series of changes that rocks go through
erosion
movement of rock material from one place to another
weathering
wearing away of rock into smaller pieces

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