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6th gr Geology

Rocks & Minerals

TermDefinition
Minerals A hard substance that is made naturally in Earth.
Hardness A measure of how easily a mineral can be scratched.
Mohs Scale of Hardness A harder material (which has a higher number) can scratch a softer material (which has a lower number).
color The appearance of the mineral in reflected light or transmitted light for translucent minerals (i.e. what it looks like to the naked eye).
Luster Shiny
Streak A way to determine the type of mineral by looking at the color it makes.
Rock Cycle The way rocks change and become different rocks.
Igneous Rock A type of rock that forms when magma cools.
Metamorphic Rock A type of rock that has been changed by heat and pressure.
Sedimentary Rock A type of rock that is formed when small pieces of rock are squeezed together.
Weathering Being broken down apart by wind, water, or ice.
Erosion The movement of small pieces of rock by wind, water, ice, or gravity.
Sediments Small pieces of rocks, shells, and bones.
Deposition Small pieces of rocks and bones have been placed in a different location by wind, water, or gravity.
Cementation Small pieces of rocks and bones being glued together to form a rock.
Compaction Using pressure to make rocks and bones smaller.
Lava Melted rock on the Earth’s surface.
Magma Melted rock that is found inside the Earth.
Created by: NEISDSci
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