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Rocks and Minerals

4th Grade

TermDefinition
Rock Earth material made of multiple minerals.
Minerals Earth material that cannot be broken down into different components
Hardness Resistance of being scratched. Tested with a scratch test
Color Mineral property. Least useful when identifying.
Streak Color left behind when mineral is scratched against a streak plate
Luster Shininess of a mineral. How light reflects off of the mineral
Cleavage How a mineral breaks. If smooth it is cleavage. If jagged it is fracture.
Metamorphic rock Formed when a rock is transformed due to heat and pressure.
Igneous Rock Formed from cooling magma. Often has holes or vesicles in the rock.
Sedimentary rock Formed from particles such as pebbles, sand, silt, or clay. May contain fossils
Vinegar test Tests to see if calcite is present in a rock.
Created by: lbomar
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