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Rocks and Minerals
Question | Answer |
---|---|
Mineralogy | the study of crystal structure, chemistry, and properties of minerals |
minerals | natural, inorganic substances with a chemical make-up that are formed by a geological process |
cleavage | a sharp division or split found in minerals |
density | how compact a substance is calculated by dividing the mass by the volume |
Mohs scale | a scale used to measure the hardness of minerals |
luster | the way light interacts with the surface of a mineral, crystal, or rock |
streak | the color of a mineral's powder |
sediments | matter deposited as a layer on the bottom of a body of water |
sedimentary rocks | made from random materials in layers that turn into rock over time |
metamorphic rocks | made by heat or pressure over time and used to be sedimentary or igneous rocks |
igneous rocks | made from molten lava or magma that cools quickly and can be either extrusive or intrusive |