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quiz_2_5 - Lab 2 Quiz 1 An inorganic naturally occurring...

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Lab 2 Quiz 1) An inorganic, naturally occurring substance, with a characteristic chemical composition, distinctive physical properties, and a crystalline structure is known as a __________________. mineral 2) A description of how light reflects from the surface of an object is known as __________________. luster 3) The tendency for some minerals to break along surfaces of weak chemical bonding between repeating, parallel layers of atoms in a crystal is known as __________________. cleavage 4) The color of a substance after it has been ground or scratched to make a fine powder is known as __________________. streak 5) challenge ( choose one ) a) What is the difference between a cleavage plane and a fracture surface? A cleavge plane is a break along a plane of chemical weakness in the mineral structure. A fracture surface is a random break through the mineral structure. b) Define specific gravity. Density of material divided by density of water = S. G. (no units)
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Lab 3 Quiz 1) What are the three types of rocks? igneous sedimentary and metamorphic 2) Quartz, Na-Plagioclase, K-feldspar, and muscovite are _______________ minerals.
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