test – Flashcard

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radula
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rough, tongelike organ of a snail.
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minerals
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are inorganic solid material found in nature .
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rocks
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such as the atoms in the crystal is unique to each mineral.
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crystals
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solid material that have such a pattern of atoms.
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cleavage
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they split into pieces with smooth regular planes that reflect light.
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color
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is the color of the mineral
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fracture
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some break into pieces and have ruff edges .
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streak
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wiping a rock across a glass tile is cleavage it leaves a streak
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luster
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luster is how it shines.
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hardness
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hardness is how hard it is and what is can scratch.
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gems
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are minerals that are rare and can be polished and celled for jewelry.
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ore
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a mineral is called a ore
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