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| a naturally occurring solid in Earth's crust with a definite structure and composition. |
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| a substance that cannot be broken down any further into anything simpler |
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| a chemical combination of two or more elements |
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| the smallest particle of an element that has the same chemical properties of the element. |
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| a property that can be observed without changing the identity of a substance. |
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| how a mineral resists scratching |
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| amount of light that a mineral reflects |
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| color of a mineral when it is ground into powder |
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| how the surface of a mineral feels to the touch |
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| when you scratch a mineral with certain objects to see how hard they are |
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| rocks are continually changing from one to another in a never-ending cycle |
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| formed from hot liquid rock material from volcanoes. It cools and hardens into solid. |
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| molten rock below Earth's surface |
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| molten rock that flows on Earth's surface from a volcano |
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| Bits and pieces of rock clumped together. |
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| a rock that forms from another kind of rock that is changed by heat, pressure, or a chemical reaction |
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| what a rock or mineral is made up as |
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