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My Science Project

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Across
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Solid substances that occur naturally
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When sand, mud and pebbles get layed down over time layers are squashed turning into this
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Naturally occuring solid material
Down
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A transformation of a preexisting rock
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Force over a unitcaused by the weight of the atmosphere on earth
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Solidified from molten earth material
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The softest material in the world
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How light interacts with the surface of a crystal
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A measure of hard a material is
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Hardest material in the world