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How is the composition of a meteorite relevant to finding out the composition of earth's core?
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This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.
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Can copper be scratched by a fingernail or blade knife. why?...
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