Chemical analysis of a rock can tell us what the rock is made of.

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Multiple Choice

Chemical analysis of a rock can tell us what the rock is made of.

Explanation:
Chemical analysis tells you what a rock is made of—the elements and minerals that compose it. By measuring the chemical makeup, you learn its material content, which is what “made of” refers to in the rock. Age, on the other hand, is determined by dating methods that look at isotopic ratios, not just composition; orbital origin isn’t something you infer from chemical makeup alone. So the analysis directly reveals the rock’s composition, i.e., what it is made of.

Chemical analysis tells you what a rock is made of—the elements and minerals that compose it. By measuring the chemical makeup, you learn its material content, which is what “made of” refers to in the rock. Age, on the other hand, is determined by dating methods that look at isotopic ratios, not just composition; orbital origin isn’t something you infer from chemical makeup alone. So the analysis directly reveals the rock’s composition, i.e., what it is made of.

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