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To correctly classify a rock as igneous, sedimentary, or metamorphic, what would a geologist need to know?

A.
color of the rock

B.
the hardness of the rock

C.
how the rock formed

D.
how the rock breaks apart

User JayG
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2 Answers

3 votes
C - How the rock is formed.
User Andrea Richiardi
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2 votes
A geologist would have to know C. how the rock formed.
User Bbnn
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