Question

O 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

Answer 1

A. compaction and cementation because B. creates a metamorphic rock, C. creates sediments, and D. creates magma.
Again, I hope this helps.=^1

Answer 2

C.
how the rock formed