Comprise or Compose?

Comprise means "is made up of" or "consists of." The whole comprises the parts.

Compose means "make up" or "make." The parts compose the whole.

Incorrect: The rock is comprised of three minerals.

Correct: The rock is composed of three minerals.

Correct: The rock comprises three minerals.

Correct: Three minerals compose the rock.

If you are confused, just say, "The rock is made up of three minerals," or "Three minerals make up the rock."


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