Question

multiple select question
select all that apply
which terms are used to describe the texture of extrusive and intrusive rocks?

□ extrusive = coarse - grained

□ intrusive = fine - grained

□ intrusive = coarse - grained

□ extrusive = fine - grained

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Explanation:

Extrusive rocks form quickly at the surface, so they have fine - grained texture. Intrusive rocks form slowly underground, so they have coarse - grained texture. So "intrusive = coarse - grained" and "extrusive = fine - grained" are correct.

Answer:

C. intrusive = coarse - grained, D. extrusive = fine - grained