Question

If igneous rock forms above ground after a volcanic eruption, it ______________, forming ____________ igneous rock, such as obsidian which is a naturally occurring volcanic rock.

Question 13 options:

Cools quickly, extrusive


Cools quickly, intrusive


Cools slowly, extrusive


Cools slowly, intrusive

Answer 1

A-Cools quickly, extrusive

Step-by-step explanation:

C and D are wrong because the rocks cool quickly, not slowly, and B is wrong because it forms an extrustive igneous rock, not an intrusive igneous rock.