Question

Ayy I have a question

How would a geologist identify an igneous rock as extrusive?

A.
An extrusive rock is coarse-grained because it cooled slowly beneath the earth’s surface.

B.
An extrusive rock is coarse-grained because it cooled slowly on the earth’s surface.

C.
An extrusive rock is fine-grained because it cooled quickly on the earth’s surface.

D.
An extrusive rock is fine-grained because it cooled quickly beneath the earth’s surface.

Answer 1

A. because intrusive means slow cooling beneath the earth while extrusive is on the Earth's surface cools quite fast. Extrusive is fine grained and intrusive is coarse grained.

Answer 2

Thank you!!! c:

Answer 3

A.
And for future reference I have to ask you to please close the question after you have gotten a answer. Thanks in advance-Warriorz13