question number 13 of 20 - earth science extrusive rocks have small grains because they - f have a rough…

question number 13 of 20 - earth science extrusive rocks have small grains because they - f have a rough mixture g contain rare minerals h harden underground i cool quickly

question number 13 of 20 - earth science extrusive rocks have small grains because they - f have a rough mixture g contain rare minerals h harden underground i cool quickly

Answer

Brief Explanations:

Extrusive rocks form on the Earth's surface. When magma reaches the surface, it cools rapidly. Rapid cooling does not allow large crystals to form, resulting in small - grained rocks. Options F and G are not related to grain size. Option H is incorrect as extrusive rocks form above - ground.

Answer:

J. cool quickly