Question

What is the difference between intrusive igneous rocks and extrusive igneous rocks? We just learned this and I still don’t know the difference.

Answer 1

The major visible difference between the two are crystal size, intrusive rocks have a larger crystal/grain texture due to the slow cooling of magma below the earth surface which encourages the growth of larger crystals, while extrusive rocks, because of the rapid cooling at/above the earth's surface does the opposite. Hope I helped

Answer 2

The intrusive rock cools slowly and the extrusive cools quickly