Question

understand main ideas 1. mainidea predict the appearance of an igneous rock that formed as magma cooled quickly and then more slowly.

Explanation:

When magma cools quickly, it forms small - sized crystals as there is less time for crystal growth. When it then cools slowly, larger crystals can form within the matrix of the smaller ones. So the rock will have a porphyritic texture, with large crystals (phenocrysts) embedded in a fine - grained matrix (groundmass).

Answer:

The igneous rock will have a porphyritic texture, with large crystals (phenocrysts) embedded in a fine - grained matrix (groundmass).