Question

Where would you expect molten rock to cool slowly and large crystals form? Why?

Answer 1

Answer:

When magma cools underground, it cools very slowly and when lava cools above ground, it cools quickly. When magma and lava cool, mineral crystals start to form in the molten rock. Plutonic rocks, which cool slowly underground, have large crystals because the crystals had enough time to grow to a large size.

Explanation:

It basicly startes to molden the rock, and more.