Question

fill in the blank question when \boxed{} flows on earth’s surface, it cools quickly and there is not enough time for large \boxed{} to form. in contrast, when \boxed{} cools slowly beneath earth’s surface, there is sufficient time for large crystals to form.

Explanation:

The problem is about igneous rock formation. Magma (molten rock) that erupts onto the surface is called lava. Lava cools quickly on the surface, so large crystals don't form. Magma cooling slowly underground (intrusive) forms large crystals. So the first blank is "lava", the second is "crystals", the third is "Magma".

Answer:

First blank: lava
Second blank: crystals
Third blank: Magma