When lave cools fairly quickly, but not instantaneously, the rock that is producing will have small or nearly invisible crystalsform.
it explodes
it getys harder
A fan.
Lava will cool quickly compared to underground magma.
It cools quickly.
guess
"Larger than if it cools quickly" is about all that's definitively possible to say.
Small
It expands and cools
No. Granite cools from magma deep underground. Volcanic glass cools quickly at or near the surface.
Lava cools quickly and forms rocks with small crystals. They are called extrusive igneous rocks.
It is true that lava cools quickly and forms minerals with small crystals.