1. An igneous rock that forms from long, slow cooling is characterized by
A: no crystallization
B: microscopic crystals
C: large, well-defined crystals
2. Igneous rocks form when
A: collected sediments accumulate over time
B: extreme heat and pressure change a pre-existing rock
C: magma cools and solidifies
3. An igneous rock displays coarse-sized grains that can easily be seen with the naked eyes. The rock is most likely
A: extrusive
B: intrusive
C: volcanic