| A | B |
|---|
 | Aphanitic texture |
 | Phaneritic texture |
| A phaneritic texture often means | an intrusive origin. |
| An aphanitic texture often means | an extrusive origin. |
| Intrusive rocks form | under the ground. |
| Extrusive rocks form | at or near the surface. |
| Quick cooling is indicated by | small crystal sizes (aphanitic). |
| Slow cooling is indicated by | large crystal sizes (phaneritic). |
| Igneous rocks form from | the cooling of lava or magma. |
| Metamorphic rocks form from | exposure to extreme pressure and/or temperature. |
| Foliation is a sign of | metamorphism. |
| The two types of metamorphism are | regional and contact. |
| The marble you often see in a restroom is | a metamorphic rock. |
| The granite that makes up many tombstones is | an igneous rock. |
 | Foliated metamorphic rock |
 | Nonfoliated metamorphic rock |
