| A | B |
|---|
| Crystal size in igneous rocks depend on | the rate of cooling |
| Intrusive igneous rocks form | slowly beneath the earths surface |
| Extrusive igneous rocks form | quickly on the earths surface |
| Continents are | granite and thick |
| Oceans are | basalt and thin |
| Sedimentary rocks form from | sediments,evaporation of water and organic remains |
| rocks are identified by their | texture |
| Igneous | course,fine,glassy,vesicular |
| Sedimentary | clastic |
| Metamorphic | foliated |
| Fossils are found almost excusively in | sedimentary rocks |
| Metamorphic rocks form from | other rocks by the action of heat/pressure |
| Contact metamorphism occurs when | molten rock comes in contact with other rocks |
| Regional metamorphism occurs | over large areas and is associated with mountain building |
