| A | B |
|---|
| Rock Cycle | Continuous changing of rocks from one kind to another over long periods of time |
| Extrusive Rocks | Rocks formed from lava |
| Intrusive Rocks | Igneous rocks formed deep within the Earth |
| Metamorphism | Changing of one type of rock into another as a result of heat, pressure and chemical reactions |
| Rocks | A hard substance composed of one or more minerals or minerallike substances |
| Igneous | Formed from molten rock |
| Sedimentary | Formed by the compacting of sediments cementing of sediments or by other non-igneous processes at the Earth's surface |
| Metamorphic | Changed in from as a result of chemical reactions, heat and pressure |
| Sediments | particles of rock or organic materials that have been carried along and deposited by water and wind |
| Clastic rock | A sedimentary rock formed from fragments of previously existing rocks |
| Organic rock | A sedimentary rock that is formed either directly or indirectly from material that was once alive |
| Chemical rock | A non-clastic sedimentary rock formed by inorganic processes such as evaporation |
