| A | B |
|---|
| rock | a mixture of one or more minerals, mineraloids, glass, or organic matter |
| rock cycle | processes that form and change rocks |
| igneous rock | molten material at Earth's surface |
| lava | magma that flows from volcanoes |
| intrusive | rocks that form below earth's surface, have large mineral grains |
| extrusive | are formed when lava cools on or near Earth's surface |
| basaltic | dense, heavy, dark-colored rocks that form |
| granitic | light colored rocks of a lower density |
| metamorphic rock | a rock formed from heat and pressure |
| foliated | when mineral grains flatten and line up in parallel bands, slate and gneiss |
| nonfoliated | these mineral grains change, grow and rearrange but they don't form bands, quartzite |
| sedimentary rock | formed when sediments become pressed or cemented |
| sediment | loose materials such as rock fragments, mineral grains and bits of plant and animal remains |
| compaction | where small sediments stick together and form a solid rock |
| cementation | when large sediments are stuck together after water soaks through the soil and rock |
| waste coal | by product of coal mining, poor quality coal |
| cogeneration | both electrical and thermal energy are used by the plant |
