| A | B |
|---|
| Igneous Rock | rocks formed by the cooling of molten rock |
| Metamorphic Rock | rocks formed from previous forms of rock by great heat, great pressure or chemical action |
| Sedimentary Rock | rocks formed when sediments are compacted and/or cemented together |
| Rock | a naturally formed, nonliving, solid, mass of minerals and other stuff |
| felsic | silicate minerals that are light colored and low density like quartz and potassium feldspar |
| mafic | silicate minerals that are dark colored due to iron and magensium, such as olivine and pyroxene |
| texture | the size, shape, and arrangement of mineral crystals or grains in rocks |
| grain size | the size of a mineral crystal across its diameter |
| porphyritic texture | An unusual texture where large and small grain size are mixed together in one rock |
| intrusive rock | rock that forms from magma that cools slowly within the earth |
| extrusive rock | rock that forms from lava that cools swiftly outside of the earth |
| plutonic rock | same as intrusive(Pluto ruled the underworld) |
| volcanic rock | same as extrusive |
| magma | molten rock found underground |
| lava | molten rock found above ground |
| crystallization | the process of molten rock forming into mineral crystals |
| mineral composition | the minerals that make up a rock |
