| A | B |
|---|
| foliation | Metamorphic rock sometimes has this layered appearance. |
| grains | the individual particles in rocks |
| igneous rock | type of rock that forms when magma or lava cools and hardens |
| lava | molten rock that erupts onto Earth's surface |
| lithification | process through which sediment turns into rock |
| magma | molten rock found inside Earth |
| metamorphic | type of rock that results from changes that occur in existing rocks |
| parent rock | name for the original rocks that are changed into metamorphic rocks |
| rock | a naturally occurring solid mixture made of minerals, rock fragments, organic matter, or glass |
| sedimentary | type of rock made of layers that are pressed or cemented together |
