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Ch.3 Earth Science
Rocks and Their Origins
| Term | Definition |
|---|---|
| rock | mixture of minerals, generally cemented together. |
| igneous rock | rock formed by the crystallization of hot melted rocks or minerals. |
| sedimentary rock | rock formed from pieces of other rocks that are cemented together. |
| metamorphic rock | rock formed when existing rocks are changed by heat and pressure. |
| molten rock | melted minerals. |
| magma | molten rock inside Earth. |
| pluton | large body of igneous rock that can form into different shapes when magma cools inside Earth's crust. |
| lava | magma that reaches Earth's surface. |
| texture | size of the crystals in an igneous rock. |
| sediment | rock particles carried and deposited by water, wind, or ice. |
| clastic rock | sedimentary rock made up of fragments of rock. |
| nonclastic rock | sedimentary rock made up of dissolved minerals or the remains of living things. |
| foliated | texture of a metamorphic rock that has mineral crystals arranged in bands. |
| nonfoliated | texture of a metamorphic rock that does not have mineral crystals arranged in bands. |
| cycle | series of events that happen over and over again. |
| Rock cycle | series of natural processes by which rocks are slowly changed from one kind of rock to another kind of rock. |