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Rock Vocab
Term | Definition |
---|---|
extrusive igneous rock | forms when lava cools on Earth’s surface, usually with smaller crystals because of quicker cooling |
the rock cycle | set of natural processes that form, change, break down, and re-form rocks |
metamorphic rock | forms when heat or pressure causes older rocks to change into new types of rocks |
igneous rock | forms when molten rock cools and becomes solid |
sedimentary rock | forms when pieces of older rocks, plants, and other loose material get pressed or cemented together |
metamorphism | process in which an existing rock is changed by heat or pressure - or both |
intrusive igneous rock | forms when magma cools within Earth, usually with larger crystals because of a longer cooling time |
recrystallization | process where heat and pressure break the bonds that join atoms in minerals, then the atoms join together to form new bonds |
sediment | materials that settle out of water or air |
foliation | an arrangement of minerals in flat or wavy parallel bands |
rock | a naturally formed solid that is usually made up of one or more types of minerals |