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6th grade Rocks
Term | Definition |
---|---|
basaltic rocks | dense dark colored igneous rock that form from magma that is rich in magnesium and iron, and low in silica |
chemical sedimentary rocks | sedimentary rock that is formed when dissolved minerals come out of a solution |
clastic sedimentary rocks | formed from weathered sediments that have been cemented together. |
extrusive rocks | igneous rocks that are formed from cooling lava |
intrusive rocks | igneous rocks that are formed from cooling magma |
foliated rocks | metamorphic rocks that have mineral grains that line up in parallel layers |
granitic rocks | light colored igneous rock that have a low density and high silica |
igneous rock | forms when molten rock cools and hardens |
metamorphic rocks | rocks that have changed due to intense heat and pressure |
organic sedimentary rocks | rocks that are made up of once- living things |
rock | made up of two or more minerals |
rock cycle | used to explain the endless cycle of change that rock undergoes as they change from one type to another |
sedimentary rock | forms when sediments are compressed compacted and cemented together, or when minerals form in a solution |