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generally light- colored rock that has high silica content

rock-forming mineral

one of the common minerals that make up most of the rocks of Earth's crust


dark colored-rock, low silica content


particles of minerals or other rocks


look and feel of rock's surface

igneous rock

forms from cooling of magma or lava

sedimentary rock

forms when particles of other rocks or the remains of plants and animals are pressed and cemented together

metamorphic rock

forms when existing rock is changed by heat, pressure, or chemical reactions

extrusive rock

igneous rock formed from lava that erupted into earth's surface

intrusive rock

igneous rock that formed when magma hardened beneath earth's surface


small, solid pieces of material that come from rocks or living things


running water, wind, or ice loosen and carry away fragments of rock


process by which sediment settles out of the water or wind carrying it


process that presses sediments together


process in which dissolved minerals crystallize and glue particles of sediments together

clastic rock

sedimentary rock that forms when rock fragments are squeezed together

organic rock

forms where the remains of plants and animals are deposited in thick layers

chemical rock

forms when minerals that are dissolved in a solution crystallize

coral reef

structure formed from skeletons


mettamorphic rocks that have their grains arranged in parallel layers of bands


mineral grains in rocks arranged randomly

rock cycle

series of proccesses on earth's surface and in the crust and mantle that slowly change rocks from one another

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