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"Rocks" Vocabulary
6th Grade Earth Science, Ch 4-1
Term | Definition |
---|---|
rock | a naturally occurring solid mixture of one or more minerals or organic matter |
rock cycle | the series of processes in which a rock forms, changes from one type to another, is destroyed, and forms again by geological processes |
weathering | the process by which rock materials are broken down by the action of physical or chemical processes |
erosion | the process by which wind, water, ice or gravity transports soil and sediment from one location to another |
deposition | the process in which material is laid down |
magma | the hot liquid that forms when rock partially or completely melts |
sediment | mineral or organic matter deposited by water, ice or wind |
igneous rock | rock formed when magma (hot, liquid rock) cools and solidifies |
sedimentary rock | rock formed when grains of sediment are compacted and cemented together |
metamorphic rock | rock formed from intense heat and pressure squeezing sedimentary rock |
composition | the chemical makeup of a rock (what minerals it contains) |
texture | quality of a rock based on size, shape, & positions of the rock's grains |