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Name: ________________________________ Date:_________________ #: ___ Science: Chapter 7: The Rock Cycle Vocabulary Mineral- a naturally occurring, nonliving solid that has a specific chemical makeup and a repeating structure (p. 264). Streak- the color of the powder left behind when you rub a mineral against a rough white tile or a streak plate (p. 265). Luster- the way a mineral’s surface reflects light (p. 265). Hardness- a mineral’s ability to resist being scratched (p. 266). Rock- a natural substance made of one or more minerals (p. 274). Igneous rock- rocks that form when melted rock cools and hardens (p. 274). Deposition- the process in which sediment settles out of water or is dropped by wind (p. 276). Sedimentary rock- rocks formed when sediments are cemented together (p. 276). Metamorphic rock- rocks formed when high heat and great pressure change existing rocks into a new form (p. 278). Weathering – the process of wearing away rocks by natural processes (p. 286). Erosion- the process of moving sediment by wind, moving water, or ice (p. 287). Rock cycle- the continuous process in which one type of rock changes into another type (p. 288).