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Grade 5 C-2 Sci. Def
Chapter 2 Rocks and Minerals
Term | Definition |
---|---|
mineral | A natural, solid material with particles arranged in a repeating pattern |
streak | The color of the powder left behind when you rub a mineral against a white tile called a streak plate |
hardness | A mineral's ability to resist being scratched |
luster | The way the surface of a mineral reflects light |
igneous rock | A type of rock that forms when melted rock hardens |
sedimentary rock | A type of rock formed by layers of sediments that were squeezed and stuck together over a long time |
metamorphic rock | A type of rock changed by heat or pressure but not completely melted |
rock cycle | The slow, never-ending process of rock changes |