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CM3 FK2
Rocks and Minerals
Term | Definition |
---|---|
mineral | a natural, solid material with particles arranged in a repeating pattern |
streak | the color of a powder left behind when you rub a mineral against a white tile called a streak plate |
luster | the way that the surface of a mineral reflects light |
hardness | a mineral's ability to resist being scratched |
rock | a material made up of one or more minerals |
igneous rock | a rock that forms when completely melted rock hardens |
sedimentary rock | a rock formed by layers of sediments squeezed and stuck together over a long time |
metamorphic rock | a rock changed by heat and pressure, but not completely melted |
weathering | the process by which rocks are broken down into smaller pieces |
erosion | the process by which wind and moving water carry away bits of rock |
rock cycle | the slow never-ending process of rock changes |