| A | B |
|---|
| mineral | a solid material with particles arranged in a repeated pattern |
| streak | the color of the powder left behind when you rub a mineral against a streak plate |
| luster | describes the way a mineral reflects light |
| hardness | a minerals ability to resist being scratched |
| rock | a material made up of one or more minerals |
| igneous rock | rocks that form when melted rock hardens |
| sedimentary rock | formed after layers of sediment are squeezed and stuck together |
| metamorphic rock | a rock changed by high heat and pressure |
| rock cycle | the process that changes and forms rocks over time |
