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Across 2. A process that recycles rock into new types of rock. 4. A natural, non-living, solid crystal that makes up rocks. 5. Used to identify a mineral and includes color, luster, hardness, streak, cleavage, and shape. 9. Type of rock that forms when layers of sediments settle on top of one another and harden. 12. Type of rock that forms from molten rock. 13. Hot, molten rock that reaches Earth's surface. 14. A rock rich in valuable minerals that can be removed from Earth's crust.

Down 1. Type of rock formed when heat and pressure change the properties of rock. 3. A three-dimensional shape with flat surfaces. 6. Rocks contain many valuable ___________________. 7. To use again. 8. The color of the powder that a mineral leaves when it is scratched across a special plate. 10. Hot, molten rock that forms deep underground. 11. Property of a mineral that describes how it reflects light.