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Across 2. the mineral's resistance to being scratched. 6. a substance that only contains one type of atom 9. the tendency of a mineral to break along flat surfaces 10. molten rock that has reached earth's surface 11. a solid in which the atoms are arranged in an orderly, repeating, three dimensional pattern 12. the color of a mineral's powder 14. forms when pieces of older rocks, plants, shells or other loose material gets pressed and cemented together 16. the amount of mass in a given volume of the substance 19. forms when magma cools within earth 20. the hardest mineral on Moh's scale 21. naturally formed solid that is usually made up of one or more type of minerals 22. the building blocks of rocks

Down 1. melted or molten rock inside of earth 3. forms whenlava cool's on earth's surface 4. the softest mineral on Moh's hardness scale 5. the tendency of a mineral to break into irregular pieces 7. forms when heat and pressure causes older rocks to change into a new type of rock 8. forms when molten rock cools and becomes solid. 10. the way that light reflects against a mineral's surface 13. loose pieces of of rock and minerals 15. a set of natual processes that form, changebreak down, and re-form rocks. 17. rocks that contain enough minerals to be mined for profit 18. the force that opposes motion