Science

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Across
  1. 2. the process of returning land to its original condition after mining is completed
  2. 4. A measure of the ability of a mineral to resist scratching
  3. 8. a manner in which a mineral breaks along either curved or irregular surfaces
  4. 12. A mineral that contains a combination of silicon oxygen, and one or more metals
  5. 13. the color of the powder of a mineral
  6. 14. A substance that cannot be separated or broken down into simpler substances by chemical means
Down
  1. 1. a mineral that does not contain compounds of silicon and oxygen
  2. 3. A naturally formed, inorganic solid that has a definite crystalline structure
  3. 5. The way in which a mineral reflects light
  4. 6. The radio of the mass of a substance to the volume of the substance
  5. 7. The splitting of a mineral along smooth, flat surfaces
  6. 9. A solid whose atoms, ions, or molecules are arranged in a definite pattern
  7. 10. A substance made up of atoms of two or more different elements joined by chemical bonds
  8. 11. a natural material whose concentration of economically valuable minerals is high enough for the material to be mined profitably