Rocks and Minerals

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Across
  1. 3. rock that forms when melted, or molten, rock from deep below Earth's surface cools and hardens
  2. 7. a measure of how easily a mineral can be scratched
  3. 8. rock that forms when existing rocks are changed by extreme heat and pressure
  4. 11. the color of a mineral when it is ground to a powder
  5. 12. a mineral that is dull or glassy
Down
  1. 1. a mineral that is shiny like a metal
  2. 2. a solid material made up of one or more minerals
  3. 4. rock that forms when sand, particles or rock, bits of soil, and remains of living things are pressed together and harden
  4. 5. sand, particles or rock, bits of soil, and remains of once-living things
  5. 6. a nonliving solid material that has a definite chemical makeup and is found in Earth's outermost layer
  6. 9. the continuous series of changes that rocks undergo
  7. 10. the tendency of a mineral to split easily along flat surfaces
  8. 13. the way a mineral shines, or reflects light