Rocks

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Across
  1. 2. magma on the surface of the Earth
  2. 3. outermost layer of the earth
  3. 4. used for removing dead skin
  4. 7. used for industrial extraction of metals
  5. 10. studies rocks
  6. 12. type of igneous rock with large crystals
  7. 13. made of SOLID iron and nickel
  8. 16. colour of the powdered or crushed mineral
  9. 17. a basalt with holes
Down
  1. 1. earth's solid layer which FLOWS
  2. 5. contains metals
  3. 6. made from cooling of lava
  4. 8. glass like rock, used to make surgical blades
  5. 9. Mohs scale is a measure of this property of rocks
  6. 11. made of LIQUID iron and nickel
  7. 14. small pieces that reflect light in rocks
  8. 15. hot molten rock inside the Earth