Jessica * Geology

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Across
  1. 6. - gray-black magnetic mineral which consists of an oxide of iron and is an important form of iron ore
  2. 8. - a natural substance with distinctive chemical and physical properties, composition, and atomic structure
  3. 9. - the plate boundary moving towards another plate meaning its a ————— plate boundary
  4. 10. - a piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces.
  5. 11. - a hard sedimentary rock, composed mainly of calcium carbonate or dolomite, used as building material and in the making of cement.
  6. 13. - the plate boundary moving away from another plate meaning it is a ————— plate boundary
  7. 14. -formed from pre-existing rocks or pieces of once-living organisms
  8. 17. - denoting or relating to rock that has undergone transformation by heat, pressure, or other natural agencies, e.g. in the folding of strata or the nearby intrusion of igneous rocks.
  9. 18. - sedimentary rock consisting of sand or quartz grains cemented together, typically red, yellow, or brown in color
  10. 19. - stiffness
Down
  1. 1. - a hard, dark, glasslike volcanic rock formed by the rapid solidification of lava without crystallization.
  2. 2. - a very hard, granular, crystalline, igneous rock consisting mainly of quartz, mica, and feldspar and often used as a building stone.
  3. 3. - a gray crystalline allotropic form of carbon which occurs as a mineral in some rocks and can be made from coke. It is used as a solid lubricant, in pencils, and as a moderator in nuclear reactors.
  4. 4. - relating to or involving volcanic processes to make this rock
  5. 5. - yellow precious metal, the chemical element of atomic number 79, used especially in jewelry and decoration and to guarantee the value of currencies.
  6. 7. - the process of wearing or being worn by long exposure to the atmosphere.
  7. 12. - a layer inside a planetary body bounded below by a core and above by a crust.
  8. 15. - any solid material in which the component atoms are arranged in a definite pattern and whose surface regularity reflects its internal symmetry
  9. 16. - the chemical element of atomic number 19, a soft silvery-white reactive metal of the alkali metal group.
  10. 17. - the process or industry of obtaining coal or other minerals from a mine.