CHAPTER 1

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Across
  1. 2. rock formed by heat and pressure below Earth's crust
  2. 5. beautiful, rare precious stones
  3. 7. rock that forms when layers of sediment and organic material harden
  4. 11. scale used to determine hardness
  5. 12. rock like substance formed from decayed plant matter
  6. 15. rock formed from magma or volcanic lava
  7. 17. the way a mineral reflects light
  8. 18. a type of igneous rock
  9. 20. layer containing most of the Earth's mass
  10. 21. thin outer layer of the Earth
Down
  1. 1. type of sedimentary rock
  2. 3. hard natural substance made of one or more minerals that contain organic materials
  3. 4. the ability of a mineral to resist scratching
  4. 5. studies structure, rocks and minerals of the Earth
  5. 6. movement of sediment from one place to another
  6. 7. type of metamorphic rock
  7. 8. substance made of things that were never alive
  8. 9. where minerals are usually found
  9. 10. small bits of weathered rocks
  10. 11. inorganic substance found naturally in the Earth
  11. 13. how most sedimentary rocks were formed
  12. 14. center of the Earth
  13. 16. loose material on the surface of the Earth where plants grow
  14. 19. color of the mark when a mineral is rubbed on a harder surface