Classifying Rocks and Igneous Rocks Vocabulary

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Across
  1. 5. rock formed from cooled magma
  2. 8. size of crystals that cooled slowly
  3. 11. gneiss has this pattern of particles
  4. 13. a coarse grained rock
  5. 14. size of crystals that cooled quickly
  6. 15. has rounded grains of several rocks
  7. 18. make up most of the rocks in the Earth's crust
Down
  1. 1. rock formed from cooled lava
  2. 2. dark colored rock with a lower silica content
  3. 3. used by Incas to build fortresses
  4. 4. has jagged grains of several rocks
  5. 6. rock of layers formed of small particles of rock or the remains of plants and animals
  6. 7. quickly cooled forms no crystals
  7. 9. has holes from gas bubbles are trapped in fast-cooling lava
  8. 10. rock formed from intense heat and pressure
  9. 12. the look and feel of a rock's surface
  10. 16. light colored rock high in silica content
  11. 17. particles of minerals that make up a rock
  12. 19. rock formed from the cooling of lava or magma