Rocks

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 3. One of a family of granular intrusive rocks (6)
  2. 5. A green or blue mineral used as an ore of copper and for making ornamental objects (9)
  3. 8. Thin layers of rock used for roofing (5)
  4. 9. A sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals (9)
  5. 10. A common white or colorless mineral used to make cements and plasters (6)
  6. 11. A hard glossy mineral consisting of silicon dioxide in crystal form (6)
  7. 12. Any of a group of hard crystalline minerals that consist of aluminum silicates of potassium (8)
  8. 13. A hard crystalline metamorphic rock that takes a high polish (6)

Down

  1. 1. Produced by the action of fire or intense heat (7)
  2. 2. Plutonic igneous rock having visibly crystalline texture (7)
  3. 4. A sedimentary rock consisting of sand consolidated with some cement (9)
  4. 6. Rock that in its molten form issues from volcanos (4)
  5. 7. Any metamorphic rock that can be split into thin layers (6)
  6. 10. Any of a group of hard glassy minerals used as gemstones and as an abrasive (6)