Rocks

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 5. Mountain that erupts with lava (7)
  2. 9. A rudaceous rock consisting of sharp fragments embedded in clay or sand (7)
  3. 12. Rock that in its molten form issues from volcanos (4)
  4. 13. Produced by the action of water (11)
  5. 15. A light glass formed on the surface of some lavas (6)
  6. 16. The commonest type of solidified lava (6)

Down

  1. 1. The process whereby a protein molecule assumes its intricate three-dimensional shape (7)
  2. 2. A fragment of incombustible matter left after a wood or coal or charcoal fire (plural) (7)
  3. 3. Molten rock in the earth's crust (5)
  4. 4. Substance used in or made by chemistry (8)
  5. 6. A sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals (9)
  6. 7. A fertilizer that is derived from animal or vegetable matter (7)
  7. 8. Force pushing on something (8)
  8. 10. A rock formed by the solidification of a substance (plural) (8)
  9. 11. Thin layers of rock used for roofing (5)
  10. 14. A hard glossy mineral consisting of silicon dioxide in crystal form (6)