Fossilization crossword puzzle

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Across
  1. 3. What holds us together in our body
  2. 5. Layer in time
  3. 7. Physical force exerted
  4. 8. Widespread decrease of life
  5. 10. Process of eroding
  6. 12. Studies the form of life
  7. 15. Beautiful shine on a hot day
  8. 16. Remains of an organism
Down
  1. 1. Turning to stone
  2. 2. Last period of paleozoic era
  3. 4. Sudden eruption
  4. 5. Rock formed
  5. 6. Action of being adapted
  6. 9. Group of living organisms
  7. 11. Long period in history
  8. 13. Second period of paleozoic era
  9. 14. Earliest period of mesozoic era