Geological Time

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Across
  1. 4. Thicker bones
  2. 5. Upper forearm
  3. 8. A backbone
  4. 10. Lower forearm
  5. 12. Rock made of loose particles
  6. 13. Long phalanges
  7. 14. Upper fingers
Down
  1. 1. Opposable thumbs
  2. 2. Long phalanges and can swim
  3. 3. Shoulder to elbow
  4. 4. Predator like legs
  5. 6. Lower fingers
  6. 7. Opposite of palm
  7. 9. Layers of rock
  8. 11. Has wings and is aerodynamic