Fossils Vocab

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Across
  1. 8. Fossilized dung
  2. 9. Holes made by animals in sediment
  3. 10. Preserved remains or traces of ancient life
  4. 11. Hollow imprint of an organism
  5. 13. Age compared to other rocks or fossils
  6. 14. Organism turns to stone
  7. 19. Layered structures made by cyanobacteria
  8. 20. Evidence of an organism’s activity (like footprints)
  9. 21. Older rocks lie beneath younger rocks
Down
  1. 1. Fossil formed when minerals fill tissues
  2. 2. Timeline of Earth’s history
  3. 3. Exact age in years
  4. 4. Original material of an organism is replaced by minerals
  5. 5. Fossil retains only carbon residue
  6. 6. History of life preserved in fossils
  7. 7. Hardened tree sap that can trap organisms
  8. 12. Rocks formed from compacted sediments
  9. 15. Extinct marine mollusks with coiled shells
  10. 16. Fossil used to date rock layers
  11. 17. Scientist who studies fossils
  12. 18. 3D copy of an organism formed in sediment