Unit 3 Final Project

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Across
  1. 4. Guestimate of how old a rock is.
  2. 6. A widely distributed fossil, of narrow range in time, regarded as characteristic of a given geological formation, used especially in determining the age of related formations.
  3. 7. A fossilized track, trail, burrow, boring, or other structure in sedimentary rock that records the presence or behavior of the organism that made it.
  4. 10. Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water and wind.
  5. 11. The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
  6. 12. A term used by paleontologists to refer to the total number of fossils that have been discovered, as well as to the information derived from them.
Down
  1. 1. A timeline of geology.
  2. 2. How old a rock actually is.
  3. 3. When a plant or animal gradually turns into stone.
  4. 5. to receive form in a mold.
  5. 8. The formation of a fossil from the remains of an organism by the replacement of its tissues by minerals.
  6. 9. a hollow form or matrix for giving a particular shape to something in a molten or plastic state.