Relative and Absolute Dating

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Across
  1. 3. unstable atoms
  2. 5. oldest layer is on the bottom
  3. 6. gives years in order they happened
  4. 7. radioactive elements give actual age
  5. 11. scientist who studies fossils
  6. 13. the rock formed around these
  7. 14. the remains or traces of a dead plant or animal
Down
  1. 1. scientist who discovered the significance of tree rings.
  2. 2. vein of rock is younger than rock
  3. 4. the fossils tell the relative age
  4. 8. tree ring dating
  5. 9. has half-life of 4.5 billion yrs
  6. 10. study of rocks and rock formations
  7. 12. time for half unstable atoms to decay