Geological Time Scale

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Across
  1. 3. rate of decay
  2. 6. younger than what was cut
  3. 8. rock layers
  4. 9. the exact age
  5. 10. remains of plants and animals
Down
  1. 1. helps find the age of strata
  2. 2. age of the dinosaurs
  3. 4. radioactive
  4. 5. top is younger than bottom
  5. 7. comparing ages