Geologic Time Scale

12345678910
Across
  1. 2. Newer fossils on top, older on bottom
  2. 5. fossil that is useful for dating
  3. 7. events that happened with fossils and rocks
  4. 9. Exact age of rock or fossil
  5. 10. Rate of decay
Down
  1. 1. Time where dinosaurs were around
  2. 3. Rock fragemnts in other rocks
  3. 4. Radioactive decay of isotopes
  4. 6. rock is relative to another layer
  5. 8. Cutting a fossil to see what it is