Science Vocabulary

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Across
  1. 3. and their decay products
  2. 5. Dating any method of measuring the age of an object or event in
  3. 7. and pressure
  4. 8. a type of rock that forms from the cooling of molten rock
  5. 11. fossils a fossil known to have lived in a particular geologic age
  6. 12. dating the process of measuring the absolute age of geologic
  7. 13. or younger than other events or objects
  8. 14. a crack in the Earth's crust
  9. 15. by measuring the concentrations of radioactive
  10. 17. by geologists and paleontologists
Down
  1. 1. or ice sheets
  2. 2. Rocks that undergo a physical change due to extreme
  3. 4. can be used to date the rock layer in which it is found
  4. 6. Time Scale the categories of time into which Earth's history is usually
  5. 9. study of earth history
  6. 10. or below the surface
  7. 12. dating any method of determining whether an event or object is
  8. 16. core A long cylinder of ice obtained from drilling through ice