Geologic Time Scale

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Across
  1. 2. the predictable time an element takes to decay
  2. 4. The study of how sedimentary rock layers form and their relationships to one another is a branch of geology known as stratigraphy.
  3. 5. a scientist who studies Earth’s crust as well as the processes and history that shaped it
  4. 6. To determine age by using exact ages (Ex. He 15 and She is 36)
  5. 7. To determine age using words like Younger or Older
  6. 8. a scientist that studies fossil remains found on Earth’s surface in order to study primitive life forms such as: plants, animals, fungi, and bacteria
Down
  1. 1. the process of determining if one rock or geologic event is older or younger than another, without knowing their specific ages
  2. 3. The remains of ancient organisms