Chapter 6 Intro Crossword

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Across
  1. 2. The idea that geologic processes occurring now are the same as those in the past.
  2. 4. Determining whether an object or event is older or younger than other objects or events.
  3. 5. Remains or physical evidence of an organism preserved by geologic process.
  4. 8. Process of establishing the age of an object by determining the number of years it has existed.
  5. 9. Fossils of organisms that lived during a relatively – short, well defined geologic time span
  6. 11. The idea that geologic change happens suddenly.
  7. 12. a science that combines uniformitarianism and catastrophism.
  8. 13. The principle that states that younger rocks lie above older rocks in undisturbed sequences. *younger over older*
Down
  1. 1. Missing rock layers create breaks in rock layer sequences
  2. 3. Any naturally preserved evidence of animal activity
  3. 6. the death of every member of a species
  4. 7. The study of past life
  5. 10. An ideal sequence of rock layers that contain all the known fossils and rock formations on Earth arranged from oldest to youngest.