Geological Time Scale

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Across
  1. 3. long period of time
  2. 5. seperating something
  3. 7. period of time
  4. 9. going back in time
  5. 10. high melting points
Down
  1. 1. used in measurements
  2. 2. piece of time
  3. 4. living organisms are thought to have developed
  4. 6. where we live
  5. 8. set of connected things