Module 2

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Across
  1. 3. Framework for Earth's history divisions
  2. 5. Explanation based on observations
  3. 9. Noticing and recording details
  4. 10. Shortest chapter of Earth history
Down
  1. 1. Measure of change over time
  2. 2. Longest chapter of Earth history
  3. 4. Determine a value through math
  4. 6. Dating based on decay of elements
  5. 7. Third chapter of Earth history
  6. 8. Second chapter of Earth history