chron, arium, ment

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Across
  1. 1. events in order
  2. 3. room with images of stars and planets
  3. 6. agree in time
  4. 7. giant store
  5. 9. judgment
Down
  1. 1. arranged in the order they happened
  2. 2. change
  3. 4. glass container
  4. 5. a watch or clock
  5. 8. occurring over and over again