Lists 1 and 2 - UOI 4

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Across
  1. 4. to be without
  2. 7. replies or reactions to something
  3. 9. events that cause destruction or suffering
  4. 10. difficult situations
  5. 13. to tug or drag
  6. 14. a person's native country
  7. 15. to scout or investigate in order to discover
  8. 17. one who moves to a different country
  9. 18. to become or make better or enhance in value
  10. 19. a trip or voyage from one place to another
  11. 20. move something forward from behind
Down
  1. 1. potential hazards connected to something
  2. 2. entrance
  3. 3. preventing movement or progress
  4. 5. went out or away from
  5. 6. people born during the same time period
  6. 8. a change that occurs to fit certain conditions
  7. 11. to go away or depart
  8. 12. the movement from one place to another
  9. 16. chances or advantageous conditions