English 3D Issue 1 (Teen Sleep) #4

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Across
  1. 3. series of events
  2. 5. to control
  3. 7. dangerous chance
  4. 10. lack of sleep
  5. 14. youth
  6. 15. adequate
  7. 17. ideal
  8. 18. tendency
  9. 19. necessary
Down
  1. 1. piece of advice
  2. 2. to react
  3. 4. evident
  4. 5. to conduct a study
  5. 6. emotional state
  6. 8. opinion
  7. 9. step in a process
  8. 11. investigation
  9. 12. indication
  10. 13. scientific application
  11. 16. amount of loss