Crossword puzzle

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Across
  1. 5. A lifeless thing that can feel hungry
  2. 6. Noisy without sound
  3. 9. Can be empty, yet heavy
  4. 10. Comes without form, leaves without a trace
  5. 11. The more you store it, the less you have
  6. 15. Has boundaries, but they cannot be seen
  7. 16. Does not move, yet always shifts
  8. 17. Always correct until erased
  9. 19. Stepped on every day without complaining
  10. 20. The more it is opened, the more it is closed
Down
  1. 1. Has content, but is not container
  2. 2. Cnnotlie yet is ofte blamed
  3. 3. Always needed, but often forgotten during exams
  4. 4. Always follows, but never leads
  5. 7. Has direction, but never walks
  6. 8. Always in front of you, but never can be touched
  7. 12. Comes late, yet always gets blamed
  8. 13. Can break without cracking
  9. 14. Not alive yet can grow
  10. 18. Does not breathe, yet can feel suffocating