Biosphere 2

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Across
  1. 2. moisture in the air
  2. 3. closed (something) tightly so that air, liquid, etc., cannot get in or out
  3. 6. showing signs of future success
  4. 7. relating to a subject in an appropriate way
  5. 8. large and heavy, exceptionally large
Down
  1. 1. to provide what is needed for (something or someone) to exist, continue, etc.
  2. 3. having or providing as much as is needed
  3. 4. a part or area of a city
  4. 5. create (a feeling, especially a positive one) in a person