Scientific vocabulary crossword

12345678
Across
  1. 2. withheld information from general knowledge
  2. 6. being the only one of its kind, unlike anything else
  3. 7. an individual item used for scientific study
  4. 8. a thing that is accepted as true but without proof
Down
  1. 1. childish or immature
  2. 3. great or important
  3. 4. a person who establishes an institution
  4. 5. the condition or fact of being exact