Scientific adjectives

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Across
  1. 1. Existing in fact.
  2. 3. Happening or done without delay.
  3. 4. Proving that something is true, or ending any doubt
  4. 5. Worth paying attention to; interesting or significant.
  5. 9. Tending to cause harm.
  6. 11. Achieving the results wanted or hoped for.
  7. 13. To have control and authority over something or someone and the duty of taking care of it, him, or her.
  8. 14. Firmly fixed or not likely to move or change.
  9. 15. Such as well might happen or be true; probable.
Down
  1. 2. Complete and including everything that is necessary.
  2. 6. Happening or being near the end of a period of time.
  3. 7. Not lasting or needed for very long.
  4. 8. Seeming reasonable or probable.
  5. 10. Existing or happening in many places and/or among many people.
  6. 12. Causing someone to believe something that is not true.