Science

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Across
  1. 3. make (a liquid) thinner or weaker by adding water or another solvent to it.
  2. 5. wholly directed to one thing; intense.
  3. 9. a minute portion of matter.
Down
  1. 1. clearly stated or decided; not vague or doubtful.
  2. 2. showing or involving great activity or vitality.
  3. 4. the greater number.
  4. 6. based on, concerned with, or verifiable by observation or pure logic.
  5. 7. cause (something) to change direction by interposing something.
  6. 8. not helping or supporting either side in a conflict.