Word study#1

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Across
  1. 1. Relating to actual experiments or observations
  2. 3. Based on reasoning or logic rather than practical experience
  3. 4. A measurement of space or extension in one direction
  4. 5. A reference to a published work
  5. 6. The proportion of a whole that a part represents
Down
  1. 1. To make clear or comprehensible
  2. 2. A distinct part of a text, often expressing a complete thought