Science crossword puzzle

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Across
  1. 2. anatomy, the difference and similarities of anatomy
  2. 3. the regions of the surface
  3. 5. group, experiment or observation to minimize the effects of variables other than independent variable
  4. 6. variable, a variable that stays the same
  5. 8. give a brief statement
  6. 10. examine or study something very closely
Down
  1. 1. variable, manipulating
  2. 4. structure, it is an organ or body part that appears different animals but has the same structure
  3. 7. Dependent variable, responding variable
  4. 9. form an idea of the amount of numbers