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Across
  1. 3. increase in the rate or speed of something
  2. 5. Bang Theory history on how the solar system formed
  3. 8. having only magnitude not direction
  4. 9. a set of connecting things or parts where it makes a whole
  5. 12. the great size or extent of something
  6. 13. a coherent typically large body with no definite shape
  7. 14. a body's relative mass or the quantity of matter contained by it
Down
  1. 1. a tendency to do nothing or remain unchanged
  2. 2. push or a pull
  3. 3. Age exact age of an object
  4. 4. where opposing forces are equal
  5. 6. the speed of something in a given direction
  6. 7. fall object falling where only force acting on it is that of gravity
  7. 10. how fast something is traveling
  8. 11. age approximate age