crossword puzzle after sheet #2

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Across
  1. 3. Within one dimension, what mathematical tool can we use to indicate direction?
  2. 4. an example of a quantity that is a scalar but can have a negative numerical value
  3. 5. Is time a scalar or is it a vector?
  4. 7. Quietude walks in the North-South dimension. If we want to do so, can we choose South to be the positive direction?
  5. 8. Peacefulness walked a distance of 35 m over the course of 7 s. In m/s, what is Peacefulness's average speed?
  6. 11. One dimensional motion is motion along a straight ______
  7. 12. the general name for a quantity that has both magnitude and physical direction
  8. 14. x is the symbol that represents an object's ______
  9. 16. the numerical value for speed can't be ______
  10. 17. When assigning numerical values to different positions, the reference location is called the ______
Down
  1. 1. final position minus initial position
  2. 2. average speed is ______/time
  3. 6. "Displacement" can be symbolized by writing ______x
  4. 9. Serenity takes a walk and ends up at the same place that she started. In m/s, what is her average velocity?
  5. 10. Are the origin and the initial position necessarily the same?
  6. 13. How many directions are in one dimension?
  7. 15. Is mass a scalar or is it a vector?