Motion Crossword Puzzle

QUESTIONS LIST: meter : the si for length and distance, direction : the line along which something moves, reference point : a place or object used for comparison to determine if something is in motion, velocity : speed in a given direction, acceleration : the rate at which velocity changes, millimeter : it takes 1000 of these to make a meter, speed : the distance an object moves per unit of time, kilometer : it takes 1000 meters to make this, distance : the length of the path between two points, si: international system of units, motion : a change in position relative to another object, instant : a point or short space in time, time : the period of duration between two events, centimeter : it takes 100 of these to make a meter