Once you have the reference point you can then establish that something has moved.  The distance it compared to the reference point is the amount of motion.
 Hint:Distance is measured in meters
 Now that we know how far something has moved compared to a reference point we next need to know how long it took (time) to move.  From this we can get speed. (speed = distance / time) To find the average speed of an object we just take the total distance it covered and divide by the total time it traveled.The car at the left stops at some lights and a stop sign, so sometimes it is standing still, but its average speed is 25 miles / hour. Remember: We can use any units for distance (miles, meters, inches, cm, km, etc.) and any
distance for time (minutes, seconds, hours, years, centuries).  In our class we will normally be using
cm/sec due to the size of the room and the speed that most of my toys move.

Also remember: When you label the number for speed you must label it in the units you used. (if
you measured meters and seconds then it will be meters/sec.)
Chapter 12 - Matter in Motion - Speed     