Describing the motion of an object is easier if you are able to reliably record where the object is at regular intervals. This can be accomplished with a motion sensor:
A motion sensor sends position data to a computer, which then plots data points on a distance-time graph, representing where the object is at each time interval. Depending on the shape of the graph, conclusions can be drawn regarding the object's motion.
So how do you interpret the shape of a distance-time graph? It can be helpful to try and match actual motion to an existing graph. In this activity, YOU will be the object, and you will attempt to match your motion to a pre-existing distance-time graph.