In order to serve as an effective representation of an object, scale models must These are the choices
A maintain the relative values of size of the object being modeled.
B.
deviate from the appearance of the object being modeled.
C.
be able to perform the same function as the object being modeled.
D.
exaggerate the size of important aspects of the object being modeled.

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

Iwould say earthquakes.

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