The acceleration due to gravity is lower on the moon than on earth. which one of the following statements is true about the mass and weight of an astronaut on the moon's surface, compared to earth? the acceleration due to gravity is lower on the moon than on earth. which one of the following statements is true about the mass and weight of an astronaut on the moon's surface, compared to earth? both mass and weight are less. mass is less, weight is the same. both mass and weight are the same. mass is the same, weight is less.

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.