The average speed of sound in water is 1,500 m/s. How long would it take a sound wave to travel 250,000 km? (HINT: Use your dimensional analysis and metric conversion skills and remember:
K H D u d c m)

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. 

The fertilized egg  begins to develop into a hollow ball of cells called the blastocyst. 

Simple, don't do it. just don't go to that dock