I NEED HELP AS FAST AS YOU CAN :You launch a weather balloon. It travels high into the atmosphere. Below is the beginning of three models drawn by another student to explain what is happening as the balloon rises higher in the atmosphere. Write a short explanation for what is happening to the pressure inside and outside of the balloon as it rises. Be sure to include each altitude (Near Earth, Midline, Near Space). *

Ireally don’t know

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 answer is periosteum