What is an example of involvement in our political system? a. Volunteering on a political campaign to get your ideas represented
b. Starting a business
C. Going to school every day
d. Traveling to another country

The earths atmosphere is made up of nitrogen and oxygensolids turning into gases is called sublimation.

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. 

Wow good luck with that answer