For social studies i know the answer is called a boundary
A border :)
The out edge of a cup is called the 'Rim'.
It is called a side or edge.
Called a straight edge
brim
An edge.
For social studies i know the answer is called a boundary
cresent crescent
cresent crescent
cresent crescent
That would be a cresent moon.
cresent crescent
That would be a cresent moon.
That would be a cresent moon.
That would be a cresent moon.
That would be a cresent moon.
The seaward edge or its sharp drop-off from the shoreline is called continental shelf break. This region is also the area wherein continental slope begins.
The region of a country bordering on another or a line, barrier, etc., marking such a border is called a frontier. A frontier is also the edge of the settled area of a country.