The earth<span> is made up of </span>layers<span> (crust, mantle, outer core, and inner core). Each one has a unique make-up to it. This is the outer </span>layer<span> of the </span>Earth<span> about 10 miles or so thick. Mostly made up of </span>rock<span> and loose material. hope this helped! please choose brainlest :)</span>
Answer:
to provide a reference system
Explanation:
The equator and prim meridian used on maps provides a reference system for determining location and navigating the earth.
- An equator is the only line of latitude that is a great circle.
- Prime meridian is a line of longitude that is 0°
- When both are used, they can form the basis of a reference system to determine places on earth.
- Using these lines, we can assign values of coordinates to the earth surface to facilitate location determination.
The equator and prime meridian are used on maps to provide a reference system.
Answer:it depends
Explanation: sustainability of what?
A country? A company?
As long as we maintain anything economically and or socially
