Why is latitude consistent but longitude changes?

Answer 1

That's not so at all. Every point on earth has a different set of latitude and longitude numbers.

If you feel like it for some reason, it's possible to travel in a way that only one of

the numbers changes and the other one doesn't.

-- If you drive straight east or straight west, you're staying at the same latitude

and driving through different longitudes.

-- If you drive straight north or straight south, you're staying at the same longitude

and driving through different latitudes.

But you don't have to do that. In general, as you move around to different places,

both your latitude and your longitude are changing.

Answer 2

Latitude measures how far north or south a location is from the equator, which does not change, making it consistent. Longitude, on the other hand, measures how far east or west a location is from the prime meridian, which can vary depending on the reference point used, leading to changes.