If an observer on earth views polaris on the horizon the observer is located at the

Equator. Because the altitude of Polaris matches the degrees of latitude

equator (0°)

Explanation:

The Polaris is a north star and is located in the above the zenith and is a part of the brightest constellation and the distance is about the 433 light-years and is located near the north celestial pole and it needs a clear latitude to view this star is thus viewed from the equator and would appear slightly right side. And this star disappears in the southern hemisphere.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.