How does depth increase with the earth layers?

Geothermal gradient is the rate of increasing temperature with respect to increasing depth in Earth 's interior. Away from tectonic plate boundaries, it is about 25–30 °C/km (72–87 °F/mi) of depth near the surface in most of the world.

the following sets of characteristics describe what we know about the outer plants is c. rocky surface, closet to the sun and larger in size