Question

The geothermal ___ is about 25C for every 1 km of depth below Earth's surface.

Answer 1

The geothermal gradient is 25c for every 1k of depth below Earth's surface

Answer 2

Gradient

Step-by-step explanation:

• There is an increase in the internal temperature of the earth with an increase in the depth from the surface.

• The average geothermal gradient near the surface is about 25 degrees centigrade for every one kilometer of depth.

• In some areas there is a much higher heat flows because of the presence of deep fault zones, rifting, magmatic intrusions, or active tectonic forces.

• Conditions in the deep mines can be quite uncomfortable and hot enough to explode rocks or bend steel due to the presence of geothermal gradient.