system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can a geothermal system heat my house when it's 10 below zero and the system is 55 degrees?

I just can't wrap my head around how Geothermal Heat Pumps can create hotter air than the source fluid temperature without supplemental heat sources.
gpt
The answers here are wrong. The temperature a heat pump can warm a space is not limited to the temperature of the ground (55, in your example) or the outside air in the case of a traditional heat pump.

As long as the medium you're running through the ground (water, glycol, whatever) is a lower temp than  ground itself, you'll transfer heat energy to the system. The compressor and refrigeration components of the system then essentially concentrates the heat you've transferred and uses it to warm your space.